Model 591 Modular Potentiometer
Thick-Film Cermet—1/2" square
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Commercial Modular Pot
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Cermet Element
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Smooth Feel
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Temperature Stable
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Robust Construction
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ISO 9001 Certified
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Shaft and Mounting Seals
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Not sealed for board washing
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| Options: |
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Rotary Switches |
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Up to 3 Sections |
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PC Support Mounting Plates |
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Solder hook terminals |
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Electrical Specifications
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Resistance Range
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Linear: 100 ohms to 2.0 megohms
Non-Linear: 250 ohms to 1.0 Megohms
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Resistance Tolerance
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Linear: ±10% Standard to 100K; ±20% over 100K
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End Resistance
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Linear: 4 ohms Max. Each End
Non-Linear: 4 ohms Max. Low Side; 1% Total R High Side
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Linearity
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±5% Independent
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Power Rating
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1 watt @ 70°C Derated Linearly to 0 watts @ 150°C
For Non-Linear Tapers or PC Mount, Derate by 50%
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Electrical Rotation
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295° ±5°
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Effective Rotation
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265° ±5°
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Dynamic Noise
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3% of total Rt Standard Linear
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Maximum Continuous Working Voltage
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350 VAC across End Terminals
(power not to exceed rating)
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Dielectric Withstanding Voltage
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Sea Level: 750 VAC; 70,000 Feet: 350 VAC
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Switch Specifications
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Rotary (AL) Switch: SPST and SPDT: 125mA, 28 VDC (Dry Circuit)
CCW or CW, Rotational Life 25,000 cycles (Rated Load)
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Mechanical Specifications
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Mechanical Rotation
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295° ±5°
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Torque
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Operating: Single Section: .2 to 3.0 oz. in.
Dual Section: .3 to 4.5 oz. in.
Variation in a Control: .5 oz. in.
Center Detent: .6 to 3.0 oz. in.
Stop Strength - 3 in. lbs. min.
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Weight (approx.)
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Single: 0.19 oz.; Dual - 0.27 oz.; Triple - 0.35 oz.
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Marking
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Ink Stamp on Periphery or Rear per EIA Standard
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Construction Materials
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Housing: black molded thermoplastic
Metal bushing and shaft
Metal contact spring wiper
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Environmental Specifications
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Operating Temperature
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-40°C to +150°C
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Storage Temperature
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-55°C to +150°C
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Temperature Cycling
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-40°C to +150°C (3% change in Rt)
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Load Life
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1,000 hrs. Rated Load@70°C
(5% change in Rt)
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Rotational Load Life
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25,000 Cycles (10% change in Rt)
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TCR over Storage Temperature Range
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±150 ppm/°C
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