The 300D is rugged, reliable and very economical for precise process control. The fully enclosed 300D can be either mounted directly to the surface or DIN rail mounted. The 300D has a 10Amp NO relay contact. Switching 2400W at 240Vac, single phase allows the 300 Series to directly control a small strip or cartridge heater... eliminating the expense and the cost of buying and wiring a contactor.