Wirewound Resistors, buy Electrical Part of Color code for Noninductive Wirewound Resistors on China Suppliers Mobile

Product Details

NKN Electrical Part of Color code for Noninductive Wirewound Resistors

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

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