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Electronic Components - Resistors Military MIL-R-39008 Ordering Code.

Resistor part numbers under MIL-Spec MIL-R-39008.

An example: RCR 20 G514 J S

RCR 20 G 514 J S
| | | | | |
type type
or
style
temperature
characteristic
resistance tolerance failure rate
1 2 3 4 5 6

1. RCR = type:fixed composition resistors, insulated, established reliability

2. Rating (watts at 70 C degree)

  • RCR05 = 1/8 watt
  • RCR07 = 1/4 watt
  • RCR20 = 1/2 watt
  • RCR32 = 1 watt
  • RCR42 = 2 watt

3. Maximum ambient temperature and resistance temperature characteristic (refer to MIL--R-39008 specifications as Applicable)

4. Resistance value: First two digits are significant. The last digit indicates the number of zeros to follow, except below 10 ohms:

  • 101 = 10 with 1 zero = 100 Ohm
  • 102 = 10 with 2 zeros = 1000 Ohm
  • 2R7 = decimal point 2.7 Ohm

The letter "R" is substituted in place of a significant digit to represent the decimal point

5. Tolerance:

  • J = ± 5 %
  • K = ± 10 %
  • - = ± 20 %

7.Failure rate level (at 50% rated wattage expressed in 5/1000 hrs.):

  • M = 1.0 %
  • P = 0.1 %
  • R = 0.01 %
  • S = 0.001 %

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1. Type: Fixed composition resistors, insulated, established reliability
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4. Resistance:
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