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Low-Ohm Non-Inductive Power Resistors
(NP Series)


diagramResistor manufacturing

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:

  • Resistance Range: .005Ω -.1Ω stand ard; .001Ω -100Ω available
  • Standard Tolerances: 5%, 3%, 1%, .5%, .25%.
    (.1% available for .02Ω and higher)
  • Operating Temperature Range: -55°C to +200°C
  • Temperature Coefficient, 0°C to 85°C:
  • ±50 ppm/°C, .015Ω and higher; ±100 ppm/°C below .015Ω
  • Environmental Performance: exceeds the requirements of MIL-PRF-49465
  • RoHS compliant, Pb-Free construction available.

diagram

 

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

diagramdiagram

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