ROHM MCR18 Technical data

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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.

MCR18

!Ratings

Item Conditions Specifications

Rated power

Rated voltage

Nominal resistance See Table 1.
Operating temperature

Power must be derated according to the power derating curve in
Figure 1 when ambient temperature exceeds 70

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.

100

80

60

40

POWER LOAD (%)

20

0

−55 0 70 100 155

E= P×R

AMBIENT TEMPERAT

E: Rated voltage (V)
P: Rated power (W)
R: Nominal resistance (Ω)

URE (°C)

Fig.1

0.25W (1 / 4W)

°

C

°

C

at 70

to +155

200V

°

C

°

C

.

Limiting element voltage

−55

Resistors

MCR18

Jumper type

Resistance
Rated current
Operating temperature

!

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.

Max. 50mΩ

−55

°

C

2A

to +155

Table 1

Resistance tolerance

F (±1%)

°

C

J (±5%)

Resistance range

≤ R < 0.15

0.1
≤ R

< 10 (E24)

0.15

≤ R

≤ 2.2M (E24,96)

10

≤ R < 0.15

0.1

0.15

≤ R

< 1 (E24)

1.0

≤ R

< 2.2

2.2

≤ R

< 10

10

≤ R

≤ 10M

(Ω)

(E24)

(E24)

(E24)
(E24)
(E24)

Resistance temperature coefficient

(ppm / °

400±200

±250
±100

400±200

±250

500±350

±500
±200

C

)

!Characteristics

Item Test conditions (JIS C 5201-1)

Resistance
Variation of resistance

with temperature

Overload

Solderability

Resistance to
soldering heat

Rapid change of
temperature

Damp heat, steady state

Endurance at 70°C

Endurance

Resistance to solvent

Bend strength of
the end face plating

Resistor type

J : ±5%
F : ±1%

± (2.0%+0.1Ω) Max. 50mΩ

A new uniform coating of minimum of
95% of the surface being immersed
and no soldering damage.

± (1.0%+0.05Ω)

No remarkable abnormality on the appearance.

± (1.0%+0.05Ω)

± (3.0%+0.1Ω)

± (3.0%+0.1Ω)

± (3.0%+0.1Ω)

± (1.0%+0.05Ω)

± (1.0%+0.05Ω)

Without mechanical damage such as breaks.

Guaranteed value

Max. 50mΩ JIS C 5201-1 4.5

See Table.1

Max. 50mΩ

Max. 50mΩ

Max. 100mΩ

Max. 100mΩ

Max. 100mΩ

Max. 50mΩ

Max. 50mΩ

Jumper type

JIS C 5201-1 4.8
Measurement : −55 / +25 / +125°C

JIS C 5201-1 4.13
Rated voltage (current) ×2.5, 2s.
Limiting Element Voltage×2 : 400V

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 : 1,000h~1,048h

JIS C 5201-1 4.25.1
Rated voltage (current), 70

1.5h : ON − 0.5h : OFF
Test time : 1,000h~1,048h

JIS C 5201-1 4.25.3

°C

155
Test time : 1,000h~1,048h

JIS C 5201-1 4.29
23±5

°C

Solvent : 2-propanol
JIS C 5201-1 4.33

°C

, Immersion cleaning, 5±0.5min.

°C

°C

~+125°C 5cyc

°C