ROHM MCR18EZHJS Technical data
Low Ohmic Thick Film Chip Resistors
MCR18 (3216 size (1206 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) ROHM resistors have approved ISO9001- / ISO/TS 19649- certification.
Ratings
Design and specifications are subject to change without notice. Carefully check the specification sheet before using or ordering
it.
Item Conditions Specifications
Rated power
Power must be derated according to the power derating curve in
Figure 1 when ambient temperature exceeds 70
100
80
60
40
POWER LOAD (%)
20
0
−55 0 70 100 155
AMBIENT TEMPERAT
URE (°C)
Fig.1
°
C.
0.25W (1 / 4W)
at 70°C
Rated voltage
Nominal resistance See Table 1.
Operating temperature
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= P×R
E: Rated voltage (V)
P: Rated power (W)
R: Nominal resistance (Ω)
Limiting element voltage 1.51(9.1Ω)
−55
°
C to +155°C
Table 1
Resistance tolerance
F(±1%)
J (±5%)
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.
Special
specification
L
L
S
L
L
S
Resistance range
(Ω)
0.1 to 0.13
0.15 to 9.1
0.047 to 0.091
0.1 to 0.13 400±200
0.15 to 0.91
0.047 to 0.091
(E24)
(E24)
(E24)
(E24)
(E24)
(E24)
Resistance temperature coefficient
(ppm/°C)
400±200
±250
500±300
±250
500±300
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2011 ROHM Co., Ltd. All rights reserved.
2011.12 - Rev.G
MCR18 (3216 size (1206 size) : 1 / 4W)
Characteristics
Guaranteed value
Resistor type
Resistance
Item Test conditions (JIS C 5201-1)
J : ±5%
F : ±1%
JIS C 5201-1 4.5
Load voltage : A
Measuring method : measure upper termination
by 4 proves.
Upper termination
Prove
Data Sheet
Variation of resistance
with temperature
Overload
Solderability
Resistance to
soldering heat
Rapid change of
temperature
Damp heat, steady state
Endurance at 70°C
Endurance
Component
solvent resistance
Bend strength of
the end face plating
Dimensions (Unit : mm)
See Table.1
± (2.0%+0.005Ω)
A new uniform coating of minimum of
95% of the surface being immersed
and no soldering damage.
± (1.0%+0.005Ω)
No remarkable abnormality on the appearance.
± (1.0%+0.005Ω)
± (3.0%+0.005Ω)
± (3.0%+0.005Ω)
± (3.0%+0.005Ω)
± (0.5%+0.005Ω)
Without open.
JIS C 5201-1 4.8
Measurement : +25 / −55 / +25 / +125°C
JIS C 5201-1 4.13
Rated voltage (current) ×2.5, 2s.
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 4.18
Soldering condition : 260±5
°C
Duration of immersion : 10±1s.
JIS C 5201-1 4.19
°C
Test temp. : −55
to +125°C 5cyc
JIS C 5201-1 4.24
40
°C, 93%RH
Test time : 56days
JIS C 5201-1 4.25.1
70
°C,
Rated voltage
1.5h : ON − 0.5h : OFF
Test time : 1,000h
JIS C 5201-1 4.25.3
°C
155
Test time : 1,000h to 1,048h
JIS C 5201-1 4.29
°C±5°C
23
Solvent : 2-propanol
JIS C 5201-1 4.33
1
0.5±0.25
0.5±0.25
3.2±0.15
2
3
4
5
6
0.55±0.1
1.6±0.15
No.
1
Resistive element (Oxide metal thick film)
2
Silver thick film electrode
3
Nickel electrode
4
Sn electrode
5
Alumina substrate
6
Overcoating (Glass)
Material
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2011 ROHM Co., Ltd. All rights reserved.
2011.12 - Rev.G
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