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Bourns 91A1AB28D20L Single-Turn Panel Control
The Bourns 91A1A-B28-D20L is a versatile 5/8" square single-turn panel control designed for precise adjustment in a variety of industrial applications. It offers a broad resistance range, linear and audio tapers, and robust mechanical characteristics. The potentiometer provides virtually infinite electrical circuit isolation and is available with metal or plastic shaft options. Its robust design and RoHS compliance make it suitable for demanding environments. Users should verify actual device performance in their specific applications.
Bourns 91A1AB28D20L Single-Turn Panel Control Specifications:
- Standard Resistance Range: 1 K ohms to 1 megohm (Linear A, B, E, H tapers), 100 ohms to 1 megohm (Linear A, H tapers), 1 K ohms to 1 megohm (Audio C, D, F, G, S, T tapers), 1 K ohms to 1 megohm (Audio C, F tapers)
- Total Resistance Tolerance: 10 % or 20 % (Cermet Element), 5% or 10% (Conductive Plastic Element)
- Independent Linearity: ±5 %
- Absolute Minimum Resistance: 2 ohms maximum
- Effective Electrical Angle: 240 ° ± 5 ° (Linear tapers), 225 ° ± 5 ° (Audio tapers)
- Contact Resistance Variation: ±1 % or 3 ohms (whichever is greater)
- Dielectric Withstanding Voltage: 1,500 VAC minimum (Sea Level), 500 VAC minimum (70,000 Feet)
- Insulation Resistance: 1,000 megohms minimum
- Power Rating: +70 °C Single Section Assembly: 1 watt (Linear), 0.5 watt (Audio), +70 °C Multiple Section Assembly: 0.5 watt/section (Linear), 0.25 watt/section (Audio), +125 °C: 0 watt
- Theoretical Resolution: Essentially infinite
- Operating Temperature Range: -40 °C to +125 °C
- Storage Temperature Range: -55 °C to +125 °C
- Temperature Coefficient: ±1,000 ppm/°C (Linear), ±150 ppm/°C (Audio)
- Vibration: 15 G
- Shock: 30 G
- Load Life: 1,000 hours
- Rotational Life: 100,000 cycles
- Moisture Resistance: ±10 % TRS maximum (Linear), ±5 % TRS maximum (Audio)
- Contact Resistance Variation @ 50,000 cycles: ±2 % (Linear), ±3 % (Audio)
- IP Rating: IP 40
- Moisture Sensitivity Level: 1
- Stop Strength: 45.19 N-cm (1/4” D shaft), 33.89 N-cm (1/8” D shaft)
- Mechanical Angle: 300 ° ±5 °
- Torque Starting: 0.3 max. above average running torque
- Running Torque: 0.21 to 1.06 N-cm (A & R Bushings), 0.14 to 1.06 N-cm (C & U Bushings)
- Mounting Torque: 1.7-2.0 N-m (15-18 lb.-in.) maximum
- Variation: 0.35 N-cm (0.5 oz.-in.) maximum
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Frequently Asked Questions
Where can I buy Bourns 91A1AB28D20L?
You can click on the BUY or RFQ button to purchase 91A1AB28D20L from an authorized Bourns distributor.
How do I troubleshoot issues or seek technical support for part 91A1AB28D20L?
You can download the 91A1AB28D20L datasheet or visit the Bourns website for support.
Who is the manufacturer of 91A1AB28D20L?
Bourns