74-Position Dual-Row Receptacle at 0.100" Pitch
Voltage rating is 1250 V, well above typical board-level signals (48 V, 120 V, 240 V), providing substantial margin for power distribution or high-voltage interconnects within the insulation system.
No pin-compatible alternative is recorded from the same manufacturer – the 66527 base number defines the footprint and pinout, so a replacement would require a board layout change.