LEADED RESISTORS
DERATING CURVE
Melf Metal Film Resistors
MMF Type
Normal & Miniature Style [ MMF Series ]
FEATURES
Power Rating 1/6W,1/4W,1/2W,1W,2W
Resistance Tolerance ±0.1%, ±0.25%, ±0.5%, ±1%
T.C.R ±15ppm/°C,±25ppm/°C,±50ppm/°C,±100ppm/°C
Unit : mm
DIMENSIONS
STYLE DIMENSION
Normal Miniature L D1 D2max Cmin
MMF-12 MMF25S/MMF204 3.5±0.2 1.4±0.15 1.55 0.5
MMF-25 MMF50S/MMF207 5.9± 0.2 2.2±0.15 2.4 0.5
MMF-50 MMF1WS 8.5± 0.2 3.2±0.20 3.4 0.5
Ambient Temperature (°C)
Rated Load (%) 100
80
60
40
20
20 40 60 80 100 120 140 160 180
70ºC
C
(4) (1) (3) (2)
L
D1
D3
粗
D2
Note :
ELECTRICAL CHARACTERISTICS
STYLE MMF-12 MMF25S MMF204 MMF-25 MMF50S MMF207 MMF-50 MMF1WS
Power Rating at 70 °C 1/6W 1/4W 0.4W 1/4W 1/2W 0.6W 1/2W 1W
Maximum Working Voltage 150V 200V 200V 250V 300 V 300V 350V 350V
Maximum Overload Voltage 300V 400V 400 V 500V 600V 600V 700V 700V
Operating Temp. Range - 55°C to +155°C
Standard Value Range 1Ω~10MΩ
Temperature Coefcient ±25ppm/°C, ±50ppm/°C,±100ppm/°C
* Standard resistance is 1Ω~10MΩ, below or over this resistance on request.
ENVIRONMENTAL CHARACTERISTICS
PERFORMANCE TEST TEST METHOD APPRAISE
Short Time Overload JIS-C-5202 5.5 2.5 Times RCWV for 5 Seconds ±(0.25%+0.05Ω)
Dielectric Withstanding Voltage JIS-C-5202 5.7 in V-Block for 60 Seconds by Type
Temperature Coefcient of Resistance JIS-C-5202 5.2 -55°C to +155°C by Type
Insulation Resistance JIS-C-5202 5.6 in V-Block >10000MΩ
Solderability JIS-C-5202 6.5 235±5°C for 5±0.5 Seconds 95% Min. Coverage
Resistance to Solvent JIS-C-5202 6.9 IPA for 1 Min. with Ultrasonic No Deterioration of
Coatings and Markings
Terminal Strength Direct Load for 10 Sec. in The Direction of The Terminal Leads ≥2.5kg (24.5N)
Pulse Overload JIS-C-5202 5.8 4 Times RCW V 10000 Cycles (1 Sec. on , 25 Sec. off) ±(1%+0.05Ω)
Load Life in Humidity JIS-C-5202 7.9 40±2°C, 90~95% RH at RCWV for 1000 Hrs. ±(1.5%+0.05Ω)
(1.5 Hrs. on , 0.5 Hrs. off )
Load Life JIS-C-5202 7.10 70°C at RCWV for 1000 Hrs. (1.5 Hrs. on , 0.5 Hrs. off) ±(1.5%+0.05Ω)
Temperature Cycling JIS-C-5202 7.4 -55°C➞Room Temp.➞+155°C➞Room Temp. for 5 Cycles ±(0.75%+0.05Ω)
Resistance to Soldering Heat JIS-C-5202 6.4 350°C±10°C for 3±0.5 Seconds ±(0.25%+0.05Ω)
* Rated Continuous Working Voltage (RCWV)= Power Rating x Resistance Value
Mouser Electronics
Authorized Distributor
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MMF25SFRE22R1 MMF25SFRE475K MMF25SFRE120K MMF25SFRE13K MMF25SFRE182R MMF25SFRE18R
MMF25SFRE18R2 MMF25SFRE1K2 MMF25SFRE200K MMF25SFRE220K MMF25SFRE24R3 MMF25SFRE1K
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MMF25SFRE18K MMF25SFRE180K MMF25SFRE180R MMF25SFRE2K4 MMF25SFRE2K49 MMF25SFRE2K7
MMF25SFRE20K MMF25SFRE24K3 MMF25SFRE27K4 MMF25SFRE270R MMF25SFRE274R MMF25SFRE3K3
MMF25SFRE30K MMF25SFRE33K MMF25SFRE4K99 MMF25SFRE47K5 MMF25SFRE5K6 MMF25SFRE56K
MMF25SFRE560R MMF25SFRE82K MMF25SFRE10R MMF25SFRE150K MMF25SFRE2K55 MMF25SFRE330K
MMF25SFRE360R MMF25SFRE39R MMF25SFRE49R9 MMF25SFRE4K3 MMF25SFRE4M64 MMF25SFRE51R
MMF25SFRE75R MMF25SFRE91R MMF50SFRE100R MMF50SFRE182K MMF50SFRE1K MMF50SFRE1M6
MMF50SFRE250R MMF50SFRE47R MMF50SFRE5K62 MMF25SFRE1M MMF25SFRE1R MMF25SFRE15R
MMF25SFRE221R MMF25SFRE4R75 MMF25SFRE2K2 MMF25SBRD12K MMF25SFRE470K MMF25SFRE47R5
MMF25SFRE22K MMF25SFRE6K81 MMF25SFRE24K MMF25SFRE33R2 MMF25SFRE332K MMF25SFRE20R
MMF25SFRE200R MMF25SFRE15K MMF25SFRE3K9 MMF25SFRE220R MMF25SFRE68K MMF25SBRD27K
MMF25SFRE470R MMF25SFRE330R MMF25SFRE590K MMF25SBRD470R MMF25SFRE61K9 MMF25SFRE680K
MMF25SFRE4K7 MMF25SFRE475R MMF25SFRE2K74 MMF25SFRE22R MMF204FRE47R MMF25SFRE1R2
MMF204FRE130R MMF50SFRE1R5 MMF25SFRE60R4 MMF25SFRE1R5 MMF25SFRE2R21 MMF25SFRE3R32
MMF204FRE470K MMF25SFRE390K MMF50SFRE6R65 MMF25SFRE2R32
