What this 5.00 mm pitch header does that a 2.54 mm one cannot
The 7-1971845-7: The 5.00 mm pitch is the first decision point: it sets a wider board footprint than the common 2.54 mm or 0.100" pitch, which means the PCB trace routing under and around the header has more room, but the connector body is physically larger. Combined with the latch holder, the connection resists vibration-induced disengagement — useful in equipment that sees periodic shock or where the cable is routed near moving parts.
Glow wire compliance and flammability rating — why they matter
The V-0 rating means the material stops burning within 10 seconds after a flame is removed, with no flaming drips — a requirement for appliances, lighting fixtures, and industrial controls where the connector is inside an enclosure that must meet IEC/EN 60335 or similar standards. The 250VAC voltage rating and -40°C to 120°C operating temperature range align with typical appliance and general-purpose equipment environments. The temperature ceiling of 120°C is the housing material limit, not the contact interface — derate current above 85°C ambient per the manufacturer's curve.