A 5W10RJ is a wirewound ceramic cement power resistor rated for 5 watts of power dissipation with a resistance value of 10 ohms and a tolerance of ±5% (represented by the letter 'J').

Electrical Specifications

• Resistance Value: 10 ohms 
• Tolerance: ±5% (J code) 
• Power Rating: 5 watts 
• Voltage Rating: 500 V maximum (for axial versions) 
• Temperature Coefficient: ±400 ppm/°C (axial), ±300 ppm/°C (radial) 
• Operating Temperature Range: -55°C to 155°C (axial version), up to 250°C (radial cement-coated version) 
• Construction Type: Wirewound; flameproof, ceramic or cement-coated for durability and thermal stability