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precision power wirewound resistors - knp-r series

precision power wirewound resistors - knp-r series

token provides precision power wirewound resistors. knp-r series meeting mil-r-26e (u and v characteristics) and surface temperature (hot spot) 375°c max. resistors with a wide range of 0.01Ω ~ 82kΩ, covering applications from precision to power. products with lead-free terminations meet eu rohs and china rohs requirements.

precision power wirewound resistors

characteristics u:

  • 275°c maximum hot spot temperature.
    1% maximum Δr in 1000 hours load life.

characteristics v:

  • 375°c maximum hot spot temperature. 3% maximum Δr in 1000 hours load life.

token knp-r series have an operating temperature range of -55°c ~ +375°c, they must be derated at high ambient temperatures according to the chart below.

technical specifcations
precision power wirewound resistors power derating curve precision power wirewound resistors dimensions
type mil
-
r-26e
power rating
(w)
max. working
voltage (v)
resistance range (Ω) dimensions (mm)
u v u v 0.1% 0.25% 0.5% 1% 2% 3% 5% l±0.81 d±0.81 d±0.1
knp-r1/4 - 0.40 - 20 - 10~950 1~3.4k 6.35 1.98 0.51
knp-r1/2 rw70 0.75 - 29 - 10~1.3k 1~4.9k 7.92 1.98 0.51
knp-r1a - 1.00 - 53 - 1~2.7k 0.1~10.4k 10.31 2.36 0.64
knp-r1 rw69 1.10 - 62 - 1~4.0k 0.1~15k 13.49 2.36 0.64
knp-r2a - 2.50 3.25 138 157 1~8.6k 0.01~32.3k 12.70 5.33 0.81
knp-r2 rw79 3.00 3.75 135 148 1~5k 0.01~2k 13.49 4.06 0.81
knp-r3a - 3.00 3.75 135 148 1~6.5k 0.01~34.5k 14.27 5.33 0.81
knp-r3 - 3.25 4.75 185 220 1~11.4k 0.01~42.1k 20.62 5.33 1.02
knp-r4 rw67 4.00 5.50 210 250 1~12.7k 0.01~47.1k 15.88 7.62 1.02
knp-r5 rw74 5.00 6.50 330 376 0.5~24.5k 0.01~51k 22.22 7.62 1.02
knp-r7 rw68 7.00 9.00 504 576 0.5~41.4k 0.01~75k 30.94 9.52 1.02
knp-r10 rw78 10.00 13.00 799 911 0.5~71.3k 0.01~82k 45.21 9.52 1.02
  • temperature coefficient: 1Ω and below ±150 ppm/°c, 1Ω to 9.9Ω ±100 ppm/°c, 10Ω and above ±100 ppm/°c, (50 ppm/°c on request)

  • electrical performance
    test items test method specifications
    short time overload 2.5 times of rated voltage 5 sec. Δr±(2%+0.05Ω)
    rated load rated wattage 30 minutes. Δr±(1%+0.05Ω)
    voltage withstanding 500vac 1 minute. Δr±(1%+0.05Ω)
    insulation resistance 500v 20mΩ
    temp. cycle -20°c ~ 85°c 5 cycles Δr±(1%+0.05Ω)
    soldering after resistance 235°c for 3 sec Δr±(0.5%+0.05Ω)
    incombustibility 16 times of rated wattage for 5 min. not flamed
    load life +25°c, 1.5hrs on ~ 0.5hrs off cycle, 1000 hrs. u: Δr±(1%+0.05Ω)
    v: Δr±(3%+0.05Ω)

    how to order
    knp-r3au100rbp
    12345
    1 part number
    2 characteristic
    codecharacteristic
    u275°c
    v375°c
    3 resistance
    coderesistance
    0r10.1Ω
    1r
    100r100Ω
    1k1000Ω
    4 resistance tolerance
    coderesistance tolerance
    b±0.1%
    c±0.25%
    d±0.5%
    f±1%
    g±2%
    h±3%
    j±5%
    5 package
    codepackage
    tbtaping box
    pbulk