Wirewound Resistors, buy Colour Coding for 330R 470R Ohm Wire wound Resistors on China Suppliers Mobile

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KNR Colour Coding for 330R 470R Ohm Wire wound Resistors for LED Lights UPS Power

Wirewound Resistors KNR

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

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

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

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

Power: 1/4W,1/2W,1W,2W,3W,4W,5W,6W,7W,8W,10W

Tolerance: ±1%, ±2%,±5%,±10%.

Range:0R01-47K

Description	Power	Tolerance	Range
KN Wire-wound Resistors	1/4W 1/2W 1W 2W 3W 4W 5W 6W 7W 8W 10W	±5% ±2% ±1%	0R01-47K
NKN Non-inductive wire-wound Resistors	1/4W 1/2W 1W 2W 3W 4W 5W 6W 7W 8W 10W	±5% ±2% ±1%	0R01-100R
BKN Glaze Wire-wound Resistors	1W 2W 3W 4W 5W 6W 7W 8W 10W 12W	±5% ±2% ±1%	0R1-47K
BVR/LVR Low Value Alloy Wire-wound Resistors	1W 2W 3W 5W 10W	±5% ±1%	0R01-10R

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
KNR014	1/4W	0R5~750R	6.0	2.3	0.52	150V	300V	250V
KNR012	1/2W	0R01~1K5	9.0	3.2	0.58	150V	400V	250V
KNR01B	1W	0R01~1K5	9.0	3.2	0.75	150V	400V	250V
KNR02B	2W	0R01~3K3	11.0	4.5	0.75	250V	400V	350V
KNR03B	3W	0R01~4K7	15.0	5.0	0.75	350V	600V	500V
KNR04B	4W	0R01~8K2	17.0	6.0	0.75	350V	600V	500V
KNR05B	5W	0R01~8K2	17.0	6.0	0.75	350V	600V	500V
KNR06B	6W	0R02~12K	24.0	8.0	0.75	500V	600V	750V
KNR07B	7W	0R03~18K	31.0	8.0	0.75	500V	600V	750V
KNR08B	8W	0R03~27K	41.0	8.0	0.75	500V	600V	750V
KNR09B	9W	0R04~33K	52.0	8.0	0.75	750V	800V	1000V
KNR10B	10W	0R04~33K	52.0	8.0	0.75	750V	800V	1000V

Note:a,We can according to customer’s requirmement to customize the resistor which is out of the mormal resistance range;

b,If the calculated rated voltage is higher than the max. working voltage, it will be got the lower value.

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	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 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