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List of Varieties

Metal Shaft Potentiometers

Type

16mm size

20mm size

27mm size

50mm size

Rotary motor-driven

Series

RK163

RK203/EC20A

RK271

RK501

RK168

Single-shaft

Number of resistor elements

Single/dual

Single

Single/dual/quad

Dual/quad

Dual/quad/5-ganged/6-ganged

Photo

Terminal mounting

Horizontal

Vertical

Horizontal

Fixing method of bushing

Bushing screw clamp

Operating temperature range

−10℃ to ＋70℃

RK203：−40℃ to ＋85℃

EC20A：−30℃ to ＋80℃

−10℃ to ＋70℃

Operating life

15,000 cycles

30,000 cycles

15,000 cycles

Available for automotive use

—

〇

—

—

—

Life cycle (availability)

Electrical

performance

Total resistance

（k Ω）

5, 10, 20, 50,

100, 200

10

5, 10, 20, 50,

100, 250

10, 20, 50, 100

Resistance taper

15A, 1B, 3B, 15C

B

15A, 3B

Rated Power

0.1W

0.05W（15A）

0.05W

0.1W

0.05W

Residual

resistance

R≦10kΩ 20Ω max.

10kΩ＜R≦50kΩ 30Ω max.

50kΩ＜R＜3MΩ

Nominal total resistance of

0.1% or less%

—

R≦10kΩ 20Ω max.

10kΩ＜R＜50kΩ 30Ω max.

50kΩ≦R

Nominal total resistance of

0.1% or less%

—

—

Maximum

attenuation

（Volume control）

5kΩ≦R＜ 10kΩ70dB min.

10kΩ≦R＜ 50kΩ80dB min.

50kΩ≦R＜100kΩ90dB min.

100kΩ≦R

100dB min.

5kΩ≦R＜ 10kΩ70dB min.

10kΩ≦R＜ 50kΩ80dB min.

50kΩ≦R＜100kΩ90dB min.

100kΩ≦R

100dB min.

120dB min.

5kΩ≦R＜ 10kΩ70dB min.

10kΩ≦R＜ 50kΩ80dB min.

50kΩ≦R＜100kΩ90dB min.

100kΩ≦R

100dB min.

Gang error applicable

to Dual-unit parts for

audio volume control

purposes

−40dB to 0dB

3dB max.

—

−70dB to −60dB　3dB max.

−60dB to 0dB　2dB max.

−100dB to 0dB

2dB max.

−60dB to −40dB　5dB max.

−40dB to 0dB　3dB max.

Insulation

resistance

100MΩ min. 500V DC 10MΩ min. 250V DC

100MΩ min. 500V DC

100MΩ min. 250V DC

Voltage proof

500V AC

for 1minute

300V AC

for 1minute

500V AC for 1minute

300V AC

for 1minute

Center-taps

Without

Mechanical

performance

Detent

Without, Center,

21, 31, 41

17

Without, Center,

21, 31, 41

Without

Stopper strength

0.9

0.5

0.9

1.5

0.9

Push-pull strength

100N max.

150N max.

100N max.

Vibration

10 to 55 to 10Hz/min., the amplitude is 1.5mm for all the frequencies,

in the 3 direction of X, Y and Z for 2 hours respectively

Shaft style

Serrated type,

Flat type, Slotted type

Flat type

Slotted type, Flat type

Slotted type

Flat type

Terminal style

Insertion, Lead

Insertion

Attached switch

—

EC20A: Momentary

push switch

—

—

—

Page

332

337

340

344

346

Metal Shaft Potentiometers Soldering Conditions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 349

Potentiometers Cautions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 427

Potentiometers Measurement and Test Methods ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 429

Potentiometers Resistance Taper ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 431

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