leaded resIsTOrs
Melf Metal Film Resistors
MMF Type
Normal & Miniature Style [ MMF Series ]
FeaTUres
Power Rating
Resistance Tolerance
T.C.R
1/6W,1/4W,1/2W,1W,2W
±0.1%, ±0.25%, ±0.5%, ±1%
±15ppm/°C,±25ppm/°C,±50ppm/°C,±100ppm/°C
deraTING CUrVe
Rated Load (%)
100
80
60
40
20
20
40
60
80
100
120 140
160
180
70ºC
Ambient Temperature (°C)
dIMeNsIONs
sTYle
粗
D3
Unit : mm
dIMeNsION
Miniature
MMF25S/MMF204
MMF50S/MMF207
MMF1WS
l
3.5±0.2
5.9± 0.2
8.5± 0.2
d1
1.4±0.15
2.2±0.15
3.2±0.20
d2max
1.55
2.4
3.4
Cmin
0.5
0.5
0.5
Normal
MMF-12
C
(4) (1)
(3) (2)
D1
D2
MMF-25
MMF-50
L
Note :
eleCTrICal CHaraCTerIsTICs
sTYle
Power Rating at 70 °C
Maximum Working Voltage
Maximum Overload Voltage
Operating Temp. Range
Standard Value Range
Temperature Coefficient
MMF-12
1/6W
150V
300V
- 55°C to +155°C
1Ω~10MΩ
±25ppm/°C, ±50ppm/°C,±100ppm/°C
MMF25s
1/4W
200V
400V
MMF204
0.4W
200V
400 V
MMF-25
1/4W
250V
500V
MMF50s
1/2W
300 V
600V
MMF207
0.6W
300V
600V
MMF-50
1/2W
350V
700V
MMF1Ws
1W
350V
700V
* Standard resistance is 1Ω~10MΩ, below or over this resistance on request.
eNVIrONMeNTal CHaraCTerIsTICs
PerFOrMaNCe TesT
Short Time Overload
Dielectric Withstanding Voltage
Temperature Coefficient of Resistance
Insulation Resistance
Solderability
Resistance to Solvent
Terminal Strength
Pulse Overload
Load Life in Humidity
Load Life
Temperature Cycling
Resistance to Soldering Heat
TesT MeTHOd
JIS-C-5202 5.5
JIS-C-5202 5.7
JIS-C-5202 5.2
JIS-C-5202 5.6
JIS-C-5202 6.5
JIS-C-5202 6.9
2.5 Times RCW V for 5 Seconds
in V-Block for 60 Seconds
-55°C to +155°C
in V-Block
235±5°C for 5±0.5 Seconds
IPA for 1 Min. with Ultrasonic
aPPraIse
±(0.25%+0.05Ω)
by Type
by Type
>10000MΩ
95% Min. Coverage
No Deterioration of
Coatings and Markings
≥2.5kg (24.5N)
±(1%+0.05Ω)
±(1.5%+0.05Ω)
±(1.5%+0.05Ω)
±(0.75%+0.05Ω)
±(0.25%+0.05Ω)
Direct Load for 10 Sec. in The Direction of The Terminal Leads
JIS-C-5202 5.8
JIS-C-5202 7.9
JIS-C-5202 7.10
JIS-C-5202 7.4
JIS-C-5202 6.4
4 Times RCW V 10000 Cycles (1 Sec. on , 25 Sec. off)
40±2°C, 90~95% RH at RCWV for 1000 Hrs.
(1.5 Hrs. on , 0.5 Hrs. off )
70°C at RCWV for 1000 Hrs. (1.5 Hrs. on , 0.5 Hrs. off)
-55°C
➞Room
Temp.➞+155°C➞Room
Temp. for 5 Cycles
350°C±10°C for 3±0.5 Seconds
* Rated Continuous Working Voltage (RCW V)=
Power Rating x Resistance Value
