MFF Series
Metal Film, Fusible Resistors
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Fusible Resistor
Resistances from 1 Ohm to 10K Ohms
Power Rating 1 to 3 Watts
Resistance Tolerances of ±5%
TCR: ± 250ppm/K Standard
SPECIFICATIONS
Wattage
Rating
( Watts )
1
1
2
2
3
1 Ohm to
10K Ohms
±5%
±250ppm/K
Ohmic Values
Tolerances
TCR
Dimensions
A
±0.040” [±1mm]
Type
B
±0.020” [±0.5mm]
C
±0.002” [±0.05mm]
D
MIN
MFFS-1
MFF-1
MFFS-2
MFF-2
MFFS-3
0.375 [9.5]
0.472 [12.0]
0.472 [12.0]
0.630 [16.0]
0.630 [16.0]
0.138 [3.5]
0.157 [4.0]
0.157 [4.0]
0.217 [5.5]
0.217 [5.5]
0.024 [0.6]
0.032 [0.8]
0.032 [0.8]
0.032 [0.8]
0.032 [0.8]
0.98 [25]
0.94 [24]
0.94 [24]
1.26 [32]
1.26 [32]
Specification
Fusing Characteristics
Temperature Range
Insulation Resistance
Max Working Voltage
Max Overload Voltage
Dielectric Voltage
Value
1 Ohm to 3.6 Ohms
1.1K Ohms to 3K Ohms
3.9 Ohms to 1K Ohms
-55°C to +155°C
>10000 MOhms
300V ( 250V MFFS-1 )
600V ( 400V MFFS-1 )
400V
Minimum Fusing Overload ( Time )
15 Times Rated Power ( 30s MAX )
12 Times Rates Power ( 30s MAX )
Environmental Performance
(MIL-STD 202)
ΔR
±5%
±0.5% + 0.05 Ohm
±1% + 0.02 Ohm
±2%
Load Life
Resistance to Solder Heat
Temperature Cycling
Short Time Overload
Ordering Information
Part Number - Resistance - Tolerance
Example: MFF-2 10 Ohm 5%
Riedon Inc.
09/08
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
