MCR18
Resistors
Thick film rectangular
MCR18 (3216 size: 1 / 4W)
!Features
1) Power rating of 1 / 4W
2) Highly reliable chip resistor Ruthenium oxide dielectric offers superior resistance to the elements.
3) Electrodes not corroded by soldering
Thick film makes the electrodes very strong.
4) Leading the world in development and mass production.
Since start of production in 1976 (first in the wold), this component has established a solid reputation as a general–
purpose chip resistor.
5) ROHM resistors have approved ISO–9001 certification.
Design and specifications are subject to change without notice. Carefully check the specification sheet before using or
ordering it.
!Ratings
0.25W (1 / 4W)
−55
°
C
to +155
°
C
200V
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
0
20
40
60
80
100
−55 0 70 100 155
AMBIENT TEMPERAT
URE (°C)
POWER LOAD (%)
Fig.1
MCR18
Resistors
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
≤
R
≤
10M
10
≤
R
≤
2.2M (E24,96)
(E24)
(E24)
(E24)
±100
0.15
≤
R
<
10 (E24) ±250
0.15
≤
R
<
1 (E24) ±250
0.1
≤
R
< 0.15
(E24) 400±200
0.1
≤
R
< 0.15
(E24) 400±200
±200
2.2
≤
R
<
10 ±500
1.0
≤
R
<
2.2 500±350
!Before using components in circuits where they will be exposed to transients such as pulse loads (short–duration, high–level loads), 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.
!Characteristics
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%
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~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~1,048h
JIS C 5201-1 4.25.3
155
°C
Test time : 1,000h~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
~+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.
Limiting Element Voltage×2 : 400V
MCR18
Resistors
!External dimensions (Units : 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 palladium thick film electrode
Nickel electrode
Sn/Pb or Sn electrode
Alumina substrate
Overcoating (glass)
1
2
3
4
5
6
1
2
4
5
6
3
!Packaging
0 2
0 4
0 6
0 8
0 2
0 4
0 6
0 8
C
ABD
ABCD
P
0
P
2
P
2
E
FW
T
2
φD
2
A
2
B
2
110±0.7
12±0.1
Label
Slider
Shutter
EIAJ ET-7200A compliant
EIAJ ET-7201A compliant
Thick paper
mount (Underside paper tape) Chip resistor Square punchout hole
Heat crimp cover/Tape
φ180 0
−3φ60 +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
(Units: mm)
(Units: mm)
WFEA
2
B
2
D
2
P
2
P
2
P
2
T
2
(Units: mm)
Reel Taping
Bulk case
36 0
−0.2
MCR18
Resistors
!Makeup of the part number
MCR18 EZH
PZHI 5,000
5,000
F±1% ±5%J 10Ω or more (F class)
1Ω or more (J class)
Blank
Up to 10Ω (F class)
Up to 1Ω (J class)
L
Part No.
Paper tape
Bulk case
Code Packaging
Standard ordering
unit(pcs)
Specify "J" for jumper also.
Packaging / Processing specifications Resistance tolerance Special part number
Nominal resistancePart No.
3-digit or 4-digit IEC coding system
!Dimensions
3.00
2.95
3.05
3.10
3.20
3.15
3.25
3.30
3.35
3.40
3.45
RESISTANCE
(Ω)
LENGTH
(mm)
JIS C 5201-1 4.4.2
SAMPLE SIZE : n=20pcs
MICROMETER
0.1 1 10 100 1k 10k 100k 1M 10M
Fig.2 Dimensions (length)
0.1 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
WIDTH
(mm)
JIS C 5201-1 4.4.2
SAMPLE SIZE : n=20pcs
MICROMETER
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
Fig.3 Dimensions (width)
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75 JIS C 5201-1 4.4.2
SAMPLE SIZE : n=20pcs
MICROMETER
0.1 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
THICKNESS
(mm)
Fig.4 Dimensions (thickness)
!Electrical characteristics
RESISTANCE
(Ω)
DC RESISTANCE
(%)
0.1 1 10 100 1k 10k 100k 1M 10M
JIS C 5201-1 4.5
SAMPLE SIZE : n=20pcs
20°C 65%RH
−8.0
−6.0
−4.0
−2.0
0.0
2.0
4.0
6.0
8.0
Fig.5 Resistance
JIS C 5201-1 4.8
SAMPLE SIZE : n=10pcs
25°C / −55°C
25°C / 125°C
−900
−700
−500
−300
−100
100
300
500
700
900
TEMPERATURE COEFFICIENT (ppm/°C)
RESISTANCE (Ω)
0.1 1 10 100 1k 10k 100k1M 10M
Fig.6 Variation resistance with
temperature
−4.0
−3.0
−2.0
−1.0
0.0
1.0
2.0
3.0
4.0
RESISTANCE
(Ω)
∆R/R
(%)
0.1 1 10 100 1k 10k 100k1M 10M
JIS C 5201-1 4.13
SAMPLE SIZE : n=10pcs
RATED VOLTAGE×2.5TIMES : 2s
LIMITING ELEMENT VOLTAGE×2 : 400V
Fig.7 Overload
MCR18
Resistors
−2.0
−1.5
−1.0
−0.5
0
0.5
1.0
1.5
2.0
RESISTANCE CHANGE
(%)
RESISTANCE
(Ω)
JIS C 5201-1 4.18
SAMPLE SIZE : n=10pcs
SOLDERING CONDITION : 260°C 10s
0.1 1 10 100 1k 10k 100k 1M 10M
Fig.8 Resistance to soldering heat
−2.0
−1.5
−1.0
−0.5
0.0
0.5
1.0
1.5
2.0
0.1 1 10 100 1k 10k 100k 1M 10M
RESISTANCE (Ω)
JIS C 5201-1 4.19
SAMPLE SIZE : n=10pcs
−55°C / 125°C 5cyc
∆R/R (%)
Fig.9 Rapid change of
temperature
Fig.10 Damp heat, steady state
−4.0
−3.0
−2.0
−1.0
0
1.0
2.0
3.0
4.0
RESISTANCE CHANGE
(%)
RESISTANCE
(Ω)
JIS C 5201-1 4.24
SAMPLE SIZE : n=10pcs
40°C 93%RH WITH NO LOAD 1,000h
0.1 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
0.1 1 10 100 1k 10k 100k 1M 10M
JIS C 5201-1 4.25.1
SAMPLE SIZE : n=10pcs
70°C 1,000h
OVERLOAD : THE RATED VOLTAGE
−4.0
−3.0
−2.0
−1.0
0
1.0
2.0
3.0
4.0
RESISTANCE CHANGE
(%)
Fig.11
Endurance (at 70°C)
−4.0
−3.0
−2.0
−1.0
1.0
2.0
3.0
4.0
RESISTANCE CHANGE
(%)
RESISTANCE
(Ω)
0.1 1 10 100 1k 10k 100k 1M 10M
JIS C 5201-1 4.25.3
SAMPLE SIZE : n=10pcs
155°C WITH NO LOAD 1,000h
0
Fig.12 Endurance
JIS C 5201-1 4.29
SAMPLE SIZE : n=10pcs
IPA, 5min.
−2.0
−1.5
−1.0
−0.5
0.0
0.5
1.0
1.5
2.0
RESISTANCE
(Ω)
∆R/R (%)
0.1 1 10 100 1k 10k 100k 1M 10M
Fig.13 Resistance to solvents
−2.0
−1.5
−1.0
−0.5
0
0.5
1.0
1.5
2.0
RESISTANCE CHANGE (%)
RESISTANCE (Ω)
0.1 1 10 100 1k 10k 100k 1M 10M
JIS C 5201-1 4.33
SAMPLE SIZE : n=10pcs
ENDURANCE WITH 90mm WIDTH
Fig.14 Bend strength of
the end face plating
