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DATA SHEET
MELF CARBON FILM RESISTORS
General Purpose
MCF Series
±2%, ±5%
1/6W to 1W
RoHS compliant & Halogen Free
Product specification – August 24, 2021 V.0
Through Hole Resistors
Melf Carbon Film Resistors
MCF
Product Specification
2
8
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
Energy meter
(2) POWER RATING
-12 = 1/6W
50S = 1/2W
207 = 0.6W
-50 = 1/2W
1WS = 1W
MCF
(1)
25S
(2)
J
(3)
R
(4)
-
(5)
100R
(6)
(1) SERIES
MCF Series
FEATURES
MELF, SMD package
Excellent pulse withstanding
capability
Wide resistance range
RoHS compliant &
halogen-free
25S = 1/4W
204 = 0.4W
-25 = 1/4W
(3) TOLERANCE
G = ±2%
J = ±5%
(4) PACKAGING
R = Reel Pack
- = Based on spec.
(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
Through Hole Resistors
Melf Carbon Film Resistors
MCF
Product Specification
3
8
DIMENSIONS
Unit: mm
Normal
MCF-12
MCF-25
MCF-50
Miniature
MCF25S / MCF204
MCF50S / MCF207
MCF1WS
L
3.50 ± 0.2
5.90 ± 0.2
8.50 ± 0.2
D
1.40 ± 0.15
2.20 ± 0.1
3.20± 0.2
C
Min.
0.5
0.5
0.5
SUGGESTED PAD LAYOUT
Unit: mm
Normal
MCF-12
Miniature
MCF25S
MCF204
MCF50S
MCF207
Soldering
L Min.
Mode
Reflow
Wave
Reflow
Wave
Reflow
MCF-50
MCF1WS
Wave
2.8
5.5 ± 0.2
4.0
1.3
1.5
2.0
2.5
2.3
P
1.6 ± 0.1
1.5 ± 0.1
3.0 ± 0.1
3.0 ± 0.1
5.5 ± 0.2
W Min.
1.6
1.8
3.0
3.0
4.0
MCF-25
DERATING CURVE
Rated Power (%)
100
80
60
40
20
20
40
70
100
155
Ambient Temperature (
°
C)
TABLE I TEMPERATURE COEFFICIENT
TYPE
MCF-12,MCF25S,MCF204
0 ~ -350
MCF-25, MCF50S, MCF207,
MCF-50, MCF1WS
under 10KΩ
0 ~ -350
0 ~ -600
11KΩ – 150KΩ
0 ~ -600
0 ~ -1000
160KΩ – 1MΩ
0 ~ -1000
0 ~ -1500
MAX. VALUE OF TEMP. COEFFICIENT PPM/ °C
under 1KΩ
1K1Ω – 47KΩ
51KΩ – 470KΩ
510KΩ – 1MΩ
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Aug. 24, 2021
V.0
Through Hole Resistors
Melf Carbon Film Resistors
MCF
Product Specification
4
8
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
MCF-12
1/6W
200V
400V
200V
MCF25S
1/4W
250V
500V
200V
MCF204 MCF-25
0.4W
250V
500V
200V
1/4W
300V
600V
500V
MCF50S MCF207
1/2W
300V
600V
500V
0.6W
300V
600V
500V
MCF-50
1/2W
350V
700V
700V
MCF1WS
1W
350V
700V
700V
10Ω ~ 1MΩ & 0Ω for E24 series value
- 55°C to +155°C
see Table I
Note: For resistance value out of above range is by request.
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
Periodic-pulse Overload
IEC 60115-1 4.39
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
±3.0%+0.05Ω
±5.0%+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
>10,000MΩ
95% Min. coverage
No deterioration of
coatings and markings
±1.0%+0.05Ω
No Breakdown
APPRAISE
±1.0%+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
point 3±0.5mm from the body
±1.0%+0.05Ω
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Aug. 24, 2021
V.0
Through Hole Resistors
Melf Carbon Film Resistors
MCF
Product Specification
5
8
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
Normal
MCF-12
MCF-25
MCF-50
Miniature
MCF25S
MCF204
MCF50S
MCF207
MCF1WS
Packaging
7”
7”
13”
Quantity Per Reel
3,000
2,000
2,500
Unit: piece
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Aug. 24, 2021
V.0
NXP MCU
