The 4-1625890-4 is a metal oxide resistor 2W SM M/OX 5% 390R manufactured by TE Connectivity. It is a two-watt resistor with a 5% tolerance (total tolerance of 5%), with a nominal resistance of 390 Ohms. The type is a metal oxide resistor, meaning that its design involves a resistive layer of metal oxide between two electrodes. Metal oxide resistors are reliable, non-inductive, and used for the precise control of current or voltage in applications where more traditional resistors are unsuitable. This particular type of resistor operates at an ambient temperature of -55°C to 110°C and is encased in a flame-retardant and moisture-resistant epoxy coating.