Omeg P20 potentiometer data

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OMEG P20 POTENTIOMETER DATA

This page provides the electrical and mechanical specification for the P20 product range of Omeg rotary potentiometers.

The electrical specification is split into unique and common attributes to highlight the difference between the 16mm and 20mm size of potentiometer.

P20 Mechanical specification
Electrical specification - Unique to P20 potentiometers
- Effective rotation
- Rated power dissipation
- Limiting element voltage
- Insulating Voltage
Electrical specification - Common to E16, P16 and P20 potentiometers
- Insulation Resistance
- Rated Resistance
- Tolerance on Rated Resistance
- Resistance Laws (A=Linear, B=Log, C=Reverse/Anti Log)
- Linearity
- Matching Tolerance (For Tandem Stereo Potentiometers)
- Operating Temperature
- Temperature Coefficient of Resistance

Go to P20 Potentiometer Dimensions for the potentiometer bush and spindle dimensions; and
go to P20 Potentiometer Types to select the unswitched model and terminal arrangement to suit your requirements.

P20 MECHANICAL SPECIFICATION

Operating Torque: 0.4 - 1.5 Ncm
Permissable Axial Spindle Load: 100 N (5 Sec. maximum)
Permissable Torque at End Stop: 80 Ncm
Rotation angle: 300° ±5°
Click Stop facility available on certain models

ELECTRICAL SPECIFICATION - UNIQUE TO P20 POTENTIOMETERS

Effective rotation:

Without a switch: 267° nominal
With rotary switch: 232° nominal

Rated Power Dissipation @40°C for 20mm potentiometers:

0.4W linear law
0.2W non linear law

Limiting Element Voltage: 500 V DC for 20mm potentiometers

Insulating Voltage: 1000 V AC for 20mm potentiometers

ELECTRICAL SPECIFICATION - COMMON TO E16, P16 AND P20 POTENTIOMETERS

Insulation Resistance: >= 4 Gohms

Rated Resistance: E3 Series

Optional: E6 Series
Linear Law: 1K - 1M
Non linear Law: 4K7 - 470K

Tolerance on Rated Resistance: ± 20%

Optional Tolerance on 1K - 1M: ± 10%

Resistance Laws:

Linear: A
Non linear: B (Log) or C (Reverse/Anti Log)
Other laws: Please refer to Sales office

resistance law C (Reverse/Anti Log) curve

Linearity

As a basis of assessing Linearity Tolerance the independent method is the most practical, permitting as it does, the reference curve to be aligned as near as possible to the actual output curve. This avoids the use of the theoretical starting and finishing points, it is normal for the customer to realign the achieved curve with series trimmers at each end of the device if required.
Linearity Tolerance is 4% over the Nominal Resistance range of 1K0 to 1M0. The Linearity Tolerance is measured on at least 70% of the effective rotation range.

Note. In the case of Terminal and Zero-based linearity, both present constraints which increase the manufacturing difficulty and in consequence have an adverse effect on the product's price and availability.

Matching Tolerance (For Tandem Stereo Potentiometers)

Tandem Potentiometers have two identical resistor units with the same variation law. The mismatching of the two resistor units, expressed in dB, is measured by the difference between the attenuations introduced by each resistor unit at various points of travel.

Law A: 4 dB at Attenuation range 0 - 20 dB
Law B and C: 3 dB at Attenuation range 0 - 20 dB

Operating Temperature: -25°C to +70°C

Temperature Coefficient of Resistance: +300 -500 ppm

Life: >= 20,000 cycles

This information is supplied in good faith but the customer is politely reminded that it is their responsibility to check the suitability of our products for their particular application. Please note that all dimensions are for reference purposes only and, as it is the Company's policy to continuously improve our products, we reserve the right to incorporate changes without notice.