Nidec Copal JP-30B Single-turn Cerment Potentiometer

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.


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.


  • Cost effective (In house comparison)
  • High resolution (Essentially infinite)
  • RoHS compliant


Resistance torelance± 2%
ResolutionEssentially infinite
Independent linearity± 0.5%
Effective electrical angle300° ± 1°
Mechanical angle300° +20°-0°
Power rating (at 40 °C)1.5W
Dielectric strength1000 Vrms 1 min
Insulation resistance1000 MΩ minimum(at DC500 V)
Rotational torque2.94 ~ 14.7 {30 ~ 150} mN·m {gf·cm} maximum
Stop strength0.490 {5} N·m {kgf·cm}maximum
Peak noise2 % or 100 Ω, whichever is greater
Temp. coefficient of resistance± 150 10-6/°C
Operating temp. range− 55 ~ 85°C
Maximum rotational speed150 r/min
Rotational life10 万サイクル
Net weightApprox. 26g
Strength of tighten screw0.98 N·m {10 kgf·cm} maximum
  • Perform soldering of the terminals at 380 °C for no more three seconds, and avoid applying excess heat. Also, avoid applying outside force to the terminals.
    In case of using multiturn potentiometers, when rotating the shaft to the mechanical limit, apply torque below the strength of the stopper. Also, give due consideration to thrust and radial loading.

Nominal Resistance Value • Rated Voltage • Rated Current

Nominal resistance valueRated voltageRated current
500Ω27.3 V54.7 mA
1 kΩ38.7 V38.7 mA
2 kΩ54.7 V27.3 mA
5 kΩ86.6 V17.3 mA
10kΩ122 V12.2 mA
20 kΩ173 V8.66 mA
50 kΩ273 V5.47 mA
100 kΩ387 V3.87 mA


Part Number Designation

JP – 30B-1K

Series name

JP-30B:For manual setting

Nominal resistance value(Ω)

500, 1 k, 2 k, 5 k,

10 k, 20 k, 50 k, 100 k

List of Part Numbers

Part numberNominal resistance value
JP-30B 500500 Ω
JP-30B 1 k1 kΩ
JP-30B 2 k2 kΩ
JP-30B 5 k5 kΩ
JP-30B 10 k10 kΩ
JP-30B 20 k20 kΩ
JP-30B 50 k50 kΩ
JP-30B 100 k100 kΩ

Additional Information

Rated Power Derating Curve


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