Explore our premium range of precision-engineered connectors, audio sockets, and heavy-duty power interfaces.
The Four Pin Molex Connector (traditionally recognized as the Molex 8981 series and its corresponding global iterations) remains a fundamental cornerstone in modern power and electrical distribution systems. Featuring a standardized 5.08mm (0.200 in) pitch, this robust connector design is engineered to deliver low-voltage DC power across key internal hardware structures, combining high mechanical resilience with dependable current carrying capacities.
Constructed with premium Nylon 66 (UL 94V-0 or 94V-2 self-extinguishing grade), the housing ensures high dielectric strength and heat deflection resistance. The contact pins are formed from high-conductivity brass or phosphor bronze, finished with precision tin or selective gold plating to prevent oxidation and ensure stable contact resistance below 10mΩ.
Engineered to handle up to 250V AC/DC and continuous current ratings of 5A to 10A per circuit (depending on wire gauge, typically 18-24 AWG). Dual-cantilever terminal designs minimize insertion forces while maximizing contact retention, ensuring vibration-resistant connections in automotive and industrial environments.
Every OEM configuration we manufacture is compliant with strict international standards, including RoHS, REACH, UL, VDE, and ENEC. This guarantees that our connectors operate safely under ambient temperature ranges from -40°C to +105°C, ensuring robust performance in extreme environments.
As industries transition toward smart manufacturing and decentralized electrification, the demand for ruggedized, cost-effective wire-to-board and wire-to-wire connector systems continues to rise. The 4-pin Molex form factor is highly valued for its robust mechanics and simplicity.
In Automotive Electronics, these connectors power auxiliary infotainment units, sensory camera networks, and climate control distribution boards. In Consumer Electronics & Desktop Computing, they continue to provide raw 12V and 5V power channels to cooling fans, storage drives, and modular peripherals.
With the expansion of IoT and Smart Energy Systems, these connectors have found applications in LED driver controls, green energy storage monitoring circuits, and automated vending machinery, proving their versatility across diverse commercial sectors.
| Parameter | Standard Spec |
| Pitch Size | 5.08mm (0.200") / Custom |
| Current Rating | Up to 10A Max per circuit |
| Voltage Rating | 250V AC / DC |
| Contact Resistance | ≤ 10 mΩ Max |
| Dielectric Strength | 1500V AC/minute |
| Material Composition | Nylon 66 UL94V-0, Copper Alloy |
Understanding regional requirements allows our global partners to deploy 4-pin Molex systems across specialized localized industries.
In the US and Canada, our connectors are widely utilized in heavy-duty home appliance control boards and industrial HVAC thermostat circuits, designed to withstand localized ambient temperature fluctuations and residential safety requirements.
Meeting European environmental regulations, our halogen-free connector assemblies are integrated into localized solar micro-inverter telemetry systems and municipal smart grid metering nodes across Germany, France, and the UK.
In high-density industrial hubs like Japan, South Korea, and China, these connectors are deployed in PCB arrays for manufacturing robots, high-speed pick-and-place lines, and packaging equipment requiring secure wire-to-board power channels.
Established Year
Professional Employees
Jiangxi Production Area
Certified Quality Management
As data densities and power currents increase, the traditional 4-pin Molex form factor is evolving. Our R&D pipeline, in partnership with prestigious academic bodies, is actively shaping the future of low-voltage, high-current connectors.
Development of alternative micro-pitch series capable of handling double the current intensity (up to 20A per pin) while reducing the physical mounting area on double-sided PCB designs.
Transitioning toward Liquid Crystal Polymer (LCP) and specialized Nylon grades to handle the high heat profile of lead-free, surface-mount reflow processes exceeding 260°C.
Engineering customized terminal geometries to allow seamless feeding into automated crimping and terminal-insertion robotics, reducing downstream labor costs for OEM assemblers.
Integrating tactile click and positive-lock latches that prevent accidental unmating in high-vibration applications like off-road machinery and EV battery management systems.
Our company has been a electronic connectors professional manufacturers since 2004. The head office is located in Yueqing China. Company has more than 200 employees. branch in Jiangxi (factory)and Shenzhen(counter). We Cooperate with Shenzhen University to develop products. Main Markets Southern Europe,Western Europe,North America,South Asia,Domestic Market. Main products Power Jacks Series,Phone Jacks Series,Switch Series,RCA Pin Jack Series,Network socket series.
ChinaWellnow is an enterprise with a sense of social responsibility. It is actively committed to the improvement of enterprise activities, goods, services and other related quality and environmental protection (including biodiversity). At the same time, it builds a solid trust relationship between customers and business partners, and maintains and improves this trust relationship forever.We satisfy all our clients with advanced products,competitive prices, fast delivery and one-stop service. It's our mission to boost our customer's business.
Our localized networks in China ensure unparalleled supply chain resilience, high capacity, and streamlined logistics.
The headquarters of the company is located in Yueqing, Zhejiang Province, which is the national electronic and electrical distribution center. The headquarters has set up domestic and foreign trade department, technology research and development department and production department.
The office is set up in Shenzhen, China's trade center. It always pays attention to market trends, understands market demand and feeds back to the company's headquarters in time. It is an important window for trade.
With 5000 ㎡ production area and 200 professional production workers working hard in the production line. Next step is set up branch factory in Yunnan Province in 2021.
Our factory with its R & D, product engineering and quality control department, was certified with ISO 9001:2015 in 2005.Most of our products shown on this website are certified as being in compliance with UL,VDE and ENEC standards. We Cooperate with Shenzhen University to develop products.
This academic integration allows our team to apply breakthrough materials research and advanced automated testing procedures directly to our high-volume production lines, bridging the gap between engineering theory and scalable manufacturing reliability.
Operating our core manufacturing hub in Yueqing—the electronic capital of China—gives us unique structural advantages that optimize costs and lead times for global OEMs.
From mold tooling design, high-speed terminal stamping, polymer housing injection, to automated pin insertion, all processing phases are contained under our direct supervision. This vertical structure cuts intermediate costs and ensures quality control at every phase.
Proximity to Ningbo and Shanghai shipping ports, coupled with our trading hub office in Shenzhen, allows us to offer versatile shipping terms (FOB, CIF, DDP) and swift custom clearances, ensuring fast delivery timelines globally.
Long-standing, high-volume partnerships with major metal alloy mills and chemical refiners ensure prioritized raw material supply and shield our customers from sudden raw material price shocks or localized shortages.
Review engineering answers to commonly encountered challenges during wire harness integration and PCB layout designs.
From heavy-duty high-voltage adapters to precision PCB switches and jacks, discover our full industrial product lines.
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