The Hirose DF40GB(1.5)-30DS-0.4V(58) is a 30-position receptacle from the DF40 series of board-to-board mezzanine connectors. The shielding and solder retention features tell you this was designed for a signal path that needs EMI containment and mechanical anchoring through reflow, not a general-purpose power interconnect.
The 1.5mm mated stack height is the defining dimension of this variant — it sets the gap between the two parallel PCBs when mated. At this height, the connector is suited for applications where the board-to-board clearance is tight, such as folding phone hinges or compact sensor modules. The 0.40mm pitch means the footprint is dense: each signal pair is on a 0.40mm center, so the breakout traces on the PCB need fine-line routing capability. The gold contact finish (2.00µin on the sibling DF40GB(1.5)-30DS-0.4V(51)) supports repeated mating cycles typical of modular designs where sub-assemblies are separated during test or field service.
Shielding and Solder Retention — Built for Signal Integrity in Production
The shielded construction is a differentiator at this pitch class — it means the connector has a metal shell that provides a ground plane around the signal contacts, reducing radiated emissions and improving immunity to external noise. This is a spec that matters when the connector sits near an antenna, a high-speed serial bus, or a switching regulator on the same board. The solder retention feature adds extra hold-down tabs on the SMT footprint, which keeps the connector from lifting during reflow and gives the joint better shear strength against the cable or flex strain that can occur during assembly handling.
Mating Half and Position Count
The mating half is the board-mount header that completes the mezzanine pair — the exact order code depends on the header's own stack height variant. The 30 positions match a 30-conductor parallel interface, common for LCD data buses, camera sensor interfaces, or GPIO banks in compact embedded systems.
The ROHS3 compliance covers the full substance restriction list, so it qualifies for EU-market equipment without an exemption review.