The JST B10P-VH(LF)(SN) is a 10-position, single-row header from the VH series, designed for board-to-cable/wire interconnects. It carries a 3.96 mm pitch — wider than typical signal headers — and is rated for 10 A per circuit at 250 V, placing it squarely in the power interconnect class rather than a signal-only duty. The through-hole solder termination and 1-wall shrouding with a locking ramp give it a positive mate with the matching VH receptacle housing, and the locking ramp holds the pair together under moderate vibration. Typical applications include power supply distribution, appliance control boards, and industrial equipment where a discrete wire harness feeds a PCB.
What the ratings mean for the fit
The 3.96 mm pitch is the first thing to check on the board layout — the footprint pads need that spacing. The 10 A per circuit rating is the headline number, but the limiting factor in practice is the temperature rise through the housing: the PA66 nylon UL94 V-0 body is rated for continuous operation between -25°C and 85°C, so derate the current if the ambient inside the enclosure pushes above 85°C. The tin-plated contacts on both mating and post sides are fine for moderate mating cycles — think a few dozen mates over the product life, not a field-service connector that gets cycled weekly. The 16.5 mm mated stack height is the z-height from board surface to the top of the mated receptacle — that's the clearance you need inside the enclosure.