The SP123WF300JT2E Resistor is a high-power, surface-mount, thick-film, 2512-sized, +30O 3 watt resistor with a ±1% tolerance. It is manufactured by Royal Ohm, a renowned supplier of electronic components and resistors. The resistor's lead and mold material are both copper and tin, with a maximum operating temperature of 155°C. It has an excellent thermal response, superior stability, and a low temperature coefficient. The SP123WF300JT2E is ideal for applications with tight tolerance requirements.