Overview
The Clarostat RA20-LASB101A 100 ohm potentiometer is a precision wire-wound variable resistor engineered for demanding industrial control applications. Built to MIL-R-19 specifications, this rotary potentiometer delivers stable, adjustable resistance across a 100 ohm range. Its locking shaft design prevents accidental adjustment, making it ideal for factory automation, test equipment, laboratory instruments, and process control systems where reliability and repeatability are critical.
Key Features
- 100 Ohm Resistance with ±10% tolerance
- Linear Taper wire-wound element for smooth, predictable resistance curve
- Locking Shaft (1/4″ diameter, 5/8″ length) prevents unintended rotation
- 2-Watt Power Rating at 40°C, derated to 0W at 105°C
- 25,000 Cycle Rotation Life rated for long service intervals
- MIL-R-19 Certified—military-grade performance standard
- 300° mechanical rotation range with 0.5 to 6 oz/in operating torque
Technical Specifications
Electrical:
- Resistance: 100 Ohm (linear taper)
- Tolerance: ±10%
- Power Rating: 2W @ 40°C (derated at higher temps)
- Maximum Operating Voltage: 310V (subject to power rating)
- Insulation Resistance: 100 MΩ minimum
- Dielectric Strength: 1,000V AC for 60 seconds
Mechanical:
- Rotation: 300° mechanical range
- Operating Torque: 0.5 to 6 oz/in
- Rotation Life: 25,000 cycles
- Shaft: 1/4″ diameter × 5/8″ length (including bushing)
- Element Type: Wire wound
Typical Applications
The RA20-LASB101A suits applications including:
- Feedback resistors in closed-loop control circuits
- Calibration and trimming in laboratory instruments
- Voltage dividers and bias networks
- Industrial test and measurement equipment
- Factory automation and motor control systems
- Audio and communications equipment
Compatibility & Replacements
Compatible With
- Industrial PLC systems and programmable controllers
- Analog input modules requiring variable resistor feedback
- Process control instruments and data acquisition systems
- Test and measurement equipment (oscilloscopes, analyzers, power supplies)
- Audio frequency and RF equipment
Replaces / Drop-In Replacement For
The RA20-LASB101A directly replaces other Clarostat RA20 series 100-ohm potentiometers with matching specifications. Verify exact model compatibility with your system integrator before ordering, as similar-numbered models may have different electrical or mechanical parameters.
Works With
- MIL-R-19 qualified component ecosystems
- Standard potentiometer mounting bushings (3/8″ × 32 NEF-2A compatible)
- Analog sensing and control circuits requiring linear resistance curves
- Industrial panel-mount and chassis-mount applications
