Low-Ohm Non-Inductive Power Resistors
(NP Series)
Features:
- Std Range: .005Ω -.1Ω
- Std Tolerances: 5%, 3%, 1%
- Less than 20 Nanohenries Inductance
- Low Temperature Coefficients:
- NP-1A: ±40 ppm + 8250 ppm/ value in milliohms
- NP-2A, NP-3: ±40 ppm + 3030 ppm/ value in milliohms
- NP-5A: ±40 ppm + 1865 ppm/ value in milliohms
- High Power to Size Ratio
- Operating Temperature Range: -55°C to 275°C
- Environmental Performance: Exceeds the requirements of MIL-PRF-49465
- RoHS compliant, Pb-Free construction available
- See Derating Chart Below
| LOW OHM Power Resistors -- NP Series | |||||||
|---|---|---|---|---|---|---|---|
| STYLE | WATTS | MAX CURRENT |
DIELECTRIC WATTSTRAND |
"L" LENGTH ± .010" |
"D" DIA. ± .010" |
"C" TST PNT |
"A" AWG ± .003" |
| NP-1A
|
1
|
12A
|
500 VAC
|
.430
|
.120
|
.590
|
24 (.020") |
| NP-2A
|
3
|
20A
|
1000 VAC
|
.600
|
.210
|
.675
|
20 (.032") |
| NP-3
|
4
|
20A
|
1000 VAC
|
.680
|
.265
|
.715
|
20 (.032") |
| NP-5A
|
5
|
26A
|
1000 VAC
|
.925
|
.275
|
.838
|
18 (.040") |
|
Four Terminal Low-OHM NON-INDUCTIVE Resistors KRL's Four Terminal Low-OHM Resistors were designed for low resistance applications requiring the highest accuracy and temperature stability. When used in a "Kelvin" configuration, applying current through two opposite leads and sensing voltage across the other two leads, the resistance and temperature coefficient of the leads are effectively eliminated. This results in lower TC's and lower self-heating drift than with two terminal resistors, and eliminates the need for connecting to the leads at precise "test points", allowing tighter tolerances to be held as well. Features:
|
||
| Four Terminal LOW OHM Power Resistors -- NP(4) Series | |||||||
|---|---|---|---|---|---|---|---|
| KRL STYLE |
MAX WATTS |
MAX CURRENT |
DIELECTRIC WITHSTAND |
DIMENSIONS | |||
| "L" LENGTH ± .015 |
"D" DIA ± .015 |
SPACE ± .010 |
LN (MIN) | ||||
| NP(4)-2A |
3
|
22A
|
1000 VAC
|
.625
|
.200
|
.125
|
1.25
|
| NP(4)-4 |
4.5
|
22A
|
1500 VAC
|
1.060
|
.335
|
.200
|
1.5
|
| NP)-7 |
7
|
22A
|
1500VAC
|
1.500
|
.375
|
.200
|
1.5
|
