The GWK 300 Ni from Vishay is a Power Resistor with Resistance 100 to 43000 ohm, Tolerance ± 5 to 10 %, Power Rating 180 W, Voltage Rating 4000 V, Temperature Operating Range -55 to 350 Degree C. Tags: Screw Mount. More details for GWK 300 Ni can be seen below.