Allen-Bradley 18? 1/2W 5% Carbon Composition Resistor (RC20GF180J) The Allen-Bradley RC20GF180J is an 18-ohm carbon composition resistor, rated at 1/2 watt with a tolerance of ±5%. Carbon composition resistors are known for their ability to handle high energy pulses and their robust performance in various electronic applications. Key Features Resistance Value: 18 ohms Power Rating: 1/2 watt Tolerance: ±5% Construction: Carbon composition Applications Carbon composition resistors like the RC20GF180J are commonly used in circuits where high energy pulses are present, such as in power supplies, amplifiers, and other electronic devices requiring reliable performance under varying conditions. Considerations Due to their age, some carbon composition resistors may exhibit oxidation on the leads. It’s advisable to clean the leads with a Scotch-Brite pad before soldering to ensure optimal connectivity.