leaded resIsTOrs
Metal Film Resistors
MFR Type
Normal & Miniature Style [ MFR 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/ºC,
±25ppm/ºC, ±50ppm/ºC, ±100ppm/ºC
deraTING CUrVe
INTrOdUCTION
The MFR Series Metal Film Resistors are
manufactured using vacuum sputtering system
to deposit multiple layers of mixed metals and
passivative materials onto a carefully treated high
grade ceramic substrate, the resistors are coated
with layers of blue lacquer.
Rated Load (%)
100
80
60
40
20
20
40
60
80
100
120 140
160
180
70ºC
Ambient Temperature (ºC)
HOT
-sPOT TeMPeraTUre
Surface Temp. Rise (ºC)
200
150
100
50
Measuring Position
MFR2WS
MFR200
MFR100
MFR-50
MFR-25
MFR-12
0
25
50
75
100
MFR1WS
MFR50S
MFR25S
Applied Load, % of RCWV
dIMeNsIONs
sTYle
Normal
MFR-12
ød
H
L
øD
MFR-25
MFR-50
MFR100
MFR200
Miniature
MFR25S
MFR50S
MFR1WS
MFR2WS
-
dIMeNsION
l
3.4±0.3
6.3±0.5
9.0±0.5
11.5±1.0
15.5±1.0
ød
1.9±0.2
2.4±0.2
3.3±0.3
4.5±0.5
5.0±0.5
H
28±2.0
28±2.0
26±2.0
35±2.0
33±2.0
ød
Unit : mm
0.5±0.05
0.6±0.05
0.6±0.05
0.8±0.05
0.8±0.05
Note :
eleCTrICal CHaraCTerIsTICs
sTYle
Power Rating at 70ºC
Operating Temp. Range
Maximum Working Voltage
Maximum Overload Voltage
Dielectric Withstanding Voltage
Value Range ±0.5%, ±1%
Value Rang ±0.1%, ±0.25%
Temperature Coefficient (by Type)
MFr-12
1/6W
MFr25s
1/4W
MFr-25
MFr50s
1/2W
MFr-50
MFr1Ws MFr100
1W
MFr2Ws MFr200
2W
-55ºC to +155ºC
200V
400V
300V
10Ω~1MΩ
100Ω~100KΩ
±15ppm/ºC, ±25ppm/ºC, ±50ppm/ºC, ±100ppm/ºC
200V
400V
400V
250V
500V
500V
300V
600V
500V
350V
700V
500V
400V
800V
700V
500V
1000V
1000V
500V
1000V
1000V
500V
1000V
1000V
* Resistance range for standard resistance, 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
-55ºC to +155ºC
in V-Block
235±5ºC
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±2ºC, 90~95% RH at RCWV for 1000 Hrs.
(1.5 Hrs. on , 0.5 Hrs. off )
70ºC
at RCWV for 1000 Hrs. (1.5 Hrs. on , 0.5 Hrs. off)
-55ºC➞Room
Temp.➞+155ºC➞Room Temp. for 5 Cycles
350ºC±10ºC for 3±0.5 Seconds
* Rated Continuous Working Voltage (RCW V)=
Power Rating x Resistance Value
