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 produc-
tion.
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 certifica-
tion.
Design and specifications are subject to change with-
out notice. Carefully check the specification sheet be-
fore using or ordering it.
!Ratings
0.25W (1 / 4W)
−55
°
C
to + 155
°
C
200V
400V
400V
at 70
°
C
Item Conditions Specifications
Rated power
Rated voltage
Operating temperature
Nominal resistance See Table 1.
Max. operating voltage
Max. overload voltage
Max. intermittent overload 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 maximum operating 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 TEMPERATURE (
°
C
)
POWER LOAD (%)
Fig.1
MCR18
Resistors
Max. 50mΩ
2A
10A
−55
°
C
to + 155
°
C
Resistance
Rated current
Peak current
Operating temperature
Jumper type
F
( ± 1%)
J
( ± 5%)
2.2
≤
R
<
10
10
≤
R
≤
2.2M (E24,96)
(E24)
(E24)
(E24)
± 100
± 500
1.0
≤
R
<
2.2 500 ± 350
± 200
10
≤
R
≤
10M
Table 1
Resistance tolerance Resistance range
(Ω)Resistance temperature coefficient
(ppm / °
C
)
!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.
MCR18
Resistors
!Characteristics
JIS C 5202 5.6
Test voltage: 100V, 1min.
Assembled state
Test resistor
Insulation
sheath
Insulation plate
Metal plate
Spring-loaded
pressure
R 0.5
Observation
point B
Metal block
observation
point A
Characteristics Test method
Chip resistanceSpecifications Jumper type
DC resistance
Resistance temperature
characteristics
Insulation resistance
Withstand voltage
Intermittent overload
Terminal strength
(against bending of circuit board)
Solderability
Resistance to dry heat
Endurance
(rated load)
Endurance
(under load in damp environment)
Resistance to humidity
(steady state)
Temperature cycling
Resistance to solvents
Resistance to soldering heat
Short time overload ± (2.0% + 0.1Ω) Max. 50mΩ
± (5.0% + 0.1Ω) Max. 50mΩ
± (1.0% + 0.05Ω) Max. 50mΩ
± (1.0% + 0.05Ω)
± (3.0% +0.1Ω)
Max. 50mΩ
Max. 100mΩ
F: ± 1%
J: ± 5%
See Table 1.
Min. 1,000MΩ between terminal and board
Do not damage insulation or cause a short circuit.
There must be no mechanical damage.
Outside must not be noticeably damaged.
95% of terminal surface must be covered by
new soldering, and there must be
no soldering corrosion.
Markings must not be dissolved away.
Max. 50mΩJIS C 5202 5.1
Applied voltage: A
JIS C 5202 5.2
Test conditions: + 25 / −55 / + 25 / + 125°
C
JIS C 5202 5.7
Test voltage: 500V
JIS C 5202 5.8
Rated voltage (current): × 2.5
(1s: ON − 25s: OFF) × 10,000cyc.
JIS C 5202 6.1
JIS C 5202 6.4
Soldering conditions: 260 ± 5°
C
Soldering time: 10 ± 1s.
JIS C 5202 7.2
155°
C
Test time: 1,000 to 1,048 hrs.
± (3.0% +0.1Ω)
± (3.0% +0.1Ω)
± (3.0% +0.1Ω)
± (1.0% +0.05Ω)
± (0.5% +0.05Ω)
Max. 100mΩ
Max. 100mΩ
Max. 100mΩ
Max. 50mΩ
Max. 50mΩ
JIS C 5202 7.10
Rated voltage (current), 70°
C
1.5h: ON − 0.5h: OFF
Test time: 1,000 to 1,048 hrs.
JIS C 5202 7.9
Rated voltage (current), 60°
C
, 95%RH
1.5h: ON −0.5h: OFF
Test time: 1,000 to 1,048 hrs.
JIS C 5202 7.5
85°
C
, 85%RH
Test time: 1,000 to 1,048 hrs.
JIS C 5202 7.4
Test temperature: −55°
C
to + 125°
C
100cyc.
JIS C 5202 6.9
Room temperature, static immersion, 1 min.
Solvent: Isopropyl alcohol
JIS C 5202 6.5
Rosin methanol: (25%WT)
Soldering conditions: 235 ± 5°
C
Soldering time: 2.0 ± 0.5s.
JIS C 5202 5.5
Rated voltage (current): × 2.5, 5s.
Maximum overload voltage: 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
Thick dielectric glaze of ruthenium (only silver used for jumper)
Thick film of palladium-silver for primary electrode
Nickel-coated secondary electrode
External electrode coated with tin and lead
Alumina substrate
Overcoating
!Packaging
0 2
0 4
0 6
0 8
0 2
0 4
0 6
0 8
C
ABD
ABCD
φ268 ± 1.5
φ180
φ330 ± 2
φ100 ± 0.8
Min. φ80
9.4 ± 0.5
9.5 ± 0.5
φ13 ± 0.3
φ13 ± 0.2
0
−3φ60 9 ± 0.3 φ13 ± 0.2
+ 1
0
P
0
P
2
P
2
E
FW
T
2
φD
2
A
2
B
2
110 ± 0.7
36
12 ± 0.1
0
− 0.2
Label
Slider
Shutter
EIAJ ET-7001 compliant
EIAJ ET-7201A compliant
Thick paper
mount (Underside paper tape) Chip resistor Square punchout hole
Heat crimp cover/Tape
(Units: mm)
(Units: mm)
WFEA
2
B
2
D
2
P
2
P
2
P
2
T
2
8.0 ± 0.3 3.5 ± 0.05 1.75 ± 0.1 1.95 3.5
φ1.5 4.0 ± 0.1 4.0 ± 0.1 2.0 ± 0.05 Max. 1.1
+ 0.1
0
+ 0.1
−0.05 + 0.15
− 0.05
(Units: mm)
Reel Taping
Bulk case
MCR18
Resistors
!Makeup of the part number
MCR18 EZH
FZH
QZH
PZHI
5,000
10,000
20,000
5,000 World wide
World wide
World wide
World wide
F ± 1% ± 5%J 10Ω or more (F class)
1Ω or more (J class)
Blank
Part No.
Paper tape
Bulk case
Code Packaging
Standard ordering
unit(pcs)
Shipped to 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
1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
LENGTH
(mm)
JIS C 5202 4.3
SAMPLE SIZE : n = 20pcs
MICROMETER
0.47
Fig.2 Dimensions (length)
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
WIDTH
(mm)
JIS C 5202 4.3
SAMPLE SIZE : n = 20pcs
MICROMETER
Fig.3 Dimensions (width)
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
THICKNESS
(mm)
JIS C 5202 4.3
SAMPLE SIZE : n = 20pcs
MICROMETER
Fig.4 Dimensions (thickness)
!Electrical characteristics
−8.0
−6.0
−4.0
−2.0
0.0
2.0
4.0
6.0
8.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
DC RESISTANCE
(%)
JIS C 5202 5.1
SAMPLE SIZE : n = 20pcs
20°C 65%RH
Fig.5 DC resistance
− 900
− 700
− 500
− 300
− 100
100
300
500
700
900
10.47 10 100 1k 10k 100k1M 10M
RESISTANCE
(Ω)
TEMPERATURE COEFFICIENT
(ppm/
°
C)
JIS C 5202 5.2
SAMPLE SIZE : n = 10pcs
25°
C
/
−
55°
C
25°
C
/ 125˚
C
Fig.6 Resistance temperature
characteristics
− 4.0
− 3.0
− 2.0
− 1.0
0.0
1.0
2.0
3.0
4.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
∆R / R
(%)
JIS C 5202 5.5
SAMPLE SIZE : n = 10pcs
RATED VOLTAGE × 2.5TIMES : 5s
MAXIMUM OVERLOAD VOLTAGE : 400V
Fig.7 Short time overload
MCR18
Resistors
1
2
5
10
20
50
100
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE (Ω)
INSULATION RESISTANCE ( × 10
10
Ω)
JIS C 5202 5.6
SAMPLE SIZE : n = 10pcs
METALLIC BLOCK METHOD :
TEST VOLTAGE 100V 60s
Fig.8 Insulation resistance
− 2.0
− 1.5
− 1.0
− 0.5
0.0
0.5
1.0
1.5
2.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
RESISTANCE CHANGE
(%)
JIS C 5202 5.7
SAMPLE SIZE : n = 10pcs
METALLIC BLOCK METHOD :
TEST VOLTAGE 500V 60S
Fig.9 Withstand voltage
−6.0
−3.0
−4.0
−5.0
−2.0
−1.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
RESISTANCE CHANGE
(%)
JIS C 5202 5.8
SAMPLE SIZE : n = 10pcs
RATED VOLTAGE × 2.5TIMES
1s-ON 25s-OFF 10,000cyc
MAXIMUM INTERMITTENT
OVERLOAD VOLTAGE : 400V
Fig.10 Intermittent overload
− 2.0
− 1.5
− 1.0
− 0.5
0
0.5
1.0
1.5
2.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
RESISTANCE CHANGE
(%)
JIS C 5202 6.1
SAMPLE SIZE : n = 10pcs
ENDURANCE WITH 90mm WIDTH
Fig.11 Terminal strength
(bending strength
characteristics)
−2.0
−1.5
−1.0
−0.5
0
0.5
1.0
1.5
2.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
RESISTANCE CHANGE
(%)
JIS C 5202 6.4
SAMPLE SIZE : n = 10pcs
SOLDERING CONDITION : 260°C 10s
Fig.12 Resistance to soldering heat
−4.0
−3.0
−2.0
− 1.0
0
1.0
2.0
3.0
4.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
RESISTANCE CHANGE
(%)
JIS C 5202 7.2
SAMPLE SIZE : n = 10pcs
155°C WITH NO LOAD 1,000h
Fig.13 Resistance to dry heat
− 4.0
− 3.0
− 2.0
− 1.0
0
1.0
2.0
3.0
4.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
RESISTANCE CHANGE
(%)
JIS C 5202 7.10
SAMPLE SIZE : n = 10pcs
70°C 1,000h
OVERLOAD : THE RATED VOLTAGE
Fig.14
Endurance (rated load)
−4.0
−3.0
−2.0
−1.0
0
1.0
2.0
3.0
4.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
RESISTANCE CHANGE
(%)
JIS C 5202 7.9
SAMPLE SIZE : n = 10pcs
60°C 95%RH 1,000h
OVERLOAD : THE RATED VOLTAGE
Fig.15 Endurance (under load in
damp environment)
−4.0
−3.0
−2.0
−1.0
0
1.0
2.0
3.0
4.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
RESISTANCE CHANGE
(%)
JIS C 5202 7.5
SAMPLE SIZE : n = 10pcs
85°C 85%RH WITH NO LOAD 1,000h
Fig.16 Resistance to humidity
(steady state)
MCR18
Resistors
− 2.0
− 1.5
− 1.0
− 0.5
0.0
0.5
1.0
1.5
2.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
∆R / R
(%)
JIS C 5202 7.4
SAMPLE SIZE : n = 10pcs
−
55°C / 125°C 100cyc
Fig.17 Temperature cycling
− 2.0
− 1.5
− 1.0
− 0.5
0.0
0.5
1.0
1.5
2.0
0.47 1 10 100 1k 10k 100k 1M 10M
RESISTANCE
(Ω)
∆R / R
(%)
JIS C 5202 6.9
SAMPLE SIZE : n = 10pcs
IPA, 1min.
Fig.18 Resistance to solvents
