Page 1
Table 1
R
t
High Power Chip Resistors
<Wide Terminal type>
LTR10 (2012 size : 1 / 4W)
Features
1) Improved welding strength
The structure of longer electrodes provides the wider welding area than the chip resistors with normal electrodes, and this
enhanced the solder welding strength.
2) Increased surge-resistance
This is achieved by Rohm’s original trimming technology plus resistive element patterning.
3) High-power tolerance
Two times of the rated power is guaranteed than the normal-electrode resistors.
4) ROHM resistors are ISO-9001 & ISO/TS16949 certified.
Design and specifications are subject to change without notice. Carefully check the specification sheet before using or
ordering it.
Applications
Automotive, industrial and power supply.
Ratings
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 TEMPERATURE (°C)
Fig.1
C
.
0.25W (1 / 4W)
at 70°C
Rated voltage
Nominal resistance
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
See Table 1.
P: Rated power (W)
R: Nominal resistance (Ω)
Limiting element voltage 150V
C to + 155°C
−55°
esistance tolerance
D (±0.5%)
F (±1%)
J (±5%)
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Resistance range
(Ω)
10 to 1M
1 to 1M (E24)
Resistance temperature coefficien
(ppm/°C)
±100
±100
±200
2010.06 - Rev.D
Page 2
n.
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.
Characteristics
Resistance
Variation of resistance
with temperature
Overload
Item Test conditions (JIS C 5201-1)
Guaranteed value
Resistor type
J : ±5%
F : ±1%
D : ±0.5%
See Table.1
± (2.0%+0.1Ω)
JIS C 5201-1 4.5
JIS C 5201-1 4.8
Measurement : −55 / +25 / +125°C
JIS C 5201-1 4.13
Rated voltage (current) ×2.5, 2s.
Maximum overload voltage : 200V
Data Sheet LTR10
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
Static electric
characteristics
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.
± (5.0%+0.05Ω)
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 to 1,048h
JIS C 5201-1 4.25.1
Rated voltage (current), 70
1.5h : ON − 0.5h : OFF
Test time : 1,000h to 1,048h
JIS C 5201-1 4.25.3
°C
155
Test time : 1,000h to 1,048h
JIS C 5201-1 4.29
23±5
°C
, Immersion cleaning, 5±0.5mi
Solvent : 2-propanol
JIS C 5201-1 4.33
EIAJ ED-4701/300 Test method 304
Voltage : 3kV
C : 100pF
R : 1.5kΩ
Apply cycle : 1 time
°C
to +125°C 5cyc
°C
°C
°C
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2010 ROHM Co., Ltd. All rights reserved.
2010.06 - Rev.D
Page 3
R
P
Dimensions (Unit : mm)
2
0.35
4
0.55±0.1
0.35 ± 0.2
± 0.2
1.2 ± 0.1
2.0 ± 0.1
3
6
1
1.2 ± 0.1
0.25 ± 0.2
Size code L W t ba
1.2
2012 ( 0805)
± 0.1 0.2 ± 0.10.55 ± 0.1
2.0
± 0.1
Packaging
Reel Taping
ABD
0 2
0 4
0 6
0 8
C
ABCD
φ180
0
−1.5
φ60
+1
0
+1.0
9
0
Label
EIAJ ET-7200B compliant
(Unit: mm)
φ13±0.2
0 2
0 4
0 6
0 8
Part designation
No.
Resistive element
1
5
Thick paper
mount
8.0±0.3 3.5±0.05 1.75±0.1
φ1.5
(Oxide metal thick film)
2
Silver thick film electrode
3
Nickel electrode
4
Sn electrode
5
Alumina substrate
6
Overcoating (Resin)
Heat crimp cover/Tape
(Underside paper tape) Chip resistor Square punchout hole
WFEA0 B0
D0 P0 P1 P2 T2
+0.1
4.0±0.1 4.0±0.1 2.0±0.05 Max. 1.1
0
P0
P2 P1
Material
A0
φD0
1.65
+0.2
−0.1
F
(Unit: mm)
+0.2
2.4
−0.1
Data Sheet LTR10
E
W
T
2
TLR10
Part No.
E Z P J
Resistance tolerance
J
Nominal resistance
±
5%
±
1%F
±
0.5%D
Resistance code, 3 or 4 digits.
Resistance
tolerance
J
F
D
Resistance
:
:
:
code
3 digits
4 digits
4 digits
ackaging Specifications Code
Part No.
eel (φ180mm) : Compatible with JEITA standard "EIAJ ET-7200B"
: Standard product
Code Packaging specifications Reel
EZP Paper tape (4mm Pitch) φ180mm (7inch)LTR10
Resistance tolerance
D(±0.5%) F(±1%) J(±5%)
Basic ordering unit
(pcs)
5,000
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2010 ROHM Co., Ltd. All rights reserved.
2010.06 - Rev.D
Page 4
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specied herein is subject to change for improvement without notice.
The content specied herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specied in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specied herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
Notice
The Products specied in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, ofce-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specied in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, re or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, re control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specied herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
http://www.rohm.com/contact/
R1010
A
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