Through-hole resistors
Melf Carbon Film Resistors
General Type
Normal & Miniature Style [ MCF Series ]
FEATURES
Power Rating
1/6W, 1/4W, 0.4W, 1/2W, 0.6W, 1W
Resistance Tolerance
±2%, ±5%
T.C.R.
see Table 1
DERATING CURVE
For resistors operated in ambient temperatures above 70°C, power rating must be derated
in accordance with the curve below.
INTRODUCTION
The MCF Series Melf Carbon Film Resistors
are manufactured by coating a homogeneous
film of pure carbon on high grade ceramic rods.
SMD enabled structure.
Rated Load (%)
70
155 °C
100
80
60
40
20
20
40
60
80
100 120 140 160
Ambient Temperature (°C)
TABLE 1 TEMPERATURE COEFFICIENT
STYLE
Max. Value of Temp. Coefficient ppm/°C
MCF-12, MCF25S, MCF204 under 1KΩ
0 to -350
MCF-25, MCF50S, MCF207, under 10KΩ
MCF-50, MCF1WS
0 to -350
1K1Ω -47KΩ
51KΩ -470KΩ
510KΩ -1MΩ
0 to -600
0 to -1,000
0 to -1,500
11KΩ -150KΩ
160KΩ -2M2Ω
0 to -600
0 to -1,000
DIMENSIONS
Unit: mm
STYLE
D
C
L
DIMENSION
Normal
Miniature
L
D
C Min.
MCF-12
MCF25S / MCF204
3.5±0.2
1.4±0.15
0.5
MCF-25
MCF50S / MCF207
5.9±0.2
2.2±0.1
0.5
MCF-50
MCF1WS
8.5±0.2
3.2±0.2
0.5
33
Note:
ELECTRICAL CHARACTERISTICS
Style
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
300V
350V
Maximum Overload Voltage
400V
500V
600V
700V
Voltage Proof on Insulation
200V
500V
700V
Resistance Range
10Ω - 1MΩ & 0Ω for E24 series value
Operating Temp. Range
-55°C to +155°C
Temperature Coefficient
see Table 1
Note: Special value is available on request
ENVIRONMENTAL CHARACTERISTICS
PERFORMANCE TEST
TEST METHOD
APPRAISE
Short Time Overload
IEC 60115-1 4.13
2.5 times RCWV for 5 sec. (Not more than maximum Overload Voltage)
±1.0%+0.05Ω
Voltage Proof on Insulation
IEC 60115-1 4.7
In V-Block for 60 sec., test voltage as above table
No Breakdown
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 Marking
IEC 60115-1 4.30
IPA for 5±0.5 Min. with ultrasonic
No deterioration of
coatings and markings
Periodic-pulse Overload
IEC 60115-1 4.39
4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off)
±1.0%+0.05Ω
Damp Heat Steady State
IEC 60115-1 4.24
40±2°C, 90-95% RH for 56 days, loaded with 0.1 times RCWV
±5.0%+0.1Ω
Endurance at 70°C
IEC 60115-1 4.25
70±2°C at RCWV (or Umax., Whichever less) for 1,000 Hr. (1.5Hr.on, 0.5Hr. Off) ±3.0%+0.1Ω
Temperature Cycling
IEC 60115-1 4.19
-55°C Room Temp. +155°C Room Temp. (5 cycles)
±0.75%+0.05Ω
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
Note: RCWV(Rated Continuous Working Voltage) = Power Rating x Resistance Value or Max. working voltage listed above, whichever less.
Revision: 2020
Mouser Electronics
Authorized Distributor
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MCF-25JR-150R MCF-25JR-22R MCF-25JR-33R MCF25SJR-22K MCF25SJR-910K MCF25SJR-15K MCF-25JR100K MCF-25JR-180K MCF25SJR-470K MCF-25JR-33K MCF25SJR-330K MCF-25JR-39K MCF-25JR-47R MCF25JR-560K MCF25SJR-3K3 MCF25SJR-560K MCF-25JR-220K MCF-25JR-240R
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