ROHM MCR18 Technical data
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MCR18
Resistors
Thick film rectangular Low resistance series
MCR18 (3216 size (1206 size) : 1 / 4W)
zFeatu res
1) Power rating of 1 / 4W
2) Highly reliable chip resistor Ruthenium oxide dielectric of fers superior resist ance to the eleme nts.
3) Electrodes not corroded by soldering
Thick film makes the electrodes very strong.
4) Design and specifications are subject to change without notice. Carefully check the specification sheet before using or
ordering it.
zRatings
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
Fig.1
URE (°C)
°
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: Rated voltage (V)
E= P×R
P: Rated power (W)
R: Nominal resistance (Ω)
Limiting element voltage
°
C to +155°C
−55
1.58V(10Ω)
Rev.A 1/4
MCR18
Resistors
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 lo ads), be certain to evaluate the
z
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
zCharacteristics
Item Test conditions (JIS C 5201-1)
Resistance
J : ±5%
F : ±1%
Resistance range
(Ω)
0.15≤ R ≤ 9.1
0.1≤ R ≤ 0.13
0.047 ≤ R ≤ 0.091
0.15 ≤ R < 0.91 ±250
0.1 ≤ R ≤ 0.13 400±200
0.047 ≤ R ≤ 0.091
Guaranteed value
Resistor type
Resistance temperature coefficient
(E24)
(E24)
(E24)
(ppm/°C)
±250
400±200
500±300
(E24)
(E24)
(E24)
500±300
JIS C 5201-1 4.5
Load voltage : A
Measuring method : measure upper termination
by 4 proves.
Upper termination
Prove
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
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
Duration of immersion : 2.0±0.5s.
JIS C 5201-1 4.18
Soldering condition : 260±5
Duration of immersion : 10±1s.
JIS C 5201-1 4.19
Test temp. : −55
JIS C 5201-1 4.24
°C, 93%RH
40
Test time : 56days
JIS C 5201-1 4.25.1
°C,
Rated voltage
70
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
°C
°C
°C
to +125°C 5cyc
Rev.A 2/4
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