Product Description
This USB Type-A 4Pin plug terminal connector is designed for electrical and electronic cable assembly, providing a compact solution for both power delivery and high-speed data signal transmission. The connector uses a copper-alloy contact system with thick nickel under-plating and gold-plated terminals to ensure low contact resistance, stable conductivity, and long-term corrosion resistance.
The solder-cup terminals make it easy to attach power and signal wires in custom USB cables, chargers and adapters. A high-temperature black thermoplastic housing withstands lead-free reflow and hand-soldering processes, while the contact geometry is optimized for smooth mating with standard USB Type-A receptacles. With a current rating up to 3 A per pin and durability of 5,000 mating cycles or more, this connector is suitable for demanding PC, server, industrial and automotive electronics environments.
| Connector type | USB Type-A plug terminal connector |
| Function | Power and high-speed data signal transmission |
| Position / pin count | 4 pins |
| Pin style | Solder-cup / solder-crimp terminals for wire termination |
| Contact plating | Approx. 30 μ" gold on contact area, over 50 μ" nickel under-plating |
| Solder area plating | Heavy gold plating on solder & crimp area for reliable electrical connection |
| Rated current | 3 A max per pin at 250 VAC |
| Rated voltage | 250 VAC |
| Contact resistance | ≤ 30 mΩ (initial) |
| Insulation resistance | ≥ 1000 MΩ at 500 VDC |
| Dielectric withstand voltage | 500 VAC / 1 minute between contacts and shell |
| Durability | ≥ 5,000 mating cycles (USB plug/unplug) |
| Mating force | ≤ 35 N |
| Unmating force | ≥ 10 N |
| Housing material | High-temperature thermoplastic, UL94-V0, black |
| Terminal material | High-conductivity copper alloy |
| Wire termination range | Typically AWG 26–22 stranded copper wire (customization available) |
| Operating temperature | −25 °C to +80 °C (reference design range) |
| Environmental compliance | RoHS 2.0 + Halogen-Free |
| Custom options | Wire gauge, cable length, over-molding, color, packaging, OEM/ODM |
Applications
Custom USB data and charging cables for mobile phones, tablets, handheld terminals and consumer electronics
Internal wire-to-board USB jumpers in PCs, servers, routers and storage devices
Industrial control panels and HMI equipment requiring robust USB connectors for configuration or data logging
Automotive infotainment and diagnostic interfaces where reliable power and signal connectors are needed
USB extension, adapter and docking products that require customized cable harnesses or over-molded solutions
Precautions
Ensure the wire gauge and insulation OD match the solder-cup size to avoid poor wetting or mechanical stress at the terminal.
Observe recommended current and voltage ratings; do not overload the contacts in high-power charging designs.
During soldering, avoid excessive heating time and temperature to prevent housing deformation or loss of spring force in the terminals.
Keep contact surfaces clean; contamination such as flux residue, oil or dust can increase contact resistance and affect signal integrity.
For high-speed data transmission, use twisted-pair, shielded USB cable and maintain controlled impedance from cable to connector.
When used in automotive or industrial environments, consider additional over-molding, strain-relief and shielding to improve vibration resistance and EMC performance.
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