25W Wirewound Resistor - TOOGOO(R)Chasis Mounted Aluminum Housed 25W 3.9 Ohm 5% Wirewound Resistors Gold Product Name : Aluminum Resistor Resistance Value : 3.9 Ohm; Power Rating : 25W Stable performance, extensive resistance, small size, high operating temperature and high ultimate voltage. Widely used in power supply, transducer, elevator, arena audio and high requirement equipment industry. Aluminum housing for heat dissipation, suitable for cooling plate installation, can be used in atrocious environment.