Flameproof Fusible Fixed Resistors
Low temperature coeflicient high precision,.low noise and good high frequency performance
Product Description
SAMPLE PRODUCT
CONSTRUCTION
FEATURES
1. Low temperature coeflicient high precision,.low noise and good high frequency performance
2. Can be Fusible during the stated time for protecting the circuit once wording at the required overload voltage
3. Operating ambient temperature:-55℃~+125℃
4. The surface is gray 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 |
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|
L±1 |
D±0.5 |
d±0.05 |
H±1 |
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|
1/4W |
0R1~1K |
6.0 |
2.3 |
0.45 |
26.0 |
200V |
400V |
300V |
|
1/2WS |
0R1~1K |
6.0 |
2.3 |
0.45 |
26.0 |
200V |
400V |
300V |
|
1/2W |
0R1~1K |
9.0 |
3.2 |
0.55 |
26.0 |
250V |
500V |
500V |
|
1WS |
0R1~1K |
9.0 |
3.2 |
0.55 |
26.0 |
250V |
500V |
500V |
|
1W |
0R1~1K |
11.0 |
4.5 |
0.65 |
26.0 |
350V |
700V |
710V |
|
2WS |
0R1~1K |
11.0 |
4.5 |
0.65 |
26.0 |
350V |
700V |
710V |
|
2W |
0R1~1K |
15.0 |
5.0 |
0.70 |
26.0 |
350V |
700V |
710V |
|
3WS |
0R1~1K |
15.0 |
5.0 |
0.70 |
26.0 |
350V |
700V |
710V |
Fusing Characteristics
|
Fusing Spec |
Multiple Rate |
Rated resistance range |
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|
<2R |
2~10R |
>10R |
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|
Fusing time (s) |
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|
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 |
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|
Temperature Coefficient |
Test the resistance value at normal temperature and normal temperature added 100'C.calculate per℃ resistance value change tate. |
±250ppm/℃ |
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|
Short time overload |
2.5x rated voltage or Max.overlord voltage （get the lower)for5seconds |
△R<±(2%R+0.05Ω) |
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|
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) |
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|
Resistance to soldering hent |
Immerge into the 350+ 10℃ tin stove for 2-3seeonds |
△R≤±(1%R+0.05Ω) |
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|
Solderability |
Immerge into the 245+3 tin stove for 2-3seeonds |
The soldering area in over95% |
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|
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) |
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|
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) |
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|
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) |
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|
Nonflammability |
Respectively load AC voltage by 5、10、16times rated power for 5 minutes |
No visible flame |
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|
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% |
|
