Overview
The Motorola 680K ohm 0.5W carbon composition resistor pack 6-6475 is a vintage fixed resistor designed for through-hole mounting in classic electronic equipment and hobbyist builds. With a resistance rating of 680 kilohms and a power dissipation rating of 0.5 watts (1/2 watt), this carbon composition resistor delivers the warm, sonic characteristics preferred in vintage audio amplifiers and analog signal conditioning circuits. The ±10% tolerance provides reliable performance in non-critical applications where moderate precision is acceptable.
Key Features
- Resistance rating: 680 kilohms (680KΩ)
- Power rating: 0.5 watts (1/2 watt)
- Tolerance: ±10%
- Construction: Carbon composition element with tinned copper axial leads
- Mounting style: Axial through-hole
- Vintage Motorola manufacture for authentic restoration and repair
- New in box condition, fully functional
Technical Specifications
Electrical Properties:
- Nominal resistance: 680 kΩ
- Power dissipation: 0.5 W (max)
- Voltage rating: 350 V (typical for 0.5W composition resistors)
- Resistance tolerance: ±10%
- Temperature coefficient: Typical ±1000 ppm/°C for carbon composition
- Operating temperature range: −55°C to +125°C
Physical Properties:
- Body material: Ceramic phenolic (carbon composition)
- Lead type: Tinned copper, axial leads
- Approximate body length: 9.2 mm
- Approximate body diameter: 3.2 mm
- Lead length: Variable, standard through-hole compatible
Typical Applications
- Vintage and tube audio amplifier biasing and filtering
- Analog signal conditioning in classic test equipment
- Timing and RC network circuits
- Voltage divider networks in legacy industrial and radio equipment
- Restoration and repair of 1960s–1980s consumer electronics
- Hobbyist and retro electronics projects requiring authentic component sourcing
Compatibility & Replacements
Compatible With
- All standard through-hole prototyping breadboards and PCBs
- Vintage tube radio and amplifier designs (1960s–1980s)
- General-purpose analog circuits and filter networks
- Audio tone control and biasing networks
- Industrial control and instrumentation circuits of the analog era
Replaces / Drop-In Replacement For
- Other 680KΩ 0.5W composition resistors in vintage equipment (pin-compatible)
- Carbon film 680K 0.5W resistors in non-critical audio and timing circuits
- Original Motorola 6-6475 part number equivalents from Motorola’s vintage inventory
Works With
- Through-hole PCB assembly and hand-soldering techniques
- Vintage audio schematics and tube amplifier designs
- Standard soldering iron and lead-based solder methods
- RoHS-exempt vintage restoration and hobbyist applications
