Wirewound Fuse Resistor
Good heat-durability,low temperature coefficient,low noise,high load and power,nonflammability
Product Description
SAMPLE PRODUCT
CONSTRUCTION
FEATURES
1. Good heat-durability,low temperature coefficient,low noise,high load and power,nonflammability
2. Can be Fusible during the stated time for protecting the circuit.once wording at the required overload voltage.
3. Operating ambient temperature:-55℃~+275℃
4. The surface is gray white nonflammable coating and indicate a black ring at the behind of the precision color ring
5. Resistance tolerance:+5%，+10%
Dimensions and Voltage Performance
|
Type |
Resistance range |
Dimensions（mm） |
Max. working voltage |
Max. overload voltage |
Max.insulation voltage |
|||
|
L±1 |
D±0.5 |
d±0.05 |
H±1 |
|||||
|
1/2W |
0R1~10R |
9.0 |
3.2 |
0.55 |
26.0 |
150V |
400V |
250V |
|
1W |
0R1~10R |
9.0 |
3.2 |
0.65 |
26.0 |
150V |
400V |
250V |
|
2W |
0R1~15R |
11.0 |
4.5 |
0.70 |
26.0 |
150V |
400V |
250V |
|
3W |
0R1~22R |
15.0 |
5.0 |
0.70 |
26.0 |
350V |
600V |
500V |
|
4W |
0R1~27R |
17.0 |
6.0 |
0.70 |
26.0 |
350V |
600V |
500V |
|
5W |
0R1~27R |
17.0 |
6.0 |
0.75 |
26.0 |
350V |
600V |
500V |
Fusing Characteristics
|
Fusing Spec |
Multiple Rate |
Rated resistance range |
||
|
<2R |
2~10R |
>10R |
||
|
Fusing time (s) |
||||
|
G |
12 |
- - |
60 |
30 |
|
B |
16 |
60 |
30 |
15 |
|
C |
25 |
30 |
15 |
7.5 |
|
J |
25 |
|
|
|
Note:We can according customers requirement to customize the other fusing characteristics resistors
Performance Test
|
Test item |
Test Condition |
Performance |
|||||
|
Temperature Coefficient |
Test the resistance value at normal temperature and normal temperature added 100'C.calculate per℃ resistance value change tate. |
±300ppm/℃ |
|||||
|
Short time overload |
2.5x rated voltage or Max.overlord voltage （get the lower)for5seconds |
△R<±(2%R+0.05Ω) |
|||||
|
Pulse overload |
At 4xrated voltage or max.pulse overload voltage(get the Lower)cycle 10000±200times(second on,seconds off) |
△R≤±(1%R+0.05Ω) |
|||||
|
Resistance to soldering hent |
Immerge into the 350± 10℃ tin stove for 2-3seeonds |
△R≤±(1%R+0.05Ω) |
|||||
|
Solderability |
Immerge into the 245±3 tin stove for 2-3seeonds |
The soldering area in over95% |
|||||
|
Temperature cycling |
At-55℃ for 30 min.than at+25'C for 10-15min.then at +275Cfor min then at+25C for 10-15min,total 5cycles. |
△R≤±(1%R+0.05Ω) |
|||||
|
Load life in humidity |
Overload rated voltage or Max.working voltage (get the lower）for 1000 hourl1.5 hour on and half-hour off at the 40 ± 2℃ and 90-95% relative humidity |
△R≤±(5%R+0.05Ω) |
|||||
|
Load life in heat |
Overload rated voltage or Max,working voltage(get the lower)for 1000 hour(1.5hour on and halt-hour off） at the 70±2℃ |
△R≤±(5%R+0.05Ω) |
|||||
|
Nonflammability |
Respectively load AC voltage by 5, 10, 16times rated power for 5 minutes |
No visible flame |
|||||
|
Voltage ofngle-pulse High-voltage Overload |
|
RFC |
RFD |
RFE |
RFF |
RFG |
Requirement |
|
0.3-10Ω |
1600V |
1800V |
2000V |
2500V |
2500V |
△R/R≤±10% |
|
|
11Ω-1KΩ |
2000V |
2000V |
2500V |
3000V |
3000V |
△R/R≤±10% |
|
|
1.1k-10kΩ |
2500V |
3000V |
3000V |
4000V |
5000V |
△R/R≤±10% |
|
