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DATA SHEET
METAL FILM RESISTORS
Flameproof
FMF Series
±0.5%, ±1%, ±2%, ±5%
1/4W to 3W
RoHS compliant & Halogen Free
Product specification – August 13, 2021 V.0
Through Hole Resistors
Product Specification
2
15
Metal Film Resistors
FMF
ORDERING INFORMATION
Part number of the flameproof metal film resistor are identified by the
series, power rating, tolerance, packing, temperature coefficient, forming
and resistance value.
PART NUMBER
FMF
(1)
-25
(2)
F
(3)
T
(4)
F
(5)
52-
(6)
100R
(7)
APPLICATIONS
All general purpose
applications
Power applications
(1) SERIES
FMF Series
(2) POWER RATING
-25 = 1/4W
50S = 1/2W
2WS = 2W
200 = 2W
3WS = 3W
100 = 1W
FEATURES
Wide resistance range
High stability
Flameproof coating equivalent
to UL-94V-0
RoHS compliant &
halogen-free
-50 = 1/2W
1WS = 1W
(3) TOLERANCE
D = ±0.5%
F = ±1%
(4) PACKAGING
R = Reel Pack
T = Box Pack
G = ±2%
J = ±5%
B = Bulk
(5) TEMPERATURE COEFFICIENT OF RESISTANCE
E=±50ppm/°C
F=±100ppm/°C
(6) FORMING
26- = 26mm
52- = 52.4mm
73- = 73mm
M = M-Type Forming
MB = M-form W/flat
F = F Type
FK = FK Type
FFK = F-form Kink
FKK = FKK Type
FT = FT Type Forming
PN = PANAsert
AV = AVIsert
- = Based on spec.
(7) RESISTANCE VALUE
E24 & E96 Series
Example:
100R = 100Ω, 10K = 10,000Ω, 1M = 1,000,000Ω
www.yageo.com
Aug. 13, 2021
V.0
Through Hole Resistors
Product Specification
3
15
Metal Film Resistors
FMF
DIMENSIONS
Unit: mm
Normal
FMF-25
FMF-50
FMF100
FMF200
Miniature
FMF50S
FMF1WS
FMF2WS
FMF3WS
L
6.3 ± 0.5
9.0 ± 0.5
ψD
2.4 ± 0.2
3.3 ± 0.3
H
28 ± 2.0
26 ± 2.0
35 ± 2.0
33 ± 2.0
ψd
0.55 ± 0.05
0.55 ± 0.05
0.8 ± 0.05
0.8 ± 0.05
11.5 ± 1.0 4.5 ± 0.5
15.5 ± 1.0 5.0 ± 0.5
DERATING CURVE
Rated Power (%)
100
80
60
40
20
20
40
70
100
155
Ambient Temperature (
°
C)
ELECTRICAL CHARACTERISTICS
CHARACTERISTICS
Power Rating at 70 °C
Maximum Working Voltage
Maximum Overload Voltage
Voltage Proof on Insulation
Resistance Range
Operating Temp. Range
Temperature Coefficient
FMF-25
1/4W
250V
500V
400V
FMF50S
1/2W
300V
600V
400V
FMF-50
1/2W
350V
700V
500V
FMF1WS
1W
400V
800V
500V
FMF100
1W
500V
1000V
500V
FMF2WS
2W
500V
1000V
500V
FMF3WS
3W
500V
1000V
500V
1Ω ~ 4M7Ω for E24 & E96 series value
- 55°C to +155°C
±50ppm/°C , ±100ppm/°C
Note: For resistance value out of above range is by request.
www.yageo.com
Aug. 13, 2021
V.0
Through Hole Resistors
Product Specification
4
15
Metal Film Resistors
FMF
TEST AND REQUIRMENTS
TEST
Short Time Overload
TEST METHOD
IEC 60115-1 4.13
PROCEDURE
2.5 times RCWV for 5 sec.(Not more than
maximum overload voltage)
Voltage Proof on
Insulation
Temperature Coefficient
Insulation Resistance
Solderability
Solvent Resistance of
Marking
Robustness of
Terminations
Periodic-pulse Overload
IEC 60115-1 4.39
IEC 60115-1 4.16
Direct load for 10 Sec. in the direction of
the terminal leads
4 times RCWV 10,000 cycles (1 Sec. on,
25 Sec.off)
Damp Heat Steady State
IEC 60115-1 4.24
40±2°C,90-95% RH for 56 days, loaded
with 0.1 times RCWV
Endurance at 70°C
IEC 60115-1 4.25
70±2°C at RCWV(or Umax., whichever
less) for 1,000 Hr.(1.5 Hr.on,0.5 Hr. off)
Temperature Cycling
IEC 60115-1 4.19
-55°C
Room Temp.
±0.75%+0.05Ω
±1.5%+0.05Ω
±1.5%+0.05Ω
±1.0%+0.05Ω
IEC 60115-1 4.8
IEC 60115-1 4.6
IEC 60115-1 4.17
IEC 60115-1 4.30
IEC 60115-1 4.7
In V-Block for 60 sec. test voltage as
above table
Between -55°C to +155°C
In V-Block for 60 sec.
245±5°C for 3±0.5 Sec.
IPA for 5±0.5 Min. with ultrasonic
By Type
>1,000MΩ
95% Min. coverage
No deterioration of
coatings and markings
≥2.5Kg(24.5N)D
No Breakdown
APPRAISE
±0.25%+0.05Ω
+155°C Room Temp.(5 cycles)
Resistance to Soldering
Heat
Accidental Overload Test
IEC 60115-1 4.26
IEC 60115-1 4.18
260±3°C for 10±1 Sec., immersed to a
point 3±0.5mm from the body
4 times RCWV for 1 Min.
No evidence of flaming
or arcing
±0.25%+0.05Ω
Note:
RCWV (Rated Continuous Working Voltage ):
The DC or AC (rms) continuous working voltage corresponding to the rated power is determined by the following
formula:
V=√(P X R)
or max. working voltage whichever is less
Where
V=Continuous rated DC or
AC (rms) working voltage (V)
P=Rated power (W)
R=Resistance value (Ω)
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Aug. 13, 2021
V.0
Microcontroller MCU
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