Overview
The Clarostat RA20LASB101A 100 ohm potentiometer is a precision linear taper variable resistor engineered to MIL-R-19 military specifications. Manufactured by Clarostat (part of Honeywell’s sensing division), this unit delivers consistent performance in critical industrial, aerospace, and test equipment applications. The 100 ohm resistance with 2-watt power rating makes it suitable for voltage dividers, gain adjustment, and feedback circuits requiring reliability and repeatability.
Key Features
- Wire-wound linear taper element — ensures smooth, predictable resistance change across full rotation
- Locking shaft design — prevents accidental movement and maintains set position
- 300-degree mechanical rotation — full adjustment range with 25,000-cycle life rating
- MIL-R-19 certified — meets military-grade performance and durability standards
- Low operating torque — 0.5 to 6 oz/in provides smooth, responsive control without excessive force
Technical Specifications
- Resistance: 100 Ω (±10% tolerance)
- Power Rating: 2 watts at 40°C (derated to 0W at 105°C)
- Insulation Resistance: 100 MΩ minimum
- Dielectric Strength: 1,000 V AC for 60 seconds at atmospheric pressure
- Operating Voltage: 310V maximum (subject to power rating)
- Taper: Linear
- Element Type: Wire-wound
- Mechanical Rotation: 300°
- Operating Torque: 0.5–6 oz/in
- Rotation Life: 25,000 cycles
- Shaft Diameter: 1/4″
- Shaft Length: 5/8″ (including bushing)
- Certification: MIL-R-19
Typical Applications
The Clarostat RA20LASB101A excels in demanding environments where precision and reliability are non-negotiable:
- Aerospace and defense instrumentation — altitude control, trim adjustment, navigation feedback
- Industrial test equipment — oscilloscope gain, spectrum analyzer calibration, function generator tuning
- Audio and broadcast equipment — level control, impedance matching, network balancing
- Analog circuit design — feedback networks, compensation circuits, calibration potentiometers
- Temperature and environmental monitoring — transducer gain adjustment, sensor compensation
Compatibility & Replacements
Compatible With
- Analog voltage divider circuits requiring 100 ohm impedance
- Industrial control systems operating at up to 310V AC
- Feedback and adjustment applications in test and measurement equipment
- Military and aerospace equipment certified to MIL specifications
- Any application requiring ±10% tolerance 2-watt wirewound resistive element
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The Clarostat RA20LASB101A is a direct replacement for identical Clarostat 100 ohm linear potentiometers with the same MIL-R-19 certification and wire-wound element. Part number 140-6738 is an alternate designation for this unit.
Works With
- Analog voltage measurement and control circuits
- Instrumentation requiring potentiometric feedback
- Manual adjustment and calibration stations
- Analog-to-digital conversion systems requiring reference impedance
- Legacy and military-spec equipment requiring MIL-R-19 compliance
