MCR18
Resistors
Rev.H 1/4
Thick Film Chip Resistors
MCR18 (1206 size: 1 / 4W)
zFeatu res
1) Power rating of 1 / 4W
2) Highly re liable chip resistor Ruthe nium oxide dielectri c offers superi or resistance to the elements.
3) Electrodes not corroded by soldering
Thick film makes the electrodes very strong.
4) Leading the world in development and ma ss production.
Since start of production in 1976 (first in the wold), this component has established a solid reputation as a
general–purpo se chip resistor .
5) ROHM resistors have approved ISO9001- / ISO/TS 16949- certi fication.
zRatings
Design and sp ecifications are subject to cha nge wit hout notice. Careful ly check the specificati on sheet befor e using or
ordering it.
0.25W (1 / 4W)
−55°
C
to +155°
C
200V
at 70°C
0.125W (1 / 8W)
at 70°C
Item Conditions Specifications
Rated power
Rated voltage
Operating temperature
Nominal resistance See Table 1.
Limiting element voltage
Power must be derated according to the power derating curve in
Figure 1 when ambient temperature exceeds 70°
C
.
The voltage rating is calculated by the following equation.
If the value obtained exceeds the limiting element voltage,
the voltage rating is equal to the maximum operating voltage.
E: Rated voltage (V)
P: Rated power (W)
R: Nominal resistance (Ω)
E= P×R
D
J, F
0
20
40
60
80
100
−55 0 70 100 155
AMBIENT TEMPERATURE (°C)
POWER LOAD (%)
Fig.1
MCR18
Resistors
Rev.H 2/4
Max. 50mΩ
2A
−55°C to +155°C
Resistance
Rated current
Operating temperature
Jumper type
Table 1
Resistance tolerance Resistance range
(Ω)Resistance temperature coefficient
(ppm / °
C
)
F (±1%)
J (±5%)
10 to 10M
10 to 2.2M (E24,96)
(E24)
(E24)
±100
±200
1.0 to 9.1 ±400
D (±0.5%)
100 to 1M (E24)
(E24)
±50
10 to 91 ±100
zBefore using components in circuits where they will be exposed to transients such as pulse loads (short–duration, high–level lo ads), be certain to evaluate the
component in the mounted state. In addition, the reliability and performance of this component cannot be guaranteed if it is used with a steady state voltage that
is greater than its rated voltage.
zCharacteristics
Item Test conditions (JIS C 5201-1)
Resistor type
Guaranteed value
Jumper type
Resistance
Variation of resistance
with temperature
Solderability
Damp heat, steady state
Endurance at 70°C
Endurance
Rapid change of
temperature
Bend strength of
the end face plating
Resistance to solvent
Resistance to
soldering heat
Overload ± (2.0%+0.1Ω) Max. 50mΩ
± (1.0%+0.05Ω)
± (3.0%+0.1Ω)
Max. 50mΩ
Max. 100mΩ
J : ±5%
F : ±1%
D : ±0.5%
See Table.1
No remarkable abnormality on the appearance.
A new uniform coating of minimum of
95% of the surface being immersed
and no soldering damage.
Without mechanical damage such as breaks.
Max. 50mΩJIS C 5201-1 4.5
JIS C 5201-1 4.8
Measurement : −55 / +25 / +125°C
JIS C 5201-1 4.18
Soldering condition : 260±5
°C
Duration of immersion : 10±1s.
JIS C 5201-1 4.24
40
°C, 93%RH
Test time : 1,000h to 1,048h
± (3.0%+0.1Ω)
± (3.0%+0.1Ω)
± (1.0%+0.05Ω)
± (1.0%+0.05Ω)
± (1.0%+0.05Ω)
Max. 100mΩ
Max. 100mΩ
Max. 50mΩ
Max. 50mΩ
Max. 50mΩ
JIS C 5201-1 4.25.1
Rated voltage (current), 70
°C
1.5h : ON − 0.5h : OFF
Test time : 1,000h to 1,048h
JIS C 5201-1 4.25.3
155
°C
Test time : 1,000h to 1,048h
JIS C 5201-1 4.29
23±5
°C
, Immersion cleaning, 5±0.5min.
Solvent : 2-propanol
JIS C 5201-1 4.19
Test temp. : −55
°C
to +125
°C
5cyc
JIS C 5201-1 4.33
JIS C 5201-1 4.17
Rosin·Ethanol (25%WT)
Soldering condition : 235±5
°C
Duration of immersion : 2.0±0.5s.
JIS C 5201-1 4.13
Rated voltage (current) ×2.5, 2s.
Maximum overload voltage : 400V
MCR18
Resistors
Rev.H 3/4
zDimensions (Unit : mm)
0.5±0.25
1.6±0.15 0.55±0.1
0.5±0.25
3.2±0.15
No.
Material
Resistive element (Oxide metal thick film)
Silver thick film electrode
Nickel electrode
Sn electrode
Alumina substrate
Overcoating (Resin)
1
2
3
4
5
6
1
2
4
5
3
6
zPackaging
0 2
0 4
0 6
0 8
0 2
0 4
0 6
0 8
C
ABD
ABCD
P
0
P
2
P
1
E
FW
T
2
φD
0
A
2
B
2
Label EIAJ ET-7200B compliant
Thick paper
mount (Underside paper tape) Chip resistor Square punchout hole
Heat crimp cover/Tape
φ180 0
−1.5 φ60 +1
09 +1.0
0φ13±0.2
4.0±0.1 4.0±0.1 2.0±0.05 Max. 1.1
φ1.5 +0.1
0
8.0±0.3 3.5±0.05 1.75±0.1 1.95 +0.1
−0.05 3.5 +0.15
−0.05
(Unit: mm)
(Unit: mm)
WFEA
2
B
2
D
0
P
0
P
1
P
2
T
2
Reel Taping
MCR18
Resistors
Rev.H 4/4
zPart No. Explanation
Packaging Specifications Code
Part No.
MC 81RE
Resistance tolerance
ZP J
Nominal resistance
EZP Paper tape (4mm Pitch) φ180mm (7in.) 5,000
MCR18
J
±
5%
F
±
1%
D
±
0.5%
J is also used
for jumper
Reel (φ180) : Compatible with JEITA standard "EIAJ ET-7200B"
: Standard product
Part No. Resistance tolerance
Code Packaging specifications Reel
Basic ordering unit (pcs)
J(
±
5%) F(
±
1%) D(
±
0.5%)
F, D
J:
:4 digits
3 digits
Resistance code, 3 or 4 digits.
000 denotes jumper type.
Resistance
tolerance Resistance
code
Appendix1-Rev3.0
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Appendix
Notes
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The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you
wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM
upon request.
Examples of application circuits, circuit constants and any other information contained herein illustrate the
standard usage and operations of the Products. The peripheral conditions must be taken into account when
designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document. However, should
you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no respon-
sibility for such damage.
The technical information specified herein is intended only to show the typical functions of and examples of
application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or
exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility
whatsoever for any dispute arising from the use of such technical information.
The Products specified in this document are intended to be used with general-use electronic equipment or
devices (such as audio visual equipment, office-automation equipment, communication devices, electronic
appliances and amusement devices).
The Products are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or
malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard against the
possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as
derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your
use of any Product outside of the prescribed scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or system
which requires an extremely high level of reliability the failure or malfunction of which may result in a direct
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