35-Pin Black TE AMPSEAL Sealed Wire-to-board Connector – TS30256-35P-21 Equivalent to 776164-1

The TS30256-35P-21 is a high-performance 35-pin black female connector engineered as a direct solution for applications requiring a TE AMPSEAL-style sealed wire-to-board connection. Designed to match the functionality of the 776164-1 model, this connector delivers reliable, weather-resistant performance in automotive, marine, and off-road vehicle systems where moisture, dust, and vibration are major concerns. Ideal for use in engine control units, audio harnesses, dashboard modules, and power distribution panels, it ensures stable electrical signal transmission in demanding environments such as cars, yachts, and UTVs.

Featuring a robust two-piece housing design with integrated secondary locking, the TS30256-35P-21 prevents terminal backout caused by mechanical stress or thermal cycling. After terminals are inserted into the housing, a locking wedge is inserted to secure all 35 positions simultaneously, enhancing connection integrity and long-term reliability. The connector supports a three-row contact layout on 4.0mm pitch centers, making it compatible with standard PCB layouts and industrial control boards. Each circuit cavity includes a molded-in sealing diaphragm that activates upon terminal insertion, creating a watertight seal that protects against water ingress and contamination.

Technical Details

Engineered for Harsh Environment Performance

The TS30256-35P-21 belongs to the AMPSEAL-style sealed connector series, designed to meet the rigorous demands of automotive and industrial applications. Its black thermoplastic housing, made from PBT+GF15% or PA66+GF30%, provides excellent resistance to heat, chemicals, and impact, ensuring durability under extreme operating conditions. The integrated sealing system maintains IP67-level protection when mated, preventing moisture and debris from compromising electrical connections.

If a terminal is removed, a dedicated sealing plug should be inserted into the vacant cavity to restore the seal and maintain system integrity. This feature makes the connector ideal for serviceable or modular wiring systems where future modifications may be required. The three-row, 4.0mm pitch layout supports high-density signal routing, making it suitable for complex control boards and multi-function modules in modern vehicles.

Complete Connector System Support

TSCN offers full system compatibility for the TS30256 series, including matching male housings (TS30256-35P-11), compatible terminals, and PCB Headers. This allows customers to build complete wire-to-board solutions without sourcing components from multiple suppliers. Whether used in factory installations or aftermarket upgrades, this connector ensures seamless integration and long-term reliability.

Custom Development & Manufacturing Services

We support OEM and ODM projects with full customization capabilities, including mold development, material specification, labeling, and packaging. Our engineering team works closely with clients to deliver tailored connector solutions that meet exact performance, environmental, and regulatory requirements. With over two decades of experience in Automotive Connector manufacturing, we serve customers across North America, Europe, and Southeast Asia with consistent quality and fast turnaround.

Quality and Environmental Compliance

All TSCN products are manufactured under IATF 16949 and ISO14001 certified processes, ensuring strict process control, traceability, and environmental responsibility. Each TS30256-35P-21 undergoes 100% inspection prior to dispatch to verify housing integrity, terminal alignment, locking function, and seal quality. Full RoHS compliance guarantees that no hazardous substances are used, supporting eco-friendly production and global market access.

About TSCN – Trusted Automotive Connector Manufacturer

Zhejiang Tongsheng Electronic Co., Ltd. (TSCN) has been a leading supplier of automotive connectors since 1998. Specializing in sealed connectors, wire harness systems, and precision mold development, we deliver high-reliability components trusted by OEMs and aftermarket brands worldwide. Our commitment to quality, innovation, and customer service drives our continuous growth in the global automotive industry.

Confirm Fitment Before Ordering

To ensure this connector matches your system, please compare it with your existing unit using the provided specifications and images. If you're unsure, submit a product inquiry with clear photos of your connector or the mating component—we’ll verify compatibility quickly.

Need a different connector or custom solution? Contact us at mandy@tscn.com.cn — we’ll help you find or develop the right part for your application.

Download Full Product Documentation

Visit our official website to access detailed technical drawings, packaging options, and application guides. Download the latest TSCN catalog to explore our full range of AMPSEAL-style sealed connectors, multi-pin housings, and wire-to-board solutions for automotive and industrial use.