Metal Film Fuse Resistors FMF Features: 1.Low temperature coefficient ,high precision, low noise, and good high frequency performance.2.Can be fusible during the stated time for protecting the circuit once working at the required overload voltage. 2. Operating ambient temperature :-55°C~+275°C 3. The surface is brick red nonflammable coating and indicating a white ring at the behind of the precision color ring. 4.Resistance tolerance:±5%,±10%.
Metal Film Fuse Resistors FMF
Products | Metal Film Fuse Resistors FMF | |||||||||||||
Features | 1.Low temperature coefficient ,high precision, low noise, and good high frequency performance.2.Can be fusible during the stated time for protecting the circuit once working at the required overload voltage. 2. Operating ambient temperature :-55°C~+275°C 3. The surface is brick red nonflammable coating and indicating a white ring at the behind of the precision color ring. 4.Resistance tolerance:±5%,±10%. | |||||||||||||
Dimensions and Voltage Performance. | ||||||||||||||
Part No. | Power | Resistance tolerance | Dimensions | Max. | Max. | Max. insulation | ||||||||
L±1 | D±0.5 | d±0.05 | ||||||||||||
CFM014 | 1/4W | 0R1~10K | 6.0 | 2.3 | 0.45 | 200V | 400V | 300V | ||||||
CFM12S | 1/2WS | 0R1~10K | 6.0 | 2.3 | 0.45 | 200V | 400V | 300V | ||||||
FMF012 | 1/2W | 0R1~10K | 9.0 | 3.2 | 0.58 | 250V | 500V | 500V | ||||||
FMF01S | 1WS | 0R1~10K | 9.0 | 3.2 | 0.58 | 250V | 500V | 500V | ||||||
FMF01B | 1W | 0R1~10K | 11.0 | 4.5 | 0.75 | 350V | 700V | 710V | ||||||
FMF02S | 2WS | 0R1~10K | 11.0 | 4.5 | 0.75 | 350V | 700V | 710V | ||||||
FMF02B | 2W | 0R1~10K | 15.0 | 5.0 | 0.75 | 350V | 700V | 710V | ||||||
FMF03S | 3WS | 0R1~10K | 15.0 | 5.0 | 0.75 | 350V | 700V | 710V | ||||||
Fusing Characteristics: | ||||||||||||||
Fusing Spec. | Multiple Rate Power | 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 |
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Performance Test | ||||||||||||||
Test Item | Test Condition | Performance | ||||||||||||
Temperature Coefficient | Test the resistance value at normal temperature and normal temperature added 100°C, calculate per °C resistance value change rate. | ±250ppm/°C | ||||||||||||
Short Time overload | 10×rated voltage or Max. overload voltage(get the lower) for 5 seconds. |
R≤±(1%R0+0.05Ω) | ||||||||||||
Pulse overload | At 4×rated voltage or Max. pulse overload voltage(get the lower)cycle 10000±200times(1second on,25 seconds off). |
R≤±(1%R0+0.05Ω) | ||||||||||||
Resistance to soldering Heat | Immerge into the 350±10°C tin stove for 2~3seconds. |
R≤±(1%R0+0.05Ω) | ||||||||||||
Solderability | Immerge into the 245±3°C tin stove for 2~3seconds. | The soldering area is over 95%. | ||||||||||||
Temperature cycling | At -55°C for 30 min. ,then at+25°C for 10~15°C,then at +125°C for 30 min., then at +25°C for 10~15 min., total 5cycles. |
R≤±(1% R0+0.05Ω) | ||||||||||||
Load life in humidity | Overload rated voltage or Max. working voltage(get the lower) for 1000 hours(1.5hours on and 0.5 hours off) at the 40±2°C and 90~95% relative humidity. |
R≤±(5%R0+0.05Ω) | ||||||||||||
Load life in heat | Overload rated voltage or Max. working voltage(get the lower) for 1000 hours(1.5hours on and 0.5 hours off) at the 70±2°C. |
R≤±(5%R0+0.05Ω) | ||||||||||||
Nonflammability | Respectively load AC voltage by 5,10,16 times rated power for 5 minutes . | No visible flame. | ||||||||||||
Note: We can according customer’s requirements to customize the other fusing characteristics resistors . |
Construction Drawing of Metal Film Fuse Resistors FMF:
Rated Power Derating Curve of Metal Film Fuse Resistors FMF:
Fusing Curve of Metal Film Fuse Resistors FMF: