Hirose BM20 series header, outer shroud contacts, 34 positions, 2 rows, 0.016" (0.40mm) pitch, surface mount, gold contact finish, 0.026" (0.65mm) height above board, 0.8mm mated stacking height.
| Parameter | Value |
|---|---|
| Series | BM20 |
| Mounting | Surface Mount |
| Connector type | Header, Outer Shroud Contacts |
| Height above board | 0.026\" (0.65mm) |
| Mated stacking heights | 0.8mm |
| Pitch | 0.016\" (0.40mm) |
| Package | Tape & Reel (TR) Cut Tape (CT) |
| Features | Solder Retention |
| Contact finish | Gold |
| Rows | 2 |
| Positions | 34 |
The BM20B(0.8)-34DP-0.4V(53): It's a board-to-board mezzanine connector — the 0.8mm mated stacking height and 0.026" (0.65mm) height above board set the gap between parallel PCBs.
You'll need fine-line traces between pads and a stack-up that keeps signal integrity through the mezzanine link. That gap is fixed — no adjustment if your enclosure has tighter clearance.
The pitch is 0.016" (0.40mm), which sets the pad spacing on your board footprint.
The mated stacking height is 0.8mm, with the header sitting 0.026" (0.65mm) above the board surface.