Velleman NC3FDL1 - Manual (Page 2)

Contact surface: gal 2 µm Ag or gal 0.2 µm Au hard alloy over 2 µm Ni
Latch lock & spring: CK 67 steel, treated
Environmental
Temperature range: -30° C to + 80° C
Flammability: UL 94HB
Solderability: complies with IEC 68-2-20
Compatibility:
PCB versions (4 & 5 pole):
horizontal PCB mounting, fastening by chassis mounting holes with M3 threads or by self tapping
PLASTITE®* screws with thread 2.9x1.06 (tri-rondular) direct to PCB.