Samtec QTH Series Straight Surface PCB Header 40 Contacts, 0.5 mm Pitch, 2 Row, Shrouded, Surface Mount QTH-020-04-L-D-DP-A

The Samtec QTH-020-04-L-D-DP-A is a straight surface mount PCB header designed with 40 contact positions, engineered for high-speed board-to-board interconnections in advanced electronic designs. The compact 0.5 mm pitch enables dense circuit layouts while maintaining signal integrity and robustness. The QTH series is renowned for its reliable connection technology, making it suitable for demanding industrial, commercial, and laboratory applications.

This PCB Header features a shrouded format with two rows, enhancing mechanical stability and preventing misalignment during assembly. The housing is constructed from black liquid crystal polymer, known for its strength and excellent electrical insulation properties. Contacts are manufactured from phosphor bronze and finished with gold plating, which provides exceptional conductivity, corrosion resistance, and secure mating cycles.

The header is designed for surface mount installation, aligning with modern PCB manufacturing processes. Its orientation is straight, simplifying integration with compatible sockets and connectors. The male contact gender allows direct interfacing with female PCB connectors, supporting versatile board-to-board architectures in industrial controls, instrumentation, and embedded systems.

Electrical specifications include a voltage rating of up to 220 volts AC and a current rating of 2.2 amps per contact, suitable for a wide variety of low and moderate power electronic circuits. The operational environment is broad, withstanding temperatures from -55°C up to +125°C, making this header effective in harsh conditions such as laboratory equipment, manufacturing machinery, and commercial electronics.

The Samtec QTH-020-04-L-D-DP-A is RoHS compliant and approved for use in quality-critical assemblies. Its solder termination ensures robust mounting and reliable long-term performance under vibration or thermal cycling.

40 contacts organized in 2 rows for robust signal and power interfacing. 0.5 mm pitch supports miniaturized and space-saving PCB layouts. Liquid crystal polymer housing provides enhanced mechanical strength and electrical insulation.

Gold-plated phosphor bronze contacts deliver high conductivity and resilience to wear and contaminants. Shrouded male header protects connections and ensures proper mating alignment. Surface mount configuration streamlines automated PCB production.

Applications span industrial control units, laboratory instrumentation, commercial electronics, communication boards, and embedded systems. The QTH series is preferred for reliability in crucial environments and where space efficiency is key.

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