14S, 17S, 18S

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Revision: 26-Jul-2021

2

Document Number: 68017

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Notes

(1) Numbers in parenthesis refer to test method MIL-STD-202 as modified by the detail specification

(2) For values below 100

Ω, add 0.05 Ω to the allowable change

(3) The referenced tests also require that setting stability change shall not exceed ± 1.0 % plus the specified maximum resolution and operating

torque shall not exceed 150 % of the specified maximum

DIMENSIONS 1/4" (6.35 mm) SQUARE in inches (millimeters)

ENVIRONMENTAL PERFORMANCE

TEST (1)

CONDITIONS

MIL-R-27208

REQUIREMENT

TYPICAL

CHANGE

Thermal shock

(107)

5 cycles, -55 °C to +125 °C

ΔR ≤ 1.0 % (2)

ΔR < 0.02 %

Low temperature operation

1 h storage, 45 min rated power at -55 °C

ΔR ≤ 1.0 % (2)(3)

ΔR < 0.01 %

High temperature exposure

250 h, no load at +150 °C

ΔR ≤ 1.0 % (2)(3)

ΔR < 0.03 %

Moisture resistance

(106)

240 h at rated power with humidity ranging

from 80 % RH to 98 % RH

ΔR ≤ 1.0 % (2)

ΔR < 0.02 %

Resistance to soldering heat

(210)

+350 °C for 3 s

ΔR ≤ 1.0 % (2)

ΔR < 0.01 %

Shock

(213)

18 shocks, 100 g, 6 ms, sawtooth, 3 axes

ΔR ≤ 1.0 % (2)(3)

ΔR < 0.07 %

Vibration

(204)

10 Hz to 2000 Hz, 20 g, 12 h, 3 axes

ΔR ≤ 1.0 % (2)(3)

ΔR < 0.02 %

Rotational life

200 cycles

ΔR ≤ 2.0 %

ΔR < 0.04 %

Load life

(108)

1000 h at rated power at +85 °C

ΔR ≤ 2.0 %

ΔR < 0.12 %

DERATING

W Lead Style - 17S

12 3

0.030 ± 0.010

(0.762 ± 0.254)

0.100 ± 0.005

(2.54 ± 0.127)

0.100 ± 0.005

(2.54 ± 0.127)

0.038 ± 0.005

(0.965 ± 0.127)

0.016 ± 0.001

(0.406 ± 0.025)

Dia.

0.020 ± 0.003

(0.508 ± 0.076)

0.045 ± 0.005

(1.14 ± 0.127)

0.172 (4.37)

Min.

0.020 ± 0.003

(0.508 ± 0.076)

0.260 ± 0.005

(6.60 ± 0.127)

0.211 ± 0.005

(5.36 ± 0.127)

0.120 ± 0.005

(3.05 ± 0.127)

0.062 ± 0.005

(1.57 ± 0.127)

Dia.

0.160 ± 0.010

(4.06 ± 0.254)

X Lead Style - 18S

0.100 ± 0.005

(2.54 ± 0.127)

0.038 ± 0.005

(0.965 ± 0.127)

0.100 ± 0.005

(2.54 ± 0.127)

0.030 ± 0.010

(0.762 ± 0.254)

0.211 ± 0.005

(5.36 ± 0.127)

0.062 ± 0.005

(1.57 ± 0.127)

0.120 ± 0.005

(3.05 ± 0.127)

0.160 ± 0.010

(0.406 ± 0.254)

0.172 (4.37)

Min.

0.260 ± 0.005

(6.60 ± 0.127)

0.045 ± 0.005

(1.14 ± 0.127)

0.016 ± 0.001

(0.406 ± 0.025)

Dia.

0.020 ± 0.003

(0.508 ± 0.076)

0.020 ± 0.003

(0.508 ± 0.076)

X Lead Style - 14S

0.062 ± 0.002

(1.57 ± 0.051)

Dia.

0.120 ± 0.010

(3.05 ± 0.254)

0.156 ± 0.010

(3.96 ± 0.254)

0.038

(0.965)

0.100

(2.54)

0.014 (0.356)

Min.

0.172 (4.37)

Min.

0.020

(0.508)

0.210

(5.33)

0.013 ± 0.001

(0.330 ± 0.025)

Dia.

0.050 ± 0.010

(1.27 ± 0.254)

0.250 ± 0.015

(6.35 ± 0.381)

3

2

1

0

25

50

75 85 100

125

150

175

0.50

0.40

0.30

0.20

0.10

AMBIENT TEMPERATURE °C