Product Overview

The Sinyinda SYCBCHF01P2DIP is a 2Pin high-current female connector (solder wire type·U-slot) designed specifically for 40A-class pure power lithium battery transmission scenarios. This product adopts 2 identical 20A power terminals, supporting 2 parallel current-sharing paths to achieve 40A continuous current carrying, and features true single-pin failure redundancy—even if one pin fails, the remaining pin can still carry a 20A regular load without interrupting power supply. It employs copper nickel-plated (50-80μ") high-wear-resistant contact technology, with a mating cycle life of ≥1000 times and stable contact resistance of ≤3mΩ; the PA66 insulating substrate balances mechanical strength and temperature resistance, with a rated voltage of DC 250V and an operating temperature range of -40℃ to +105℃. The dual-hole positioning design ensures installation accuracy of ±0.1mm, the asymmetric housing provides physical reverse-connection protection, and the recommended mating cycle life is 1000 times. The U-slot structure supports direct press-in soldering of AWG 10-18 gauge wires without pre-tinning, greatly improving assembly efficiency. It is particularly suited for application scenarios with rigid requirements for "40A-class power + flexible wiring + manual/semi-automatic assembly," such as TWS headphone charging case fast-charge ports, smartwatch magnetic charging bases, micro drone battery interfaces, and medical portable device power modules, and pairs precisely with the male connector SYCBCHM01P2R1 to form a complete 40A-class solder wire lithium battery interconnection solution.

Core Advantages Exclusive to 40A Solder Wire Power Terminals (2×20A Current-Sharing Version)

• 2×20A Homogeneous Terminals + Single-Pin Failure Redundancy:The 2 terminals are completely identical in size, material, plating, and pad specifications, with an initial contact resistance dispersion of <5%, ensuring a current distribution deviation of <±3% across each pin under 40A load; when a single pin fails due to contamination/damage/aging, the remaining pin automatically carries a 20A regular load, eliminating the need for system shutdown, extending MTTR from emergency repair to planned maintenance windows, and improving availability to 99.9%.
• Copper-Nickel Plated (50-80μ") High-Wear-Resistant Contacts:The nickel plating thickness reaches 50-80μ" (1.27-2.03μm), with a hardness of HV400-500, mating wear of <0.1μm per cycle, and a contact resistance change rate of <10% after 1000 mating cycles; the nickel layer exhibits excellent chemical stability, with salt spray corrosion resistance of >96h (5% NaCl), making it suitable for outdoor smart wearables, sweat environments in sports earphones, and high-altitude low-temperature conditions for drones, at a cost of only 1/5 of gold-plating solutions.
• High-Strength PA66 Substrate for Load Bearing:Tensile strength ≥80MPa, flexural strength ≥120MPa, capable of withstanding frequent open/close impact of TWS earbud charging cases (5,000 cycles without cracking) and vibration from micro-drone drops; CTI value ≥250V, meets UL94 V0 flame retardancy rating, heat deflection temperature ≥240℃ (1.8MPa), short-term resistance to 150℃ peak temperature without softening, ensuring housing deformation does not occur under 40A transient surge.
• U-Slot Wire Crimping Structure + No Pre-Tinning Required:The U-slot (width 2.5mm, depth 1.8mm) is designed at the bottom of the terminal, supporting direct press-in of AWG 10-18 gauge wires followed by soldering, without the need for pre-tinning or crimping terminals, greatly simplifying the assembly process; solder joint fullness is improved by 30%, and the cold solder joint rate is reduced to <0.1%.
• Asymmetric housing + guide groove dual keying:The housing features a trapezoidal profile with asymmetric guide ribs and grooves, ensuring the 2-pin position has a unique match, completely eliminating reverse insertion risk; guide groove depth of 2.5mm ensures all contacts are fully aligned before mating, preventing arc damage from hot-plugging, and supports blind mating operation.
• -40℃~+105℃ wide-temperature current-sharing stability:PA66 base material has been modified for low-temperature toughness, with no cracking upon impact at -40℃; at high temperature 105℃, the simultaneous rise rate of contact resistance for the 2 pins is <8%, avoiding current imbalance or redundancy failure caused by temperature drift differences; the sealing O-ring (optional) has a compression set rate of <20%, maintaining IP54 protection rating over long-term use.

Vertical Scenario 40A Solder Wire Power Application Guide