Axial Precision Wirewound Resistors
(500 & EC Series)
FEATURES
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PERCENT OF RATED POWER |
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500 and EC Series resistors must be derated for tolerances below 0.1%, and for elevated temperatures. Use the curve for the desired tolerance, and, knowing the maximum ambient temperature during use, determine the maximum allowed percentage of rated power from the graph. |
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| Axial Lead Resistors - 500 Series | |||||||||
| KRL Style |
MIL-R-93 |
MIL-R-39005 |
Dimensions |
Power in Watts |
Maximum Voltage |
Maximum Resistance |
|||
Length ±.015 |
Diameter ±.015 |
Lead AWG |
MIL 125°C |
COMM 125°C |
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| †533 | 0.260 |
0.100 |
24 |
0.05 |
0.1 |
100 |
150K |
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| †534 | 0.300 |
0.100 |
22 |
0.05 |
0.1 |
100 |
150K |
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| †535 | 0.250 |
0.125 |
22 |
0.065 |
0.125 |
150 |
300K |
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| 536 | 0.312 |
0.125 |
22 |
0.075 |
0.15 |
200 |
400K |
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| †537 | 0.375 |
0.125 |
22 |
0.1 |
0.2 |
200 |
500K |
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| †538 | 0.375 |
0.187 |
22 |
0.125 |
0.25 |
300 |
1 Meg |
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| 539 | 0.250 |
0.187 |
22 |
0.115 |
0.225 |
250 |
550K |
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| †540 | RBR-74 |
0.500 |
0.187 |
22 |
0.175 |
0.35 |
300 |
1.5 Meg |
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| 550 | RBR-75 |
0.295 |
0.250 |
22 |
0.125 |
0.25 |
200 |
1.5 Meg |
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| †555 | RB-56 |
RBR-56 |
0.375 |
0.250 |
20 |
0.175 |
0.35 |
300 |
1.5 Meg |
| †560 | RB-55 |
RBR-55 |
0.500 |
0.250 |
20 |
0.25 |
0.5 |
400 |
2 Meg |
| †565 | RB-54 |
RBR-54 |
0.750 |
0.250 |
20 |
.375 |
0.75 |
500 |
3.5 Meg |
| 570 | RB-53 |
RBR-53 |
0.750 |
0.375 |
20 |
0.45 |
0.9 |
600 |
4 Meg |
| 575 | RB-52 |
RBR-52 |
1.000 |
0.375 |
20 |
0.75 |
1.5 |
750 |
5 Meg |
| 578 | 0.500 |
0.500 |
20 |
0.33 |
0.66 |
400 |
2 Meg |
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| 580 | RB-57 |
RBR-57 |
1.000 |
0.500 |
20 |
0.85 |
1.75 |
850 |
10 Meg |
| 585 | RB-58 |
1.500 |
0.500 |
20 |
1 |
2 |
1.5KV |
15 Meg |
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| Economy Line Axial Lead Resistors - EC Series | |||||||
| KRL Style |
MIL-R-10509 |
Length |
Diameter |
Lead AWG |
Power in Watts |
Maximum Voltage |
Maximum Resistance |
| †EC-10 | RN-55 |
0.250 |
0.125 |
22 |
0.25 |
200 |
100K |
| †EC-20 | RN-60 |
0.375 |
0.125 |
22 |
0.4 |
300 |
150K |
| †EC-25 | 0.375 |
0.187 |
22 |
0.5 |
325 |
175K |
|
| †EC-30 | RN-65 |
0.500 |
0.187 |
22 |
0.75 |
350 |
200K |
| EC-40 | RN-70 |
0.750 |
0.250 |
20 |
1 |
400 |
300K |
| EC-50 | RN-75 |
1.000 |
0.375 |
20 |
1.5 |
600 |
500K |
†Indicates most popular types.

FEATURES