Samtec ST4 Series Straight Surface PCB Header 100 Contacts 0.4mm Pitch 2 Row Shrouded ST4-50-2.50-L-D-P-TR

The Samtec ST4-50-2.50-L-D-P-TR is an advanced straight surface mount PCB header engineered for integration in compact, high-speed electronic systems requiring high-density interconnects. Designed as part of the ST4 Series, this header delivers reliable performance with 100 contacts arranged in two precise rows and a fine 0.4 mm pitch, making it ideal for applications demanding minimal footprint and robust electrical connectivity.

Utilizing a surface mount configuration, the ST4-50-2.50-L-D-P-TR supports modern automated assembly processes and ensures consistent, high-quality connections on printed circuit boards. Its shrouded body improves mating accuracy while mitigating the risk of bent pins or misalignment. The compact design is complemented by a housing made from durable liquid crystal polymer, providing excellent resistance to heat and chemicals during soldering and operational life.

The header is rated to handle up to 1.6A of current per pin (with 2 pins powered simultaneously), supporting both high-speed signal transmission and moderate power delivery. Its phosphor bronze contacts, finished with silver and tin plating, offer superior electrical conductivity and long-term durability, making the connector suitable for demanding industrial, telecom, embedded computing, and instrumentation environments.

Designed for broad compatibility, it operates over a temperature range from -55°C to +125°C, ensuring reliable function in harsh and variable conditions. The connector's board-to-board system allows developers to establish secure interconnections between multiple PCBs, and the male contacts in the straight configuration allow for versatile placement within dense system layouts.

Offering mPOWER compatibility, the ST4-50-2.50-L-D-P-TR provides design flexibility for engineers working on power and signal distribution architectures. Its fully shrouded structure increases safety margins and enhances contact integrity during repeated mating cycles.

This PCB header is widely applicable in industrial control, automation, computing hardware, telecommunications, and instrumentation systems where compactness, high contact density, and robust surface mounting are required. It is particularly suited for devices or modules needing reliable, high-speed board-to-board connections.

Explore more PCB Header solutions and Samtec connectivity products in EnvMart’s Electronics Components category to support the efficient design of advanced electrical and electronic assemblies.