AUcontrols.

Mod. ASC2-0.5, Open Chassis. 

DC Motor Speed Controller for: 1/2 HP DC Motor

Output: 0 ~ 180 VDC - 4 Amps., Field 100/200 VDC @ 1 Amp.

Input: 208 ~ 240 VAC, 50/60 Hz. Single Phase.

Controller dimensions: 4" X 4" X 1.5"

1 Year warranty.