A 5W2RJ cement resistor is a high-power, wirewound component rated for 5 watts of power dissipation with a resistance of 2.2 ohms (Ω) (denoted by 2R where the 'R' acts as a decimal point) and a ±5% tolerance rating (represented by the letter J).

Specifications and Construction

• Resistance: 2.2 Ohms
• Power Rating: 5 Watts, designed for continuous high-current applications 
• Type: Commonly wirewound cement or metal film, providing excellent thermal stability and low noise
• Tolerance: ±5% typical, some variants at ±1% 
• Temperature Range: -55°C to +155°C, depending on the model 
• Leads: Axial, through-hole, compatible with PCB mounting or chassis installations 
• Physical Size: Approximately 0.88" L × 0.38" W × 0.38" H; size varies slightly among manufacturers 
• Features: Flame proof, pulse-withstanding, and safe operation in surge-prone environments