A 5W20RJ cement resistor is a 5-watt, 20-ohm wirewound power component with a 5% tolerance rating. It features a flame-retardant ceramic and cement casing designed to handle high heat dissipation, electrical stability, and moisture resistance in electronic circuits

Electrical Characteristics

• Resistance: 20 Ohms (20R, "RJ" typically designates 5% tolerance) 
• Tolerance: ±5% indicates the resistance can vary within 5% of 20Ω 
• Power Rating: 5 Watts, suitable for applications requiring high power dissipation 
• Type: Wirewound, offering high precision and stability under pulse loads 
• Temperature Coefficient: Approximately ±300 ppm/°C for NEOLM series variants, indicating how resistance changes with temperature 
• Pulse Withstanding Capability: Can handle transient current spikes without damage, making it suitable for power circuits