SS-02 R6

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Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.

KOA SPEER ELECTRONICS, INC.

5. Characteristics (Continued)

Characteristics

Test Method

No.

Requirement

(MIL-STD 202)

3

4

Voltage Coefficient

from 1k ohms ~

(Method 309)

0 ~ -0.2%/V

Within

± (2% + 0.05 ohm)

Short Time Overload

The resistance shall be measured at one-tenth the

RCWV and at full RCWV. Application of voltages

shall be momentary to minimize heating effects.

The resistance - voltage coefficient shall be

calculated with the following formula:

A well regulated DC or sine wave RMS voltage

2.5 times the RCWV, but not exceeding the limit

values listed in Table 1, shall be applied for 5

seconds. Resistance shall be measured before

and approximately 30 minutes after the application

of the test voltage.

Voltage Coefficient =

(R-r) x 100

Where: R is the resistance at full RCWV

r is the resistance at one-tenth RCWV

Percent Per Volt

r x 0.9 (RCWV)

5

6

Resistance change shall

be ± (1% + 0.05 ohm) of

the Pre-test value, with

no terminal loosening,

and lead-wire break-

down developing.

Resistance change shall

be ± (2% + 0.05 ohm) of

the Pre-test value, with

no terminal loosening

and lead-wire break-

down developing.

Terminal Strength

(Method 211)

Vibration

(Method 201)

Initial resistance shall be measured. The frequency

shall be varied approximately logarithmically

between the nominal limits of 10 to 55 Hertz with

a return sweep to 10 Hertz shall be traversed in

approximately 1 minute. This sweep cycle shall

be performed repeatedly for 2 hours in each three

directions to perpendicular. Final measurements

and examination for mechanical failures shall be

made after the test.

Test Item

Lead wire (D) (mm)

Test

Ø 0.6, 0.7

Ø 0.8

Method

Tensile

10N

20N

30 ± 5 sec

Strength

(1.02kgf)

(2.04kgf)

Bending

0.51kgf

–––––––

5N (0.5kgf)

Strength

–––––––

1.02kgf

10N (1.02kgf)

Initial resistance shall be measured. Resistor leads

shall then be immersed, one at a time for 3.5 ± 0.5

sec. each, in molten solder at +350°C ± 10°C to a

distance of 2 - 2.5mm from the resistor body. Final

resistance shall be measured 2 ± 1 hr. after the

immersions.

Resistance change shall

be ± (2% + 0.05 ohm)

of the Pre-test value with

no mechanical damage

in appearance and

marking.

Resistance to

soldering heat

(Method 210)

7

SS-02 R6

6/20/07

3:37 PM

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