AHP25W-100RJ is a wire wound, heatsinked resistor manufactured by SR Passives. It has a resistance of 100 ohms, a rated power of 25 watts, a tolerance of ±5%, and temperature coefficient of resistance of 50 parts per million per degree Celsius. The heatsink allows for greater heat dissipation, allowing the resistor to handle higher power with better reliability. The tolerance and temperature coefficient of resistance are also very good, making it highly accurate.