Overview
The Allen-Bradley RC20GF3R0J is a fixed carbon composition resistor engineered for industrial automation, control systems, and equipment repair. This 3Ω 1/2W component features a ±5% tolerance and is constructed using hot-molded carbon composite technology, delivering the durability and stability required in challenging electrical environments. Supplied new in box as a lot of 50 units, making it ideal for system integrators, maintenance technicians, and controls engineers stocking spare components.
Key Features
- Resistance Value: 3 ohms (decoded from 3R0 in part number)
- Power Rating: 1/2 watt (500 mW)
- Tolerance: ±5% (J-grade per MIL standards)
- Construction: Hot-molded carbon composite with oxygen-free copper leads
- Non-magnetic, non-inductive design suitable for sensitive analog circuits
- Bulk Supply: Lot of 50 new components for economies of scale
Technical Specifications
- Nominal Resistance: 3 Ω
- Tolerance Class: ±5%
- Power Rating (25°C): 0.5 W
- Operating Temperature Range: –55°C to +70°C
- Lead Material: Oxygen-free copper
- Component Type: Axial carbon composition
- Quantity per Lot: 50 units
- Condition: New in box
- Standards Compliance: MIL-R-11, MIL-R-39008
Typical Applications
Allen-Bradley carbon composition resistors are widely used in:
- Industrial control circuits and PLC termination networks
- Analog signal conditioning and measurement circuits
- Precision current-limiting applications in low-power circuits
- Equipment repair and component replacement in legacy systems
- Audio and instrumentation electronics requiring low-noise performance
Compatibility & Replacements
The RC20GF3R0J is a standard MIL-spec carbon composition resistor. While modern thin-film and metal-film resistors often replace carbon composition types in new designs, these Allen-Bradley components remain critical for maintaining equipment compatibility and performance in systems originally specified with carbon composition resistors. Substitution should only be considered if circuit designers confirm tolerance and temperature coefficient requirements are met by alternative types. This lot of 50 new units ensures availability for preventive maintenance and warranty repairs without extended lead times.
