54-Position Dual-Row Header — Board-to-Board Breakaway
The 77317-804-54LF: It uses a breakaway design — the strip can be cut to shorter lengths if the full 54 circuits aren't needed, though this unit ships fully loaded.
This header is unshrouded — the pins are exposed on all sides. There is no plastic wall to guide the mating receptacle, so alignment relies on the receptacle's own housing or a separate keying feature. The push-pull fastening type means there is no latch; the connector pair is held together by friction from the pin-receptacle interface. In a high-vibration environment, consider a locking receptacle or a secondary retention method. This sets the clearance for adjacent components on the board. The housing material is rated UL94 V-0, which is the standard flame-retardant grade for equipment inside an enclosure.