High Power Low Ohmic Chip Resistors<Wide Terminal type>
LTR10 (2012 size : 1 / 2W)
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
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
155
AMBIENT TEMPERATURE (
°
C)
Fig.1
Rated voltage
Rated current
The voltage rating is calculated by the following equation.
E=
I =
P
×
R
P/R
E : Rated voltage (V)
I : Rated current (A)
P : Rated power (W)
R : Nominal resistance (Ω)
Nominal resistance
Operating temperature
Table 1
Resistance range
(Ω)
See Table 1.
−55°
C to
+ 155°C
Resistance
tolerance
F (±1%)
J (±5%)
Special part number
Resistance temperature coefficient
(ppm/°C)
0.047 to 9.1
S
L
±150
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.
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c
○
2009 ROHM Co., Ltd. All rights reserved.
1/3
2009.10 - Rev.B
LTR10
Characteristics
Item
Guaranteed value
Resistor type
Test conditions (JIS C 5201-1)
JIS C 5201-1 4.5
Voltage : A
Measuring method : Measure under termination by 4 probes
Under termination
Terminal
Data Sheet
Resistance
F :
±1%
J :
±5%
Variation of resistance
with temperature
See Table.1
JIS C 5201-1 4.8
Measurement :
−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 : 1,000h to 1,048h
JIS C 5201-1 4.25.1
Rated voltage (current), 70°C
1.5h : ON
−
0.5h : OFF
Test time : 1,000h to 1,048h
JIS C 5201-1 4.25.3
155°C
Test time : 1,000h to 1,048h
JIS C 5201-1 4.29
23±5°C, Immersion cleaning, 5±0.5min.
Solvent : 2-propanol
JIS C 5201-1 4.33
Overload
±
(2.0%+0.1Ω)
Solderability
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)
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
±
(3.0%+0.005Ω)
Resistance to solvent
Bend strength of
the end face plating
±
(0.5%+0.005Ω)
Without open.
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c
○
2009 ROHM Co., Ltd. All rights reserved.
2/3
2009.10 - Rev.B
LTR10
Dimensions
(Unit : mm)
Data Sheet
3
4
5
W
a
2
No.
b
6
1
2
Material
Resistive element
Silver thick film electrode
Silver thick film side electrode
Nickel electrode
Sn electrode
Overcoating
Alumina substrate
R10
a
L
1
7
b
t
3
4
5
6
Size code
2012 (0805)
L
1.2
±
0.1
W
2.0
±
0.1
t
0.55
±
0.1
a
0.3
±
0.2
b
0.35
±
0.2
7
Packaging
Reel
Taping
P
0
P
2
P
1
φD
0
E
F
W
08
06
04
02
02
04
06
08
A
B
D
A
0
Heat crimp cover/Tape
Thick paper (Underside paper tape) Chip resistor Square punchout hole
mount
T
2
C
Label
EIAJ ET-7200B compliant
(Unit: mm)
(Unit: mm)
A
φ180
0
−1.5
B
+1
φ60
0
9
C
+1.0
0
D
φ13±0.2
W
8.0±0.3
D
0
φ1.5
+0.1
0
F
3.5±0.05
P
0
4.0±0.1
E
1.75±0.1
P
1
4.0±0.1
A
0
1.65
+0.2
−0.1
B
0
2.4
+0.2
−0.1
P
2
2.0±0.05
T
2
Max. 1.1
Part No. Explanation
L T R 1 0
Part No.
E V H
F
J
J
S
Nominal resistance
Resistance code, 3 or 4 digits.
Resistance tolerance Special part number
±
1%
±
5%
S
0.011 to 0.091
Ω
L
0.1
Ω
Resistance
tolerance
FS, FL, JS
:
JL
:
Resistance
code
4 digits
3 digits
Packaging Specifications Code
Part No.
LTR10
Code
EVH
Resistance tolerance
F(
±
1%)
J(
±
5%)
Packaging specifications
Paper tape (4mm Pitch)
Reel
φ180mm
(7inch)
Basic ordering unit
(pcs)
5,000
Reel (φ180mm) : Compatible with JEITA standard "EIAJ ET-7200B"
: Standard product
www.rohm.com
c
○
2009 ROHM Co., Ltd. All rights reserved.
3/3
2009.10 - Rev.B
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified 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 specifications,
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 specified 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 specified 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.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, commu-
nication devices, electronic appliances and amusement devices).
The Products specified 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, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire 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
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