4 Pin Connector Description:
Mechanical specifications:
Pogo pin arrangement: single or double row, pitch ≥1.00mm, Can achieve IP67 or IP68 4 pin magnetic connector or 4 pin connector.
Pogo pin type: male female pairing, using pogo pin design. Barrel range: 0.50mm to 15.00mm, customizable according to needs.
Working stroke: 0.10mm to 5.00mm, supports specific stroke adjustments. Insulation housing material: optional PEEK, LCP, PEI or HTN, with a temperature resistance range of -55°C to +125°C.
Pogo pin materials: stainless steel, brass, tellurium copper, beryllium copper, Inconel/SUS631/beryllium copper/Elgiloy springs, optional gold plating or composite electroplating.
Mechanical lifespan: ≥10,000 insertions and removals, Johoty can customize 500,000 high-lifespan cycles.
Installation methods: Through hole, SMT surface mounting, solder cup, double end, PTH bent pin or right angle, supporting customized non-standard sizes and hole positions.
Electrical parameters:
Rated current: Each pogo pin supports 0.1A to 50A, and a 4 pin connector can be customized for up to 200A high current. It depends on the pogo pin diameter, material, and effective size.
Rated voltage: 3.3V to 550V AC/DC.
Contact resistance: ≤20mΩ, stable during initial and lifecycle.
Insulation resistance: ≥100MΩ (under 550V DC conditions).
Voltage resistance: 550V AC for more than 1 minute.
Signal integrity: Johoty’s specially customized 4 pin connectors can support 10GHz high frequency and 10Gbps.
4 pin connector functional applications and key performance:
Function: Used for magnetic blind insertion, stacked connections, or stable electrical and mechanical interfaces under high vibration, supporting power transmission and data signal synchronization.
Key performance: low contact resistance fluctuation, high contact life cycles, anti-jamming design or POKA YOKE.
Compatibility: Can be matched with standard 2.54mm pitch PCB layout, and also supports non-standard pitch 1.00mm to 10.00mm and custom arrangement of mixed power and signal spring loaded pin.
Johoty value:
Johoty offers fully parameterized customization, covering pogo pin arrangement, stroke, materials, and coatings. Support small batch of 4 pin connectors to large orders of 4 pin electrical connector. We provide mechanical and electrical validation data based on customer specifications.
4 Pin Connector Catalogs:
4 Pin Connector Challenges and Solutions:
Trend of high density and miniaturization, 4 pin connector exhibit excellent current carrying and signal integrity
Engineer’s challenges: My equipment is getting smaller and smaller, but the power and signal frequency are getting higher and higher. The pogo pin I need must have a dimensional accuracy of ± 0.02mm and be able to stably carry 10A current. And maintain a contact resistance of <20mΩ and extremely low inductance to prevent signal attenuation and heating.
Johoty’s solutions: Full link precision electrical performance design and simulation Using simulation software ANSYS, precise simulations were conducted on the current density distribution, temperature rise, characteristic impedance, and crosstalk of the 4 pin connector during the design phase. Simulate stress distribution during insertion and extraction, fatigue life of springs, strength of housing, and contact stability under vibration.
Optimize the internal spring force of pogo pins, select gold plating to reduce contact resistance and insulation materials. In the miniaturized 1.00mm pitch design, achieve contact resistance as low as 15mΩ and excellent high-frequency signal transmission performance. Johoty provides a prototype 4 pin connector and an electrical performance simulation report that includes an S model.
Under extreme working conditions and long life cycles, 4 pin connector maintains stable and reliable contact interface
Engineer’s challenges: My product needs to cope with vibration, impact, cold and hot cycles, and corrosive environments. After 100,000 plugging cycles, any momentary failure of a spring loaded pin in a 4 pin connector may cause the system to crash. I cannot tolerate on-site malfunctions caused by issues with the 4-pin connector.
Johoty’s Solutions: Contact Interface Engineering and Accelerated Life Verification Based on Materials Science We delve into interface science, with the core being the matching of spring force and contact coating. Johoty uses high reliability, stress relaxation resistant SWP-B wires, Inconel, SUS631 or Elgilog springs. These spring materials can reduce spring force attenuation rate of 4 pin connectors by less than 5% throughout the entire lifespan.
For corrosive environments, Johoty offers advanced plating solutions such as selective gold plating, localized thick gold plating, and palladium nickel plating. All customized designs pass Rigorous testing, including temperature cycling from -55°C to 125°C, mechanical shock/vibration, and salt spray > 48 hours. Provide complete life curves and failure analysis data to achieve stability >100,000 cycles.
4 pin connector achieves high precision, manufacturability, and cost control for complex geometric shapes and irregular structures
Engineer’s challenges: My PCB layout or housing structure is very special and requires a non-standard shaped 4 pin connector. I need a shaped plastic housing, specific locks, and a double row staggered arrangement. I am concerned that the manufacturing tolerances and capabilities of the supplier may not be able to achieve my design. Or due to the complexity of the process, the yield may be low, the delivery time may be long, and the cost may be out of control.
Johoty’s solutions: rapid prototyping and intelligent manufacturing integrating additive manufacturing and precision injection molding Johoty integrates industrial grade 3D printing SLA/DLP and CNC housing machining to provide functional prototypes for early assembly and testing validation within 2 weeks. In mass production stage, Johoty uses high-precision molds with a mold core accuracy of ± 3μm and fully electric injection molding machines. Ensure the precision molding tolerance of plastic housing can reach ± 0.03mm and extremely low warpage rate.
Johoty’s CFT team is proficient in DFM/A (Design for Manufacturability and Assemblability) and will proactively optimize your design. Meet all functional requirements, simplify assembly steps, and improve production yield. Realize seamless transition from the 4 pin connector concept to reliable batch pogo pin connectors while maintaining competitive costs.
Why Choose Johoty’s 4 Pin Connector?
4 pin connector has customized single or dual rows, male & female to transfer power and signals at best price, Johoty is trustworthy!
Benefits of 4 Pin Connector
4 pin connector is designed based on mechanical design and integrated degrees of freedom to address space constraints and irregular structures
Benefits: Johoty can provide standard 4 pin connectors. Allow engineers to optimize the housing shape, installation method, single/double row pogo pins, and assembly size of 4 pin connectors. 4 pin connectors can passively adapt to existing compact or irregular application spaces. It does not force engineers to sacrifice valuable layout space or modify the core structure in order to accommodate a standard 4 pin connector.
Solved challenges: Engineers from consumer electronics, medical devices, and high-end testing equipment often face pressure to embed more functions into smaller and more complex designs. They aspire to achieve reliable electrical connections under extreme spatial constraints, without compromising the mechanical integrity and aesthetic design of the product. Johoty’s deep customization capability directly transforms the 4 pin connectors from an object that needs to be designed into a tool that can serve design.
From the perspective of electrical performance and signal integrity, 4 pin connector is designed to handle high reliability power supply and high-frequency signal transmission
Benefits: Johoty can accurately customize the impedance of pogo pins and the current carrying capacity of 50A per pogo pin according to engineers’ specific electrical needs. Adopting superior high wear-resistant gold coating or composite electroplating. This ensures low contact resistance and long-term stability under high current transmission, low loss and low crosstalk under high-frequency signals.
Solved challenges: This comes from power systems, high-speed data communication, or precision measurement modules. Engineers need to ensure that spring loaded pins maintain a constant low contact resistance and excellent signal integrity under repeated connections, vibrations, and environmental changes. Avoid becoming a bottleneck in system performance due to the 4 pin connector itself. Johoty’s customized electrical specifications and 4 pin connector is no longer an uncertain factor in system reliability. It is a deterministic component that has been precisely calculated and validated.
4 pin connector addresses the challenges of high durability and low maintenance costs of products through high lifespan and maintainability
Benefits: When customizing, Johoty optimizes the material, coating, and mechanical curve of the spring in a targeted manner. We can achieve a plug and unplug lifespan far exceeding 100,000 times, up to 200,000 or 500,000 times. The provided male and female end perfect matching scheme ensures optimal wear of the contact interface. Reduce the probability of complete machine maintenance caused by 4 pin connector failure.
Solved challenges: Automotive, automation industry, and professional level equipment engineers often need to maximize the durability of critical interfaces. Match the long lifespan of 4 pin connectors to minimize on-site failures and after-sales maintenance costs. A customized 4 pin connector that has undergone deep life optimization, which directly translates into product reliability and total cost advantage in the market.
On SCM resilience and engineering efficiency, 4 pin connector addresses project cycle compression and supply chain risks
Benefits: As a Chinese manufacturer with extensive manufacturing experience, Johoty has internalized the entire process from prototype to mass production of 4 pin connector. We provide one-stop services from concept discussion, rapid prototyping, to bulk delivery. This collaborative engineering model greatly shortens the design iteration cycle. A mature localized supply chain system ensures stable production capacity and competitive cost control under customized needs.
Solved challenges: Engineers often struggle with repeated communication and lengthy delivery times with suppliers when driving innovative projects. We need to reclaim valuable design validation time to ensure that critical customized components do not experience delivery delays or quality fluctuations during the mass production phase. Johoty represents not only a supplier, but also an engineering partner who can deeply participate, respond quickly, and ensure stable delivery. This directly solves the core challenges for engineers in project management and supply chain risk control.
4 Pin Connector Applications:
Industrial automation equipment
Challenge: Require high stability and low failure rate connection solutions, often encountering unstable connections or frequent failures.
Johoty’s function: Provides flexible customized 4 pin connectors to meet the needs of different device forms and electrical specifications, ensuring stable connections.
Customized solution: Johoty can adjust the size and shape of the 4 pin connector according to device space, working environment, and electrical requirements to ensure compatibility and stability.
How to solve: precise customization without poor connection or device failure, Johoty’s 4 pin connectors can improve the overall performance of customer devices.
Efficiency improvement/cost savings: Increase the service life of equipment, achieve a 10-year warranty, reduce maintenance costs, and improve production efficiency.
Advantages: Johoty’s 4 pin connector has high precision and long-term stability, reducing industrial automation equipment system failures and downtime.
Medical equipment
Challenge: It is necessary to meet strict medical equipment standards, with crucial high reliability and continuous electrical performance stability for 10 years.
Johoty function: The flexible customization of Johoty’s 4 pin connectors can solve the problems of medical engineers and ensure the efficient and safe operation of medical equipment.
Customized solution: Johoty can customize suitable sizes and electrical specifications according to the requirements of different medical devices, providing high-precision connections of ± 0.05mm.
How to solve: optimize the connection method, connect the male and female terminals or use magnetic suction to prevent errors, ensure the accuracy of electrical signal transmission, and reduce medical equipment failures.
Efficiency improvement/cost savings: reduces the cost of medical equipment maintenance and expensive spare parts replacement caused by connection failures, and the equipment stability is very high.
Advantages: Johoty’s 4 pin connectors can adapt to high demand environments, providing 100,000 stable connections, and medical equipment can work accurately.
Smart home devices
Challenge: Multiple devices frequently connect to the internet, with high requirements for connection stability and limited space.
Johoty function: Provides Johoty’s 4 pin connector that adapts to different smart home devices, with a low profile and stable electrical connection.
Customized solution: Johoty customizes 4 pin connector size and shape according to the design requirements of smart home devices, compatible with various smart home products.
How to solve: Customize Johoty’s 4 pin connector solution to effectively address space constraints and unstable connections.
Efficiency improvement/cost savings: Improve equipment operation stability, based on 100,000 stable connections, can reduce maintenance frequency and costs.
Advantages: Johoty’s 4 pin connector has a compact design and strong compatibility, allowing smart home devices to operate stably for a long time.
Electric vehicle charging system：
Challenge: When a high-power current of 200A passes through, the connector is prone to poor contact or overheating.
Johoty function: Customize a 4 pin connector with high current carrying capacity, ensuring a stable 50A per pogo pin current during charging.
Customized solution: Adjust the electrical and dimensional specifications of the 4 pin connectors according to the requirements of the electric vehicle charging system to carry a high current of 200A.
How to solve: Johoty’s 4 pin connector improves current transmission stability, avoiding EV overheating and poor contact.
Efficiency improvement/cost savings: Improve EV charging efficiency, extend the service life of EV charging systems by up to ten years, and have a very low failure rate.
Advantages: 200A high load capacity, Johoty’s 4 pin connectors ensure fast and safe charging of EVs.
Unmanned Aircraft System
Challenge: Connection stability directly affects the flight performance of drones, and a balance needs to be found between weight and connection stability.
Johoty function: Johoty customizes lightweight and high-performance 4 pin connector that are lightweight, impact resistant, high current, and have stable electrical connections.
Customized solution: Customize small, lightweight 4 pin connector, SUS631 or Elgiloy springs, ultra-low elasticity attenuation compatible with different models of drones.
How to solve: By designing a customized 4 pin connector, the connection is stable and lightweight, optimizing the stability of drone flight.
Efficiency improvement/cost savings: The reliable performance of the drone system is stable for at least 10 years, and the maintenance cost of electrical connection failures and mechanical failure risks are almost non-existent.
Advantages: Compact, lightweight, and highly reliable. Johoty’s 4 pin connector, as a connection solution for drones, can operate stably for a long time and is efficient and safe.
Robot manufacturing
Challenge: The complex connections of multi joint and multi axis robots require stable transmission of signals and power in high vibration and harsh environments.
Johoty function: Providing highly reliable and vibration resistant IP67 water proof 4 pin connector, precise control and high reliability of robot systems are not a problem.
Customized solution: Johoty provides customized 4 pin connector based on the specific design requirements of the robot. The robot system can work perfectly under high vibration, high frequency, and high load.
How to solve: Provide customized 4 pin connector solutions, stable multi-point connections, and optimize the overall performance of the robot.
Efficiency improvement/cost savings: Improve the stability of the robot control system, with almost no downtime and MTBF exceeding 10 years.
Advantages: Johoty’s 4 pin connector has stable high-frequency transmission and can improve the performance of robots in complex working environments.
Communication equipment
Challenge: The connector needs to transmit 10GHz high-frequency signals and maintain stability in harsh environments such as EMC.
Johoty function: Customize 4 pin connector to optimize electrical performance, ensuring high stability of communication signals at 10GHz or 10Gbps transmission.
Customized solution: Customize a 4 pin connector according to the frequency requirements of the communication equipment. The lossless transmission of 10GHz high-frequency signals is often recognized by customers.
How to solve: Through customized design, reduce signal loss and ensure efficient operation of communication equipment.
Efficiency improvement/cost savings: Johoty’s 4 pin connector can improve the signal quality and transmission stability of communication systems, reducing engineers’ maintenance frequency and costs in communication equipment.
Advantages: Supports high-frequency signal transmission, perfectly meeting the stability, security, high efficiency, and no packet loss requirements of communication equipment.
Wearable devices
Challenge: Requires IP67 water proof and magnetic connection in high-density space, with high reliability and durability of electrical connections.
Johoty function: Provides 4 pin connector suitable for wearable devices, which can also support high-precision and stable connections underwater or under vibration.
Customized solutions: customized small low profile, IP67 waterproof, Low loss 4 pin connector, suitable for compact wearable devices.
How to solve: Through customized design, solve connection stability issues under limited space, rainwater spraying, or high vibration.
Efficiency improvement/cost savings: Johoty’s 4 pin connector extends the lifespan of wearable devices by over 10 years, reducing return, exchange, and repair costs.
Advantages: Compact and efficient, strong durability, Johoty’s 4 pin connector ensures high performance, wear resistance, moisture resistance, and shock resistance of wearable devices.
4 Pin Connector Advantages:
The 4 pin connector designed for limited space has ultimate mechanical adaptability:
Challenges solved: PCB layout space is extremely precious in wearable devices, endoscopic robots, and modular drones with high-density electronic systems. The internal structure of these device casings is irregular. Standard connector shapes and sizes often cannot be directly integrated. Forcing engineers to make expensive structural modifications or performance compromises.
Johoty’s customization advantages:
- Johoty can provide mechanical degrees of freedom beyond standard catalog connector. Customize to an accuracy of ± 0.05mm based on specific installation dimensions, OD, and stack height. This not only refers to the 4 pin connector, but also includes the docking guide structure of the male and female ends, the right angle and oblique angle design of the housing, and the single/double row and specific pin sequence of pogo pins.
- This tailored fit allows 4 pin connector to become part of the structural design. Rather than an independent component that needs to make space for it. Assist engineers in achieving optimal space utilization and structural integrity at the system level.
Based on optimized electrical performance, precise electrical parameter customization for 4 pin connector:
Challenges to be addressed: High frequency and high-speed USB 3.0, high current fast charging, motor drive or high-precision sensor sampling have vastly different and demanding requirements for the electrical performance of connectors. Universal connectors often have shortcomings in impedance continuity, >10A current carrying, and contact resistance.
Johoty’s customization advantages:
Current rating: Johoty customized pogo pin internal spring material, wire diameter, as well as plunger/barrel diameter and gold-plated material. Accurate current ranging from 0.1A to 50A can be achieved for each spring loaded pin.
Impedance control: For high-speed signals, dielectric materials, pogo pin spacing, and dedicated grounding pins can be customized. Achieve differential impedance of 50Ω or 90Ω to minimize signal loss, reflection or attenuation.
Contact resistance and lifespan: Customized coating of Au/Pd/Pt/Ru/Rh over Ni with a thickness of ≤5μm. The 4 pin connector can maintain a stable contact resistance of 15mΩ in harsh environments. Meet the required plugging and unplugging lifespan of over 50,000 times for the project.
Excellent reliability and robustness of 4 pin connector in harsh environments:
Challenges solved: often come from industrial automation, outdoor communication, automotive electronics, or medical equipment. Connectors need to withstand environmental stresses such as mechanical vibration, temperature cycling, moisture, and corrosion. The failure risk of standard connectors under these conditions is the main risk source of the project.
Johoty’s customization advantages:
Anti-vibration and impact: Customized spring force and plunger tip structure, ensuring uninterrupted contact in continuous vibration environments. Housing can use LCP or metal shielding shells with higher strength and toughness.
Environmental sealing: Johoty offers customized sealing solutions for IP67/IP68. Use injection molding to make and integrate silicone sealing rings into the housing of the 4 pin connectors, effectively preventing dust and liquid from entering.
Temperature/corrosion resistance: Specially matched with high-temperature plastic Peek/HTN, special coatings or composite electroplating according to the equipment’s temperature range of -40℃ to +125℃ or higher, disinfectants, salt spray.
Johoty’s 4 pin connector accelerates R&D cycle and optimizes supply chain engineering collaborative design:
Challenge solved: High end projects typically adopt Agile development mode and require waiting for standard samples with long delivery times. Paying high mold fees for a small batch prototype stage will seriously slow down the development progress.
Johoty’s customization advantages:
Rapid prototyping: able to provide fast prototyping services for small batches and multiple versions. Engineers can use pogo pin connector with mechanical and electrical performance consistent with the final 4 pin connectors in the early design validation stage. Engineers can test and iterate 4 pin connectors under real conditions.
Seamless integration: Provide accurate 3D model STEP files and detailed installation dimension drawings. Engineers conduct advance interference checks and simulation analysis in the CAD environment to reduce later design changes.
Supply chain resilience: For medium to large-scale production, customized 4 pin connectors can establish proprietary and stable supply channels. This reduces the supply chain risk caused by shortages or shutdowns of standard parts. This can ensure long-term consistency of the 4 pin connector BOM.
FAQ
Problem: Endoscopic robot joints and miniature sensor modules with extremely limited space or non-standard layout. How does Johoty ensure that the spacing, height, non-circular arrangement. And, irregular inclined contact of customized 4-pin connectors can achieve an accuracy of ± 0.02mm and long-term stability?
Challenge: Engineers are not faced with simple size changes, but with achieving reliable electrical connections within extreme spaces. Prevent mechanical stress, insertion and removal wear, and signal integrity degradation caused by dimensional deviations.
Johoty’s solutions:
Precision molds and manufacturing processes:
- Johoty uses slow wire mirror EDM and ± 0.01mm milling technology to manufacture plunger, barrel, T-pin, ball, etc. The critical dimensional tolerance remains stable within ± 0.02mm.
- For irregular structures, Johoty uses five axis CNC for integrated molding to avoid cumulative errors caused by multi-component assembly.
Control of pogo pin coaxiality and perpendicularity:
- In double row or asymmetric layouts, Jhoty conducts a 100% full inspection of the position and perpendicularity of each spring loaded pin using CMM. All pogo pins are subjected to uniform force during insertion, eliminating unilateral wear and potential pin jamming risks.
Materials Science and Heat Treatment:
- Housing and key structural components are made of high rigidity, low creep LCP or special alloys, with specific heat treatment processes to release internal stress. Within the working temperature range of -40°C to 125°C, the mechanical structure dimensions are stable and not deformed.
Question: For high current transmission or high-frequency signals with >5A/logo pins. How can a customized 4 pin connector achieve and maintain extremely low contact resistance and circuit impedance? How to suppress temperature rise and potential drop from a physical structure to ensure power transmission efficiency and signal fidelity?
Core challenge: Engineers need to ensure that the 4 pin connector isn’t a bottleneck for system power consumption or signal attenuation in high power density designs. The temperature rise and impedance of a 4 pin connector directly affect the reliability and energy efficiency of the system.
Johoty’s solutions:
Low impedance design:
- Plunger tip of male and female 4 pin connector uses multi point contact. They are not traditional single point semi-circular contacts and can reduce contact resistance to below 20m Ω.
- Both the Plunger and the spring are coated with thick gold and beryllium copper with high conductivity. And the impedance is fundamentally reduced by optimizing the cross-sectional area of the current through FEA.
High frequency performance optimization:
- For high-frequency applications, Johoty provides coaxial pogo pins. The built-in grounding shielding layer controls the characteristic impedance at 50Ω/75Ω and effectively suppresses signal crosstalk.
- Adjust the dielectric constant of the housing and optimize the arrangement of signal pogo pins and ground pogo pins (such as G-S-S-G) to manage signal integrity.
Thermal management simulation:
- During the customization phase, Johoty will conduct electrical thermal coupling simulations based on your rated current. Predict the temperature rise curve of the 4 pin connector under continuous full load operation. Based on this, we suggest the optimal material and coating scheme to ensure that the thermal performance meets the requirements.
Problem: Often comes from automated testing equipment that is subject to vibration, impact, corrosive gases, or frequent plugging and unplugging. How can a customized 4 pin connector ensure stable electrical connection and mechanical performance throughout 10,000 or even 100,000 cycles?
Core challenge: Engineers need a 4 pin connector as a reliable interface. And, its lifespan should not be a weakness in the overall system reliability.
Johoty’s solutions:
Anti-vibration and impact design:
- Johoty optimizes the pressure stroke curve of the spring to provide a positive contact force higher than the standard value. The female socket can be designed with self-locking or guiding structures to prevent instantaneous disconnection caused by vibration.
- Double row pogo pins can provide better mechanical stability and resist multidimensional vibrations.
Ultra-long life coating and materials:
- For frequent insertion and removal, the needle is plated with hard gold, which has much higher wear resistance than ordinary soft gold. The 4 pin connector can easily achieve a stable and reliable lifespan of over 100,000 cycles.
- The spring is made of SUS631, Inconel, or Elgiloy with high fatigue strength. After pre compression treatment, the 4 pin connector has an elastic attenuation rate of less than 5%.
Environmental sealing:
- Johoty can integrate injection molded elastic sealing rings at the 4 pin connector interface. IP67 or IP68 dust and water resistance can also be achieved through over molding. The housing material can be PPS or PEEK, which are resistant to chemical corrosion. While the 4 pin connector has resistance to industrial corrosive media.
