Hybrid Signal/Power Mezzanine Socket — 4 Signal + 2 Power Contacts
The Hirose BM25-4S/2-V(53) is a 6-position socket from the BM25 series, configured as 4 signal contacts plus 2 dedicated power contacts in a dual-row arrangement. This hybrid layout lets a single connector carry both low-current signal lines and a higher-current power feed through the same mated pair, saving board space versus separate connectors. The socket uses center strip contacts — the mating interface is a row of flat contacts that wipe against the header's outer shroud contacts, giving a controlled mating force and defined contact position. Gold plating on the contacts suits repeated mating cycles and environments where corrosion resistance matters.
This socket mates with the BM25-4P/2-V(53) header, which carries outer shroud contacts that engage the socket's center strip contacts. The 6-position count (4 + 2 power) must match on both halves — the header is also a 6-position (4 + 2 power) part. The surface-mount footprint uses the solder retention features to keep the connector aligned during reflow; the pad layout follows the BM25 series standard pattern. No pitch value is listed in the available data, so confirm the pad spacing against the product drawing before committing the board layout.