Overview
The TRW RC20 is a carbon composition fixed resistor with a resistance value of 39K Ohm and a power rating of 0.5W. This classic resistor type is widely used in vintage audio equipment, test instruments, and general-purpose electronic circuits where cost-effective, reliable resistance is required. The RC20 series features standard axial lead construction and ±10% tolerance, making it suitable for applications that do not require precision tolerances.
Key Features
- Carbon composition construction for stable performance and minimal noise in audio circuits
- 0.5W power rating supports low to moderate current applications
- ±10% tolerance provides adequate accuracy for general-purpose use
- Axial lead configuration enables straightforward PCB insertion and hand-wiring
- Box of 50 units reduces unit cost and eliminates frequent reordering
- RoHS-compliant where applicable; suitable for replacement and new-build projects
Technical Specifications
- Resistance Value: 39,000 Ohm (39K Ω)
- Tolerance: ±10%
- Power Rating: 0.5W (500mW)
- Construction Type: Carbon Composition
- Lead Type: Axial
- Number of Leads: 2
- Operating Temperature Range: −55°C to +155°C (typical for carbon composition)
- Packaging: Box of 50 units
Typical Applications
- Audio amplifier biasing and coupling networks
- Vintage radio and tube equipment restoration and repair
- Test instrument input networks and measurement circuits
- General-purpose electronic project prototyping
- Educational electronics labs and training kits
- Hobbyist and DIY electronics builds requiring bulk resistor stock
Compatibility & Replacements
Compatible With
- Any circuit requiring a 39K Ohm fixed resistor rated for 0.5W or less power dissipation
- Breadboards and perf boards for prototyping and experimentation
- Vintage and modern PCB designs calling for carbon composition resistors
Replaces / Drop-In Replacement For
- Other TRW RC20 39K Ohm 0.5W carbon composition resistor batches and reels
- Generic 39K Ohm 0.5W carbon composition resistors from equivalent manufacturers
Works With
- PCB soldering processes (wave, reflow, and hand-soldering compatible)
- Standard resistor color code reading and circuit documentation
- Multimeters and ohmmeter verification of resistance value
