The OY390KE is a fixed ceramic resistor from the OY series, providing a resistance of 39Ω with a 10% tolerance. It is rated for 2 watts of power at 70°C and has a maximum working voltage of 400V. This component is engineered to handle high energy events, with a maximum single impulse rating of 80 Joules. Due to its robust construction, it serves as an excellent replacement for 2-watt carbon composition resistors in demanding applications like high-voltage power supplies, R-C snubber circuits, and inrush limiters.