... /without light; 2) 2A,12VDC;T125,5E4; Anti-vandal metal Button Switch 12mm,16mm,19mm in diameter : 1, plane & Arc buttons;2 ... , ON-OFF,momentary-on;3,normal close, when push open;4,ecifications :1)Contact Resistance ... ≤20mΩ 2)Insulation Resistance ≥100MΩ ,at 500 VDC 3)Dielectric Strength 1000VAC/ 1minute 4)Electrical Life ≥50000 cycles 5 ...