Nidec Copal M Series Multi-turn Wirewound Potentiometer

Precision wire winding technology has been used to achieve low noise and long life. Wirewound types include the multiturn M series for use in setting.


Potentiometers are displacement sensors that produce electrical output (voltage) in proportion to the mechanical displacement. They are basically composed of a resistor and a wiper (brush), with the mechanical displacement of the resistor relative to the wiper being accurately converted into electrical voltage output. A voltage is applied to both ends of the resistor, and the wiper is moved. The displacement is measured by the voltage between one terminal of the resistor and the wiper. Looking at the component structurally, we can see the following: (Fig. 1) Further, the following formulas apply to the voltage output


Nidec Potentiometer

Model of potentiometer

Wirewound Type

Precision wire winding technology has been used to achieve low noise and long life. Wirewound types include the single turn J series for use in servo drives and the multiturn M series for use in setting.

Conductive Plastic Type

Special film resistors and original contact construction provide long life, with degradation that is theoretically infinitely small. Conductive plastic types include single turn types and linear types, both for use in servo drives.

Cerment Type

The use of cermet resistors allows low price. The degradation is theoretically infinitely small. Cermet tyeps are single turn for use in servo drives and for setting.

Optical Contactless Type

Contactless configuration offers much longer life and lower noise compared with the conventional contact method.


Nidec Copal

Nidec Copal

NIDEC COPAL ELECTRONICS was established in April 1967 in Japan as a specialty manufacturer of electronics components. The company's philosophy remains unchanged - to be a supplier of high quality products while offering competitive prices. NIDEC COPAL ELECTRONICS began by developing a wirewound trimmer. This product was enthusiastically received by many sectors in the industry. The initial success of the trimmers laid the groundwork for future development of a wide selection of manufactured products that combined electronics at the start of the electronics revolution.

Later, robust sales of cermet trimmers led to the company's remarkable expansion. Further development efforts led to the release of a succession of new product lines. These included a wide range of motors, encoders, switches and pressure sensors.


  • Line-up includes products ranging from 3 to 10 turns
  • Cost effective (M-22E10) in house comparison
  • Dial can be attached (M-22 series only)
  • RoHS compliant


ItemM-13 seriesM-22 series
Resistance torelance± 5%
Independent linearity± 0.5%± 0.2
End resistance, maximum2 % or 4 Ω, whichever is greater0.5 % or 1 Ω, whichever is greater
Effective electrical angle1080°1800°3600°
Mechanical angle1080° ±10°1800° ±10°3600° +10°
Power rating0.75W1W2W
Dielectric strength1000 Vrms 1 min
Insulation resistance1000 MΩ minimum(at DC 500 V)
Rotational torque14.7 {150}mN·m {gf·cm} maximum9.81 {100}mN·m {gf·cm} maximum
Strength of tighten screw0.98 {10}N·m {kgf·cm} maximumM-22E10-000M-22E10-050
0.784 {8} N·m {kgf·cm} maximum0.588 {6} N·m {kgf·cm} maximum
Stop strength0.147 {1.5}N·m {kgf·cm} maximum0.196 {2}N·m {kgf·cm} maximum
Peak noise20 Ω maximum(at 4 min-1)
Temp. coefficient of resistance± 50ppm/°C
Operating temp. range− 40 ~ 85°C
Rotational life15000 cycles25000 cycles
Net weightApprox. 7gApprox. 19gApprox. 17g
Protection gradeIP40

Nominal Resistance • Resolution • Rated Voltage • Rated Current

Nominal resistance value(Ω)Resolution(%)Rated voltage(V)Rated current(mA)
200➡ 0.1540.095➡ 12.214.1➡ 61.570.9
1 k0.0720.05727.431.628.531.6
2 k0.0560.04738.744.719.422.4
5 k0.0690.05161.270.712.314.1
10 k0.0530.03986.6100.08.710.0
20 k0.0380.032122.5141.46.17.1
Nominal resistance value(Ω)Resolution(%)Rated voltage(V)Rated current(mA)
1 k0.02544.744.7
2 k0.02063.231.6
5 k0.014100.020.0
20 k0.014200.110.1
50 k0.011316.2200.06.3
100 k➡0.009➡450.0➡200.0➡4.47

The products indicated by ➡ mark are manufactured upon receipt of order basis.


Part Number Designation

M – 1303100

Series name

M-1303, M-1305, M-22S10

M-22E10, M-22E10-050

Nominal resistance value(Ω)

100, 200, 500, 1 k, 2 k,

5 k, 10 k, 20 k, 50 k

List of Part Numbers

Part numberNo. of turnNominal resistance value (Ω)
M-1303 [Resistance value]※ 13 turns100, 200, 500, 1 k, 2 k, 5 k,10 k, 20 k
M-1305 [Resistance value]5 turns100, 200, 500, 1 k, 2 k, 5 k,10 k, 20 k
M-22S10 [Resistance value]10 turns100, 200, 500, 1 k, 2 k, 5 k,10 k, 20 k, 50 k
M-22E10 [Resistance value] M-22E10-050 [Resistance value]※ 210 turns100, 200, 500, 1 k, 2 k, 5 k,10 k, 20 k, 50 k

※1:M-1303 200 Ω model is manufactured upon receipt of order basis.※ 2:For M-22E10 series, plese refer to the drawing for its mount size.

Additional Information

Rated Power Derating Curve


◆M-1303 (3 turns)/M-1305 (5 turns)

◆M-22S10 (10 turns)

◆M-22E10 (10 turns)

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