FRN01WK022JA10 is a Royal Ohm resistor. It is a wire-wound, 1-ohm, 5%, 2-watt resistor. It has a 22mm x 10mm rectangular package and is rated for 1A continuous temperature current, - 55° C to +150° C operating temperature range, flame-resistant insulation, and a 1,000V dielectric. Its construction includes a Teflon-insulated copper ribbon, ceramic substrate, and high-grade printed ceramic layers, which provide excellent heat dissipating and mechanical strength.