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DATA SHEET
MELF CARBON FILM RESISTORS
General Purpose
MCF Series
±2%, ±5%
1/6W to 1W
Product specification – August 24, 2021 V.0
RoHS compliant & Halogen Free
Through Hole Resistors
Melf Carbon Film Resistors
Product Specification
ORDERING INFORMATION
Part number of the MELF carbon film resistor is identified by the series,
power rating, tolerance, packing, temperature coefficient and resistance
value.
PART NUMBER
APPLICATIONS
All general purpose
applications
Power applications
MCF
25S
J
R
-
100R
(1)
(2)
(3)
(4)
(5)
(6)
(1) SERIES
MCF Series
Energy meter
(2) POWER RATING
FEATURES
MELF, SMD package
Excellent pulse withstanding
capability
Wide resistance range
RoHS compliant &
halogen-free
-12 = 1/6W
50S = 1/2W
25S = 1/4W
207 = 0.6W
204 = 0.4W
-50 = 1/2W
-25 = 1/4W
1WS = 1W
(3) TOLERANCE
G = ±2%
- = Based on spec.
J = ±5%
(4) PACKAGING
R = Reel Pack
(5) TEMPERATURE COEFFICIENT OF RESISTANCE
- = Based on spec.
(6) RESISTANCE VALUE
E24 Series value
Example:
1R = 1Ω, 10K = 10,000Ω, 1M = 1,000,000Ω
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Aug. 24, 2021
V.0
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8
MCF
Through Hole Resistors
Product Specification
Melf Carbon Film Resistors
8
MCF
DIMENSIONS
Unit: mm
Normal
Miniature
L
D
C Min.
MCF-12
MCF25S / MCF204
3.50 ± 0.2
1.40 ± 0.15
0.5
MCF-25
MCF50S / MCF207
5.90 ± 0.2
2.20 ± 0.1
0.5
MCF-50
MCF1WS
8.50 ± 0.2
3.20± 0.2
0.5
SUGGESTED PAD LAYOUT
Unit: mm
Soldering
L Min.
Mode
P
W Min.
MCF25S
MCF204
Reflow
1.3
1.6 ± 0.1
1.6
Wave
1.5
1.5 ± 0.1
1.8
MCF50S
MCF207
Reflow
2.0
3.0 ± 0.1
3.0
Wave
2.5
3.0 ± 0.1
3.0
Reflow
2.3
5.5 ± 0.2
4.0
Wave
2.8
5.5 ± 0.2
4.0
Normal
Miniature
MCF-12
MCF-25
MCF-50
MCF1WS
DERATING CURVE
Rated Power (%)
100
80
60
40
20
20
40
70
100
155
Ambient Temperature (°C)
TABLE I TEMPERATURE COEFFICIENT
TYPE
MAX. VALUE OF TEMP. COEFFICIENT PPM/ °C
under 1KΩ
1K1Ω – 47KΩ
51KΩ – 470KΩ
510KΩ – 1MΩ
0 ~ -350
0 ~ -600
0 ~ -1000
0 ~ -1500
under 10KΩ
11KΩ – 150KΩ
160KΩ – 1MΩ
0 ~ -350
0 ~ -600
0 ~ -1000
MCF-12,MCF25S,MCF204
MCF-25, MCF50S, MCF207,
MCF-50, MCF1WS
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V.0
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Through Hole Resistors
Melf Carbon Film Resistors
Product Specification
8
MCF
ELECTRICAL CHARACTERISTICS
CHARACTERISTICS
MCF-12
MCF25S
MCF204 MCF-25
MCF50S MCF207
MCF-50
MCF1WS
Power Rating
at 70 °C
1/6W
1/4W
0.4W
1/4W
1/2W
0.6W
1/2W
1W
Maximum Working
Voltage
200V
250V
250V
300V
300V
300V
350V
350V
Maximum Overload
Voltage
400V
500V
500V
600V
600V
600V
700V
700V
Voltage Proof on
Insulation
200V
200V
200V
500V
500V
500V
700V
700V
Resistance Range
10Ω ~ 1MΩ & 0Ω for E24 series value
Operating Temp.
Range
- 55°C to +155°C
Temperature
Coefficient
see Table I
Note: For resistance value out of above range is by request.
TEST AND REQUIRMENTS
TEST
TEST METHOD
Short Time Overload
IEC 60115-1 4.13
PROCEDURE
2.5 times RCWV for 5 sec.(Not more than
APPRAISE
±1.0%+0.05Ω
maximum overload voltage)
Voltage Proof on
IEC 60115-1 4.7
Insulation
In V-Block for 60 sec. test voltage as
No Breakdown
above table
Temperature Coefficient
IEC 60115-1 4.8
Between -55°C to +155°C
By Type
Insulation Resistance
IEC 60115-1 4.6
In V-Block for 60 sec.
>10,000MΩ
Solderability
IEC 60115-1 4.17
245±5°C for 3±0.5 Sec.
95% Min. coverage
Solvent Resistance of
IEC 60115-1 4.30
IPA for 5±0.5 Min. with ultrasonic
No deterioration of
Marking
coatings and markings
Periodic-pulse Overload
IEC 60115-1 4.39
4 times RCWV 10,000 cycles (1 Sec. on,
±1.0%+0.05Ω
25 Sec.off)
Damp Heat Steady State
IEC 60115-1 4.24
40±2°C,90-95% RH for 56 days, loaded
±5.0%+0.05Ω
with 0.1 times RCWV
Endurance at 70°C
IEC 60115-1 4.25
70±2°C at RCWV(or Umax., whichever
±3.0%+0.05Ω
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
+155°C Room Temp.(5 cycles)
Resistance to Soldering
Heat
IEC 60115-1 4.18
260±3°C for 10±1 Sec., immersed to a
±1.0%+0.05Ω
point 3±0.5mm from the body
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Aug. 24, 2021
V.0
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Through Hole Resistors
Melf Carbon Film Resistors
Product Specification
8
MCF
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)
PACKING
TYPE
Unit: piece
Normal
Miniature
Packaging
Quantity Per Reel
MCF-12
MCF25S
MCF204
7”
3,000
MCF-25
MCF50S
MCF207
7”
2,000
MCF-50
MCF1WS
13”
2,500
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Aug. 24, 2021
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Through Hole Resistors
Melf Carbon Film Resistors
Product Specification
8
MCF
MARKING
3-BAND-CODE
±2%, ±5%
COLOR
BLACK
BROWN
RED
ORANGE
YELLOW
GREEN
BLUE
VIOLET
GREY
WHITE
GOLD
SILVER
1st BAND
0
1
2
3
4
5
6
7
8
9
2nd BAND
0
1
2
3
4
5
6
7
8
9
MULTIPLIER
1Ω
10Ω
100Ω
1KΩ
10KΩ
100K
1MΩ
10MΩ
0.001Ω
0.0001Ω
0.1Ω
0.01Ω
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Aug. 24, 2021
V.0
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Through Hole Resistors
Melf Carbon Film Resistors
Product Specification
8
MCF
REVISION HISTORY
REVISION
DATE
CHANGE NOTIFICATION
DESCRIPTION
Version 0
Aug. 2, 2021
-
- First issue of this specification
“ Yageo reserves all the rights for revising the content of this datasheet without further notification, as long as
the products itse lf are unchanged. Any product change will be announced by PCN.”
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Aug. 24, 2021
V.0
7
Through Hole Resistors
Melf Carbon Film Resistors
Product Specification
8
MCF
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inaccuracies or incompleteness contained in any product related information, including but not limited to product
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including warranties of fitness for a particular purpose, non-infringement and merchantability.
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knowledge of typical operating conditions for such types of applications in a generic nature. Such statements are
neither binding statements of Yageo nor intended to constitute any warranty concerning the suitability for a
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Information provided here is intended to indicate product specifications only. Yageo reserves all the rights for revising this
content without further notification, as long as products are unchanged. Any product change will be announced by PCN.
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