14S, 17S, 18S

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Revision: 26-Jul-2021

1

Document Number: 68017

For technical questions, contact: sfer@vishay.com

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Multi-Turn 1/4" (6.35 mm) Square Wirewound Trimmers

APPLICATIONS

Wirewound trimmers are particularly useful in those

applications where any combination of high power, low

temperature coefficient of resistance and/or excellent long

term life stability are important design considerations.

MECHANICAL SPECIFICATIONS

Operating torque: 3 oz.-inches maximum, 17S and 18S,

5 oz.-inches maximum, 14S

Rotation: clutch stop, wiper idles

Weight: 0.935 g maximum

Resistive element: nickel chromium

Rotational life: 200 cycles minimum

Terminal strength: 2 lbs for 10 s

FEATURES

• Precious metal wiper

• 0.25 W to +85 °C

• TCR < 50 ppm/°C

• Solderable leads

• Special configurations available

• Military quality at affordable prices

ENVIRONMENTAL SPECIFICATIONS

Temperature limits: -65 °C to +175 °C

Sealing: fully sealed case (non-hermetic)

Note

(1) Other resistances available upon request

ELECTRICAL SPECIFICATIONS

Electrical travel

22 turns ± 4 turns

Resistance range

10

Ω to 5 kΩ (extended range

available in non MIL-SPEC product)

Resistance tolerance

± 5 % standard

Temperature

coefficient

(-65 °C to +150 °C)

± 50 ppm/°C

Power rating

0.5 W at +85 °C derated to 0 W at

+150 °C, these specifications exceed

MIL-SPEC

End resistance

1

Ω or 2 %, whichever is greater

Equivalent noise

resistance (ENR)

100

Ω maximum

Dielectric (DWV)

1000 VAC at atmospheric pressure,

these specifications exceed

MIL-SPEC

Insulation resistance

> 100 000 M

Ω (500 VDC), these

specifications exceed MIL-SPEC

STANDARD RESISTANCE VALUES

RESISTANCE (1)

(

Ω)

NOMINAL RESOLUTION

(%)

10

1.65

20

1.35

50

1.13

100

0.82

200

0.62

500

0.62

1K

0.49

2K

0.34

5K

0.27

10K

0.21

20K

0.17

25K

0.16

CIRCUIT DIAGRAM

1

2

3

CW

GLOBAL PART NUMBER INFORMATION

New Global Part Numbering: 14S500RB (preferred part number format)

GLOBAL MODEL

TYPE

RESISTANCE VALUE

PACKAGING

14 = side adjustment screw

17 = top adjustment screw

18 = side adjustment screw

/ = continuous rotation

S = clutch stop

R = decimal

K = thousand

100R = 100

Ω

5K00 = 5 k

Ω

B = bulk

Historical Part Numbering: 14s501 (will continue to be accepted)

14

s

501

HISTORICAL MODEL

TYPE

RESISTANCE VALUE

S5

0

R

B

0

14