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)

16

Moisture Life

(Method 103)

Resistance change shall

be ± 5% of the Pre-test

value.

Initial resistance shall be measured. Resistors

shall be placed in a chamber at relative humidity

of 90 - 95% at ambient temperature of 40 ± 2°C.

Then DC RCWV shall be applied intermittently

1-1/2 hr. (on), 1/2 hr. (off) for a total of 1,000 hrs.

After removal from the chamber, the resistors shall

be allowed to dry at room ambient for approxi-

mately 1 hr. Final resistance shall be measured.

17

Operating Life

(Method 108)

Resistance change shall

be ± 5% of the Pre-test

value.

Initial resistance shall be measured. Resistors

shall be placed at ambient temperature of 70 ±

3°C. Then DC RCWV shall be applied intermittent-

ly 1-1/2 hr. (on), 1/2 hr. (off) for a total of 1,000 hrs.

After return to room temperature, final resistance

shall be measured.

5.1 Derating Curve

Under ambient temperature in excess of 70°C, the

load shall be derated as shown in the figure below.

5.2 Rated Voltage

Resistors shall have a rated direct current (DC)

continuous working voltage or an approximate sine

wave rootmean square (rms) alternation-current

(AC) continuous working voltage at commercial line

frequency and wave form corresponding to the power

rating, as determined from the following formula:

In no case shall the rated DC or rms AC continuous

working voltage be greater than the applicable

maximum value.

Where,

E =

E = Rated DC or rms AC

continuous working voltage (V)

P = Power rating (W)

R = Nominal resistance (OHM)

100

80

60

40

20

-60 -40 -20

0

40 60 80 100

180

20

Ambient Temperature

(

°C)

0

120 140 160

200

70

6. Marking

The resistors shall be marked with color codes as per EIA-172.

SS-02 R6

6/20/07

3:37 PM

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