KR3810 Series Single Row Wire to Board Socket Connector

Circuits & Dimensions (Part No. H381001058001A, Drawing No. 3810WFRD101-A-S)

* Precision socket contact design with gold-plated phosphor bronze terminals, reinforced dual side mounting flanges, and full RoHS compliance.

Overview

The KONNRA KR3810 series is a heavy-duty 3.81 mm pitch 5-pin wire-to-board power socket connector designed for demanding power distribution and battery interconnect systems. Engineered to handle continuous operating currents up to 8.0A AC/DC at 250V AC/DC, the KR3810 delivers a highly reliable, low-resistance interface (≤20mΩ Max.) that bridges wire harnesses directly to control boards and battery terminals.

Built with precision-formed phosphor bronze spring contacts featuring selective gold plating over a robust nickel underplate, the KR3810 guarantees superior anti-corrosion, resistance to fretting corrosion, and stable contact pressure over extended mating cycles. The housing is molded from high-mechanical-strength PA6 engineering plastic and features integrated lateral mounting wings with an overall width of 36.70 mm, ensuring exceptional anti-vibration stability and structural ruggedness in high-vibration applications such as electric bicycle (e-bike) battery docks, portable power stations, and industrial motor controllers.

Key Advantages of KR3810 Series

• High-Current 8.0A Capacity per Contact: Engineered with heavy-duty phosphor bronze contact blades capable of handling sustained 8.0A continuous current at 250V AC/DC, making it ideal for DC power delivery and battery charging/discharging lines.
• Selective Gold Plating in Contact Area: High-durability gold plating over nickel barrier plate delivers an ultra-low contact resistance of ≤20mΩ, preventing contact oxidation and ensuring consistent electrical performance across hundreds of insertion/withdrawal cycles.
• Reinforced Side Mounting Flanges (Wings): 36.70mm wide integral mounting ears provide robust screw or slot panel mounting, absorbing mechanical insertion stresses and preventing PCB solder joint fatigue under intense vibration.
• Optimized 3.81mm Pitch Geometry: Generous 3.81mm centerline spacing ensures high dielectric clearance, easily meeting 500V AC dielectric withstanding voltage and preventing electrical creepage or short circuits.
• Rugged PA6 Thermoplastic Construction: High-strength PA6 insulator body provides excellent impact resistance, wide temperature endurance from -40°C to +70°C, and full compliance with RoHS environmental standards.