Product Details

wire wound noninductive resistor

Wirewound Noninductive Resistors(NKN)

Features:

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

2, Operating ambient temperature:-55 to +275.

3,Surface is nonflammable,the 1/4-6W coating is gray white and indicate the resistance value by color ring, indicate a green ring at the behind of the precision color ring, the 7W or over will indicate the resistance value by lettering and coating is green.

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

Performance Test:

Test Item Test Condition Performance

Temperature coefficient ±300ppm/

Short time overload R≤±(2%R₀+0.05R)

Pulse overload R≤±(1%R₀+0.05R)

Resistance to soldering heat R≤±(1% R_0+0.05R)

Solerability The soldering area is over 95%

Temperature cycling R≤±(1% R₀+0.05R)

Load life in humidity R≤±(5% R₀+0.05R)

Load life in heat R≤±(5% R₀+0.05R)

Nonflammability No visible flame

wire wound noninductive resistor

Dimensions and Voltage Performance:

Part No.	Power	Resistance range	Dimensions			Max. working voltage	Max.overload voltage	Max.insulation voltage
Part No.	Power	Resistance range	L±1	D±0.5	d±0.05	Max. working voltage	Max.overload voltage	Max.insulation voltage
NKN012	1/2W	0R1-10R	9.0	3.2	0.58	150V	400V	250V
NKN01B	1W	0R1-10R	9.0	3.2	0.75	150V	400V	250V
NKN02B	2W	0R1-12R	11.0	4.5	0.75	150V	400V	350V
NKN03B	3W	0R1-22R	15.0	5.0	0.75	350V	600V	500V
NKN04B	4W	0R1-33R	17.0	6.0	0.75	350V	600V	500V
NKN05B	5W	0R1-33R	17.0	6.0	0.75	350V	600V	500V
NKN06B	6W	0R1-47R	25.0	8.0	0.75	500V	600V	750V
NKN07B	7W	0R1-56R	31.0	8.0	0.75	500V	600V	750V
NKN08B	8W	0R2-62R	41.0	8.0	0.75	500V	600V	750V
NKN09B	9W	0R3-100R	52.0	8.0	0.75	750V	800V	1000V
NKN10B	10W	0R3-100R	52.0	8.0	0.75	750V	800V	1000V

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	1/2~4W: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	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+0.05Ω)
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 ing 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 ing 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