"Ratings: 1 AMP @ 120 VAC 1 AMP @ 28 VDC Storage: Normal shelf type storage, temperature between -38°F and 105°F Installation: Mount on ½\" shaft, tighten setscrew, route wire to avoid physical damage to wires. Connect wires by color code. Black - common, red - normally open, blue - normally closed. Apply the switch within the rated voltage and currents. The unit contains a small amount of mercury. If the switch fails, please return in to MDI or dispose of it properly."