Model A Precision Multi-Turn Potentiometer
1-13/16" Diameter, 10-Turn Wirewound Element
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| Features: |
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10-Turn Wirewound element |
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±3% Resistance Tolerance Standard |
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±0.05% Independent Linearity Standard |
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1/4" Shaft; 3/8" Bushing |
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Up to 3 Gangs |
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| Options: |
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Center Tap |
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Rear Gang Extension |
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External Panel and Shaft Seal Options.
More information |
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Model Styles
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Model A
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1/4" Shaft, 3/8" Bushing |
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Electrical Specifications
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Resistance Range
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10 to 500K Ohms |
Resistance Tolerance
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<100 Ohms = ±5%
≥100 Ohms = ±3%
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Independent Linearity
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±0.25% (Standard); up to ±0.05% available
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Power Rating
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5.0 Watts at 40°C derating to 0 Watts at 85°C
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Input Voltage
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1,000Vdc maximum (not to exceed power rating)
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Dielectric Strength
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1,000V rms
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Insulation Resistance
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1,000 Megohms minimum |
Noise, maximum
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500 Ohms: RT ≤ 2613.7 Ohms
250 Ohms: RT > 2613.7 Ohms |
Actual Electrical Travel
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3600° +4° -0°
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Tap Tolerance
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≤ 20 Ohms = ±3°
< 100 Ohms = ±2°
< 300 Ohms = ±1.5°
≥ 300 Ohms = ±1°
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| End Voltage, maximum |
10 Ohms = 3% of input voltage
25 Ohms = 1.2% of input voltage
50 Ohms = 0.6% of input voltage
≥100 Ohms = 0.25% of input voltage |
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Mechanical Specifications
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Total Mechanical Travel
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3600° +4° -0° |
Number of Gangs
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3 maximum
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Weight
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4.4 oz. Nominal (single gang) |
Static Stop Strength
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550 oz.-in.
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Backlash
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1°
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Panel Nut Tightening Torque
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25 lb.-in. maximum
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Shaft End Play
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.005" maximum |
Shaft Runout, T.I.R.
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.0005" maximum
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Pilot Diameter Runout, T.I.R.
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.002" maximum
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Lateral Runout, T.I.R.
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.003" maximum
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Shaft Radial Play
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.003" maximum
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Start/Run Torque,
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3.0 oz.-in. maximum (per gang) |
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Environmental Specifications (MIL-R-12934)
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Temperature Range
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Static: -65°C to +85°C
Dynamic: -40°C to +85°C
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Temperature Cycling
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5 cycles, -65°C to +85°C (5% ΔR)
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Shock
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100G's, 6ms Sawtooth
(0.1ms discontinuity max.)
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Vibration
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6 hours, 10 to 55 Hz
(5% ΔR, 0.1ms discontinuity max.)
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Moisture Resistance
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Ten 24 hour cycles (3% ΔR)
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High Temp Exposure
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1,000 hours at 85°C (5% ΔR)
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Rotational Load Life
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2 mil. shaft rev. + 900 hrs.
at rated wattage at 40°C (5%ΔR)
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