The 3-1969570-0: This is a 30-position, dual-row header from the Economy Power 2.5 series.
Friction lock and shrouding — vibration and misalignment protection
This is common on wire-to-board connectors in industrial panels and lighting fixtures where the cable is routed near moving parts.
Glow wire compliant — safety for lighting and appliances
The header carries a glow wire compliance rating per IEC 60335-1, which means the polyamide housing resists ignition under a glowing-wire test at 850 °C. This is a requirement for lighting ballasts, household appliances, and other equipment where a fault could expose the connector to high temperature. The UL94 V-0 flammability rating supports the same safety profile.