KNR 5 Colour Code Calculator KNR Wire wound Resistor
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 | ||
L±1 | D±0.5 | d±0.05 | ||||||
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 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 |
Part No.Regulation:
KNR | 01B | J | 0 | T520 | 100R0 |
Product Name |
Power |
Tol. |
Special Code |
Forming |
Ohm |
Wirewound fixed resistors | 014=1/4W 012=1/2W 01B=1W 02B=2W 03B=3W 04B=4W 05B=5W 06B=6W 07B=7W 08B=8W 09B=9W 10B=10W | F =±1% G=±2% J =±5% K=±10% |
| T520=T52 T710=T71 M001=M F001=F B001=B
| 0R100=0.1Ω 0R220=0.22Ω 10R00=10Ω 100R0=100Ω 10K00=10KΩ |