KBCC-225R KB Electronics 230 VAC, thru 3 HP, 180 VDC ARM, SCR Chassis Relay Reversing (9924) Plug-in Horsepower Resistor Required The control must have a Plug-in Horsepower Resistor installed; purchased separately Plug-in Line Fuse Included Fuse is included with the control Plug-in Armature Fuse Available Provisions for mounting the fuse is provided, but the fuse is not included with the control. Plug-in Armature Fuses purchased separately The KB Electronics KBCC chassis controls utilize the KBMM speed control to provide a low-cost, reliable SCR drive. They include all the features of the KBMM plus the Auxiliary Heat Sink and Barrier Terminal Block with AC line and armature fuses. The controls are ruggedly constructed and contain a 5k ohm speed potentiometer. Dimensions (L x W x H approx.): 7.0 x 6.3 x 3.0.