MCR25
Resistors
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
Rated power
Conditions
Power must be derated according to the power derating curve in
Figure 1 when ambient temperature exceeds 70°C.
100
80
POWER LOAD (%)
Specifications
0.5W (1 / 2W)
at 70°C
60
40
20
0
-55
0
70
100
125
AMBIENT TEMPERATURE (˚C)
Fig.1
Rated voltage
The voltage rating is calculated by the following equation.
E=
P
×
R
E: Rated voltage (V)
P: Rated power (W)
R: Nominal resistance (Ω)
Nominal resistance
Operating temperature
See Table 1.
−55°C
to
+125°C
Table 1
Resistance tolerance Special code
F (±1%)
L
S
J (±5%)
L
S
Resistance range
(Ω)
0.1 to 9.1
(E24)
Resistance temperature coefficient
(ppm / ˚C)
±200
300±300
±200
300±300
0.047 to 0.091 (E24)
0.1 to 0.91
(E24)
0.047 to 0.091 (E24)
•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.
Rev.D
1/4
MCR25
Resistors
Characteristics
Item
Resistance
J :
±5%
F :
±1%
Guaranteed value
Resistor type
Test conditions (JIS C 5201-1)
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
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)
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
Test temp. :
−55°C
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
125°C
Test time : 1,000h to 1,048h
JIS C 5201-1 4.29
23°C±5°C
Solvent : 2-propanol
JIS C 5201-1 4.33
Solderability
Resistance to
soldering heat
Rapid change of
temperature
Damp heat, steady state
±
(3.0%+0.005Ω)
Endurance at 70°C
±
(3.0%+0.005Ω)
Endurance
±
(0.5%+0.005Ω)
Component solvent
resistance
Bend strength of
the end face plating
Without open.
Rev.D
2/4
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level
of reliability and the malfunction of which would directly endanger human life (such as medical
instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers
and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow
for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in
order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM
cannot be held responsible for any damages arising from the use of the products under conditions out of the
range of the specifications or due to non-compliance with the NOTES specified in this catalog.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact your nearest sales office.
ROHM
Customer Support System
www.rohm.com
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