Overview
The MEMCOR R-12-1/2 is a reliable ceramic rheostat designed for panel mounting in industrial and vintage control applications. This 12.5-watt rated component provides smooth resistance adjustment and has been a standard choice for equipment requiring variable load control and circuit tuning. The MEMCOR R-12-1/2 construction emphasizes durability and thermal stability in compact form.
Key Features
- 12.5-watt power rating — handles moderate current loads in control circuits
- Ceramic construction — provides excellent thermal dissipation and stable resistance characteristics
- Panel-mount design — compact 0.885″ depth with threaded bushing for secure installation
- Compact form factor — 1/8″ shaft diameter enables compatibility with standard control knobs and couplings
- Multiple resistance options — available in standard values including 6Ω, 8Ω, and higher resistance ranges
Technical Specifications
- Power Rating: 12.5 watts
- Typical Current Rating: 1.44 amps (varies by resistance value)
- Material: Ceramic
- Mount Type: Panel mount with threaded bushing
- Bushing Length: 0.310″ (7.8 mm)
- Shaft Diameter: 1/8″ (3.1 mm)
- Shaft Length: 0.335″ (8.5 mm)
- Depth: 0.885″ (22.4 mm)
- Height: 0.695″ (17.6 mm)
- Available Resistance Values: 6Ω, 8Ω, 100Ω, 5000Ω (and other standard values)
Typical Applications
- Industrial control circuits requiring load resistance
- Vintage test equipment and laboratory instruments
- Motor speed control and rheostat circuits
- Audio equipment gain and impedance matching
- Power conditioning and load balancing applications
- Replacement component for legacy industrial machinery
Compatibility & Replacements
Compatible With
- Standard panel-mount control applications requiring 12.5-watt rheostats
- Equipment designed for R-type MEMCOR or TRU-OHM branded components
- Systems using 1/8″ shaft diameter variable resistors
- Industrial control circuits with standard bushing size mounting (0.310″ bushing)
Replaces / Drop-In Replacement For
- MEMCOR R-12-1/2 series in various resistance values (6Ω, 8Ω, 100Ω, etc.)
- TRU-OHM R-12-1/2 rheostats (cross-brand compatible)
- Vintage panel-mounted variable resistors with matching mechanical specifications
Works With
- Any legacy industrial or vintage control system requiring a panel-mount rheostat
- Standard control knobs and couplings compatible with 1/8″ shaft equipment
- Resistance control applications in tube-era and solid-state circuits
