ROHM MCR25JZHJS Technical data

Low Ohmic Thick Film Chip Resistors

MCR25 (3225 size (1210 size) : 1 / 2W)

Features

1) Highly reliable chip resistor
Ruthenium oxide resistive material offers superior resistance to the elements.

2) Electrodes not corroded by soldering
Suitable for re-flow soldering.

3) ROHM resistors have approved ISO9001- / ISO/TS 16949- 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

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°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 = P × R

100

80

60

40

POWER LOAD (%)

20

0

−55 0 70 100 125

AMBIENT TEMPERATURE (°C)

Fig.1

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

Table 1

Resistance tolerance

F (±1%)

Special code

L

S

J (±5%)

L

S

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.

Resistance range

(Ω)

0.1 to 9.1

0.047 to 0.091

0.1 to 0.91 ±200

0.047 to 0.091

Resistance temperature coefficient

(ppm / ˚C)

(E24)

(E24)

±200

300±300

(E24)

(E24)

300±300

0.5W (1 / 2W)

at 7

0°C

Limiting element voltage 2.13(9.1Ω)

−55°C to +155°C

www.rohm.com

1/3

○c 2011 ROHM Co., Ltd. All rights reserved.

2011.12 - Rev.E

MCR25 (3225 size (1210 size) : 1 / 2W)

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)

1

0.5±0.25

0.5±0.25

3.2±0.15

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.

2

3

4

5

0.55±0.1

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)

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

125
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

Material

2.5±0.15

6

www.rohm.com

2/3

○c 2011 ROHM Co., Ltd. All rights reserved.

2011.12 - Rev.E