What This Header Fits – Pitch, Positions, and Locking Ramp
The 1376382-1: The shrouded 4-wall design and locking ramp keep the mating receptacle seated under vibration – the ramp clicks into the housing latch, so you should hear it seat. It's a through-hole part with kinked solder posts (3.50mm post length) for wave-solder retention.
Current, Voltage, and Temperature – What the Ratings Mean
The voltage ceiling is 300VAC. The housing is glass-filled PA66 rated UL94 V-0, so it's flame-rated for equipment inside an enclosure.
That's a different current and voltage class – the 1376382-1's 5.00mm pitch and 300VAC rating put it in a heavier power tier.