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MIL-PRF-39009-2 Resistors, Fixed, Wire-Wound, \(Power Type, Chassis Mounted\), Nonestablished Reliability, And Established Reliability, Styles Rer40, Rer45, Rer50, And Rer55This specification covers the associated requirements for nonestablished reliability and established reliability styles RER40, RER45, RER50, and RER55 resistors. These resistors are noninductively wound.

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MIL-PRF-39009/2C
3.3 Power rating. The power rating shall be as specified in table II, based on full-load operation at an
ambient temperature of 25°C, when mounted on the chassis specified in 4.4 (see 6.5).
TABLE II. Power rating.
Resistor
Power rating
style
(watts)
RER40
5
RER45
10
RER50
20
RER55
30
3.3.1 Power rating (free air). The free air (resistor not mounted on a chassis) power rating based on full
load operation at 25°C shall be as specified in table III.
TABLE III. Power rating (free air).
Resistor
Power rating
style
(watts)
RER40
3
RER45
6
RER50
8
RER55
10
3.4 Resistance. The minimum and maximum nominal resistance values shall be as specified in
TABLE IV. Minimum and maximum nominal resistance values.
Resistor
Resistance values
style
Minimum
Maximum
Ohms
Ohms
1
1,650
RER40
1
2,800
RER45
1
6,040
RER50
1
19,600
RER55
4. VERIFICATION
4.1 Sampling and inspection. Sampling and inspection shall be in accordance with MIL-PRF-39009
and as specified herein.
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