Weidmüller SL-SMT 3.50/05/90RF 1.5SN BK BX Male Header Guide

The Weidmüller SL-SMT 3.50/05/90RF 1.5SN BK BX is a 5-pole male header built for compact, reliable board-level connections in industrial and electronic assemblies. It belongs to the BL/SL 3.50 family and is engineered as a high-temperature-resistant header suitable for THT/THR soldering with reflow-oriented production in mind. That makes it highly relevant for companies balancing manufacturing efficiency with long-term connection reliability.

Product Role and Design Concept

This Weidmüller header is designed for board connection and mates with compatible female plugs in the same connector platform. Its 90° orientation supports parallel cable routing relative to the PCB, which is useful in compact device housings and controlled wiring paths. The clip-on flange version also contributes to dependable mechanical positioning in assembled systems.

Technical Specifications

The datasheet identifies the product as a 5-pole male header with a 3.50 mm pitch and a solder pin length of 1.5 mm. It is rated at 320 V / 15 A under IEC data and 300 V / 10 A under UL data. Dimensions include 24.36 mm width, 11.1 mm depth, and 9 mm height. The header is tinned, black, and supplied in box packaging.

Why the 5-Pole Format Matters

A 5-pole header is a useful middle-ground format for designers who need more than a basic low-pole interface but want to keep PCB real estate under control. It fits well in signal groupings, mixed control functions, and compact subsystem interfaces where organized board connectivity is essential.

Weidmüller SL-SMT 3.50/05/90RF Production and Reliability Advantages

The 1.5 mm solder pin length is optimized for reflow soldering methods, which helps support modern assembly processes. At the same time, the THT/THR structure contributes to mechanical robustness. This balance between manufacturing efficiency and durable performance is one of the reasons the SL-SMT series remains relevant in professional electronics production.

Typical Applications

Typical applications include industrial electronics, control boards, building technology devices, automation modules, signal interfaces, and compact communication equipment that requires dependable male headers in a 3.50 mm pitch.

For more information about Weidmüller, reviewing the BL/SL 3.50 mating connector family is the best next step.

Weidmüller SL-SMT 3.50/05/90RF FAQ

What is the Weidmüller SL-SMT 3.50/05/90RF 1.5SN BK BX?

It is a 5-pole male PCB header for 3.50 mm pitch connection systems.

What are its main ratings?

It is rated at 320 V / 15 A under IEC data and 300 V / 10 A under UL data.

Why is it suitable for modern production lines?

Because the 1.5 mm solder pin length is optimized for reflow soldering methods, supporting efficient production workflows.

What kind of applications is it best for?

It is best for compact industrial electronics and signal-oriented board interfaces that need a reliable mating header.

Can it be coded?

Yes, the SL-SMT series allows coding, which can help reduce mismating risk in multi-connector designs.