QFS-026-04.25-L-D-PC4-TR

Rectangular Connectors - Arrays, Edge Type, Mezzanine (Board to Board) are commonly used for power and signal interconnection in electronic equipment. QFS-026-04.25-L-D-PC4-TR is one of the common choices for connecting boards. This article explores its application field and working principle.

Application field

QFS-026-04.25-L-D-PC4-TR is a SMT board-to-board mezzanine connector in the QFam iline of rectangular connector products. Featuring 4.2 mm pitch and 0.5 A current capability, QFS-026-04.25-L-D-PC4-TR typically is used to construct mezzanine structures for subsystem board or device connectivity and shares the same PCB footprint with other edge-types which allows the designer to mix and match different board-to-board connector types on the same PCB. It is a popular choice for applications such as medical electronics, HVAC, industrial, and transportation.

Working Principle

QFS-026-04.25-L-D-PC4-TR possesses the typical features of rectangular connectors - arrays, edge types, mezzanine (board to board), such as locking clip for secure mating, fully active contacts, and RFI grounding contact. It uses a surface-mount retainer (PPS & Polyamide PA 6.6 UL 94V-0) with dual detents which offer twice the normal retention compared with standard locks. This makes it suitable for high vibration applications. Its mounting holes are also bigger to accommodate a wider range of board thickness. The contacts are gold plated for a reliable connection.

Material Specification

QFS-026-04.25-L-D-PC4-TR uses a plastic material (Nylon 6T) and the contact material is Phosphor Bronze with gold plating. The contact resistance can be as low as 20 mΩ. The Pin header temperature range is -40°C to +125°C and the current rating is 0.5A per contact.

Conclusion

Rectangular connectors - arrays, edge types, mezzanine (board to board) are important elements for making connections between boards. This article explains the application field and working principle of the QFS-026-04.25-L-D-PC4-TR connector. It is a SMT board-to-board mezzanine connector with 4.2 mm pitch and 0.5 A current capability. It was designed for applications that require relatively high vibration tolerances. It uses a surface-mount retainer with dual detents and gold-plated contacts for a reliable connection. It is quite popular in areas like medical electronics, HVAC, Industrial and transportation.