Shenzhen PakHeng Electronics Ltd


Catalogue


Contact US


Tel: 86-755-86229698


Fax : 86-755-86229508


Email: sales01@pakheng.com / sales20@pakheng.com 


Address: The 3rd Industry Zone, Yanchuan, Songgang, Baoan District, Shenzhen, Guangdong, China

Wirewound Fixed Resistors

Wirewound Fixed Resistors

1、Good heat-durability. low temperature coefficient, low noise, high load power . 2、Operating ambient temperatur: -55℃~+275℃ . 3、 Surface is nonflammable ,t he 1/ 4 W~6W coating is gay white and indicate the resistance value by color ring; the 7W or voer will indicate the resistance value by...

    1、Good heat-durability. low temperature coefficient, low noise, high load power.

    2、Operating ambient temperatur: -55℃~+275℃.

    3、Surface is nonflammable ,the 1/4W~6W coating is gay white and indicate the resistance value by color ring; the 7W or voer will indicate the resistance value by lettering and coats green.

    4、Resistance tolerance:±1%、±2%、±5%、±10%.


    图片9.png

    A、High heat exchanged Ceramic core.

    B、Nickel Chrome or nickel an copper alloy.

    C、Iron Cap.

    D、Sillicon resin coating.

    E、Color Ring.

    F、Tinned copper lead wire.


    Rated Power Derating Curve:

    图片10.png

    Dimensions and Voltage Performance


    Part No.

    Power

    Resistance range

    Dimensions

    Max. working voltage

    Max.overload voltage

    L±1

    D±0.5

    d±0.05

    KNR014

    1/4W

    0R5~750R

    6.0

    2.3

    0.52

    150V

    300V

    KNR012

    1/2W

    0R01~1K5

    9.0

    3.2

    0.58

    150V

    400V

    KNR01B

    1W

    0R01~1K5

    9.0

    3.2

    0.75

    150V

    400V

    KNR02B

    2W

    0R01~3K3

    11.0

    4.5

    0.75

    250V

    400V

    KNR03B

    3W

    0R01~4K7

    15.0

    5.0

    0.75

    350V

    600V

    KNR04B

    4W

    0R01~8K2

    17.0

    6.0

    0.75

    350V

    600V

    KNR05B

    5W

    0R01~8K2

    17.0

    6.0

    0.75

    350V

    600V

    KNR06B

    6W

    0R02~12K

    24.0

    8.0

    0.75

    500V

    600V

    KNR07B

    7W

    0R03~18K

    31.0

    8.0

    0.75

    500V

    600V

    KNR08B

    8W

    0R03~27K

    41.0

    8.0

    0.75

    500V

    600V

    KNR09B

    9W

    0R04~33K

    52.0

    8.0

    0.75

    750V

    800V

    KNR10B

    10W

    0R04~33K

    52.0

    8.0

    0.75

    750V

    800V


    Performance Test


     Test Item

    Test Condition

    Performance

    Temperature coefficient

    Test the resistance value at normal temperature and normal temperature added 100℃,calculate per℃ resistance value change rate .

    ±300ppm/

    Short time overload

    1/4~4W: According 5 times rated voltage, 5~10W: According 10 times rated power to account the voltage or Max.overload voltage (get the lower) for 5 seconds.

    ΔR≤±(2%R0+0.05Ω)

    Pulse overload

    10000±200次。At 4 × rated voltage or Max. pulse overload voltage (get the lower) cycle 10000±200 times(1 second on, 25 seconds off ).

    ΔR≤±(1%R0+0.05Ω)

    Resistance to soldering heat

    Immerge into 350±10℃ tin stove for 2~3 seconds.

    ΔR≤±1%R0

    Solderability

    Immerge into 245±3℃ tin stove for 2~3 seconds.

    The area of soldering is over 95%

    Temperature cycling

    At  -55℃ for 30 min, then at +25℃ for 10~15 min, then at +125℃ for 30 min, then at +25℃ for 10~15 min, total 5 cycles.

    ΔR≤±(1%R0+0.05Ω)

    Load life in humidity

    Overload rated voltage or Max.working voltage (get the lower) for 1000 hours (1.5 hours on and half-hour off ) at the 40±2℃ and 90~95% relative humidity.

    ΔR≤±(5%R0+0.05Ω)

    Load life in heat

    Overload rated voltage or Max.working voltage (get the lower ) for 1000 hours (1.5 hours on and half-hour off) at the 70±2℃.

    ΔR≤±(5%R0+0.05Ω)

    Nonflammability

    Respectively load AC voltage by 5、10、16 times rared power for 5 minutes.

    No visible flame


    PakHeng Electronics is one of the leading Wirewound Fixed Resistors manufacturers and suppliers in China, offering the free sample and competitive price. Welcome to wholesale the high quality bulk resistors made in China from us. It if of good performance and high safety.
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