Overview
The Motorola 6-5554 390 Ohm 1/2W carbon composition resistor is a classic through-hole component built to exacting standards for dependable performance in vintage and legacy electronics. This NOS (New Old Stock) unit delivers the robust noise characteristics and thermal stability that carbon composition technology is known for, making it an authentic choice for period-correct restoration and repair.
Key Features
- 390 Ohm fixed resistance value
- 1/2W (0.5W) power rating for reliable current handling
- ±10% tolerance suitable for non-critical current-limiting and biasing applications
- Carbon composition construction provides inherent noise immunity
- Axial lead configuration for point-to-point wiring and breadboarding
- New Old Stock condition—tested and fully functional
Technical Specifications
- Resistance: 390 Ω
- Power Rating: 1/2W (0.5W)
- Tolerance: ±10%
- Composition: Carbon Composition
- Termination Style: Axial
- Temperature Coefficient: Typical for carbon composition (~±1000 ppm/°C)
- Operating Temperature Range: −55°C to +125°C
- Manufacturer: Motorola
- Part Number: 6-5554
Typical Applications
Carbon composition resistors like the Motorola 6-5554 are ideally suited for:
- Vintage tube radio and amplifier restoration
- Bias and screen-grid networks in legacy audio equipment
- Current limiting and dropping circuits in heritage test instruments
- Point-to-point wiring in classic electronic assemblies
- LED current limiting in retro LED retrofit projects
- Sensor interface and signal conditioning circuits
Compatibility & Replacements
Compatible With
- Point-to-point wired circuits (breadboards, tag strips, turret boards)
- Tube amplifier bias networks
- Vintage radio and test equipment
- Any circuit requiring a 390 Ω axial through-hole resistor
- Standard 0.125″ lead spacing on PCBs
Replaces / Drop-In Replacement For
- Any equivalent 390 Ω 1/2W ±10% carbon composition resistor
- Original equipment manufacturer specs calling for Motorola 6-5554 or equivalent
- Vintage radio and amplifier original component positions
Works With
- Hand-soldering and wave-soldering processes
- Standard through-hole PCB designs and breadboards
- No special software or communication protocols required
- Compatible with both AC and DC applications within power rating
- Vintage restoration and period-correct repair workflows
