Product Overview

The Sinyinda SYCBCHF01P4CSMT is a 4Pin high-current female connector (SMT version) designed specifically for 80A-class pure power lithium battery transmission scenarios. This product features 4 identical 20A power terminals, supporting 4-way parallel current sharing to achieve 80A continuous current carrying, and offers true N+1 redundancy capability—even if a single pin fails, the remaining 3 pins can still carry a 60A regular load without interrupting power supply. It employs a copper nickel-plated (50-80μ") high-wear-resistant contact process, 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°C to +105°C. The four-hole positioning design ensures SMT placement accuracy of ±0.1mm, the asymmetric housing provides physical reverse-connection protection, and the recommended mating cycle life is 1000 times. It is particularly suited for application scenarios with rigid requirements for "80A-class power + fully automated assembly + zero manual intervention," such as TWS earbud charging case super-fast-charge ports, smartwatch magnetic charging bases, micro drone battery interfaces, and medical portable device power modules, pairing precisely with the male connector SYCBCHM01P4R1 to form a complete 80A-class SMT lithium battery interconnect solution.

Core Advantages Exclusive to 80A SMT Power Terminals (4×20A Current Sharing Version)

• 4×20A Homogeneous Terminals + N+1 Redundancy Architecture:The 4 terminals are completely identical in size, material, plating, and pad specifications, with an initial contact resistance deviation of <5%, ensuring a current distribution deviation of <±3% across each pin under an 80A load; when a single pin fails due to contamination, damage, or aging, the remaining 3 pins automatically share the current to carry a 60A 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 impacts of TWS earbud cases (5000 cycles without cracking) and drop vibrations of micro drones; CTI value ≥250V, meeting UL94 V0 flame retardant rating, heat deflection temperature ≥240°C (1.8MPa), with short-term tolerance of 150°C peak temperature without softening, ensuring the housing does not deform under 80A transient surges.
• SMT automatic placement process compatibility:Terminal pad size standardized (3.0×2.5mm), compatible with mainstream reflow soldering profiles (peak temperature 245℃±5℃, duration 60-90s); four-hole positioning design (Φ1.85mm) ensures placement accuracy of ±0.1mm, preventing misalignment-induced cold joints or short circuits; for mass production, AOI optical inspection + X-Ray penetration dual verification is recommended to ensure full, void-free solder joints.
• Asymmetric housing + guide groove dual keying:The housing features a trapezoidal profile with asymmetric guide rib grooves, ensuring unique 4-pin orientation to completely eliminate reverse insertion risks; the guide groove depth of 2.5mm ensures all contacts are fully aligned before mating, preventing arc damage from hot-plugging, and supports blind mating operations.
• -40℃~+105℃ wide-temperature current-sharing stability:PA66 base material has been modified for optimized low-temperature toughness, with no cracking upon impact at -40℃; at high temperature of 105℃, the synchronous rise rate of contact resistance across the 4 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 Application Guide for 80A SMT Power Connectors