High power thick film shunt resistors
LTR series・ LHR series (low TCR)
Datasheet
●Features
1)Chip Resistors for current detection : 10mΩ ~
2)High joint reliability with long side terminations.
3)Improvement of rated power enables to displace smaller size of resistors,and
it contributes space savings in your set.
4)ROHM resistors have obtained ISO9001 / IATF16949 certification.
5)Corresponds to AEC-Q200.
●Products list
Size
mm
(inch)
Part No.
Rated power
(70℃)
Resistance
tolerance
Resistance range
(ppm / ℃)
0～125
0～100
0～75
(Ω)
33m～39m (E24 series)
43m～270m (E24 series)
(E24 series)
300m～1.0
(W)
LHR18
1632
(0612)
1.25
F ( ±1% )
J ( ±5% )
LTR10
1220
(0508)
0.5
F ( ±1% )
J ( ±5% )
LTR18
1632
(0612)
1.0
F ( ±1% )
J ( ±5% )
LTR50
2550
(1020)
2.0
F ( ±1% )
J ( ±5% )
LTR100
3264
(1225)
2.0
3264
(1225)
4.0
☆ LTR100L
Temperature
coefficient
F ( ±1% )
J ( ±5% )
F ( ±1% )
J ( ±5% )
±150
47m～9.1
(E24 series)
0～300
0～200
0～150
±100
0～300
0～200
0～150
±100
0～+150
0～+100
±200
0～300
0～200
0～150
10m～18m
20m～47m
51m～470m
510m～1.0
10m～18m
20m～47m
51m～91m
100m～910m
100m～180m
200m～910m
100m～910m
10m～18m
20m～47m
51m～91m
(E24 series)
(E24 series)
(E24 series)
(E24 series)
(E24 series)
(E24 series)
(E24 series)
(E24 series)
(E24 series)
(E24 series)
(E24 series)
(E24 series)
(E24 series)
(E24 series)
Operating
temperature
range
(℃)
-55 ～ +155
-55 ～ +155
-55 ～ +155
-55 ～ +155
-55 ～ +155
-65 ～ +155
*Design and specifications are subject to change without notice.
Carefully check the specification sheet supplied with the product before using or ordering it.
☆：New product
● Part number description
L T R
1 8
Part No.
Size mm (inch)
LTR
(High power
thick film shunt
resistors wide
terminal type)
10
18
50
100
100L
LHR
(High power
thick film shunt
resistors wide
terminal type
/Low TCR)
1220 (0508)
1632 (0612)
2550 (1020)
3264 (1225)
3264 (1225)
EZ P
J
Packaging specifications code
Part No. Code
Packaging
Quantity
specifications / Reel
LHR18 EZP
Paper tape
(4mm Pitch)
5,000
LTR10 EVH
Paper tape
(4mm Pitch)
5,000
LTR18 EZP
Paper tape
(4mm Pitch)
5,000
LTR50 UZP
Embossed tape
(4mm Pitch)
5,000
LTR100
Embossed tape
JZP
LTR100L
(4mm Pitch)
4,000
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Resistance
tolerance
F (±1%)
J (±5%)
L
Special
part code
U ： 10m
S ： 11m～91m
L ： 100m～
(Ω)
1R0
Nominal resistance
Resistance code, 3 or 4digits.
Resistance
tolerance Resistance
+
code
Special code
FU, FS,FL, JS ： 4 digits
JU, JL
： 3 digits
2021.06 - Rev.M
LTR series ・ LHR series (low TCR) -low ohmic-
Datasheet
●Chip resistor dimensions and markings
■ LHR18
■ LTR10
■ LTR18
■ LTR50
LTR100
LTR100L
There are four digits used for the calculation
number according to IEC code.“L” means
decimal point of mΩ unit in case resistance
value is 0.01Ω or less.“R” means decimal point
of Ω unit in case resistance value is above 0.01Ω
.
Example :
4digits……10mΩ=10L0, 100mΩ=R100
3digits……100mΩ=R10, 1Ω=1R0
(Unit:mm)
t
a
b
Marking
existence
3.2±0.10
0.58±0.10
0.30±0.20
0.50±0.20
Yes
1.2±0.10
2.0±0.10
0.55±0.10
0.30±0.20
0.35±0.20
Yes
0612
1.6±0.10
3.2±0.10
0.58±0.10
0.50±0.20
0.50±0.20
No
2550
1020
2.5±0.15
5.0±0.15
0.58±0.15
0.38±0.20
0.90±0.20
Yes
LTR100
3264
1225
3.2±0.15
6.4±0.15
0.55±0.15
0.40±0.25
1.13±0.25
No
LTR100L
3264
1225
3.1±0.15
6.4±0.15
0.58±0.15
0.50±0.25
1.00±0.25
No
Part No.
mm
(inch)
L
LHR18
1632
0612
1.6±0.10
LTR10
1220
0508
LTR18
1632
LTR50
W
●Land pattern example
(Unit:mm)
Dimensions
A
B
C
D
LTR10
0.50
1.98
2.20
0.74
LTR18
LHR18
0.55
2.91
3.20
1.18
LTR50
0.80
3.36
5.00
1.28
LTR100
LTR100L
0.89
5.01
6.40
2.06
Part No.
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2021.06 - Rev.M
LTR series ・ LHR series (low TCR) -low ohmic-
Datasheet
●Derating curve
When the ambient temperature exceeds 70°C, power dissipation must be adjusted according to the derating curves below.
Fig.1
Fig.2
■LHR18, LTR10 / 18 / 50 / 100 / 100L
■LTR100L
*LTR100L
For resistors operated at the
ambient temperature in excess
70℃ or terminal temperature in
excess 110℃, the load shall
derated in accordance with Fig.1
and Fig.2
*LTR100L： -65℃～+155℃
●Characteristics
Guaranteed value
Resistor type
Test items
Test conditions
20℃
Measuring method : Measuring under termination by 4
proves.
Resistance
See P.1
Variation of resistance
with temperature
See P.1
■LHR18, LTR10/18/50 ： +25℃/-55℃/+155℃
■LTR100 ： +25℃/-55℃/+125℃
■LTR100L ： +25℃/-65℃/+155℃
■LHR18, LTR10/18/100 ：
Overload
Solderability
Resistance to
soldering heat
■LHR18, LTR10/18/50/100 ： ±2.0％
■LTR100L ： ±1.0％
Anew uniform coating of minimum of 95% of
the surface being immersed and no
soldering damage.
±1.0％
No remarkable abnormality on the appearance.
Rapid change of
temperature
Damp heat, steady state
Endurance at 70℃
Endurance
Rosin-ethanol solution(25% mass)
Soldering condition： 245±5℃
Duration of immersion： 2.0±0.5s
Soldering condition： 260±5℃
Duration of immersion： 10±1s
±1.0％
■LTR10/18/100 ： -55℃～+125℃ 5cycles
■LHR18, LTR50/100L ： -55℃～+125℃ 1000cycles
±3.0％
■LHR18, LTR10/18/50/100
40℃，93％(Relative humidity) Test time： 1,000h
■LTR100L
85 ℃，85％(Relative humidity) Test time： 1,000h
■LHR18, LTR10/18/50/100 ： ±3.0％
■LTR100L ： ±1.0％
■LHR18，LTR10/18/50/100
Ambient temperature ： 70℃
■LTR100L
Ambient temperature ： 70℃
Terminal temperature ： 110℃
■LHR18, LTR10/18/50/100 ： ±3.0％
■LTR100L ： ±1.0％
Rated voltage (current) ： 1.5h:ON－0.5h:OFF
Test time ： 1,000h
155℃
Test time： 1,000h
23±5℃, Immersion cleaning, 5±0.5min
Solvent: 2-propanol
±1.0％
Resistance to solvent
Bend strength of
the end face plating
Rated voltage(current)×2.5，2s
■LTR50 ： Rated power×5.0，5s
■LTR100L ： Rated power×4.0，5s
Without mechanical damage such as breaks.
-
Compliance Standard(s) :IEC 60115-1 / IEC 60115-8
JIS C 5201-1 / JIS C 5201-8
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2021.06 - Rev.M
LTR series ・ LHR series (low TCR) -low ohmic-
Datasheet
●Tape dimensions
■Paper tape
A0
(Unit : mm)
B0
3.5±0.05 1.75±0.1
1.45±0.1
2.3±0.1
3.5±0.05 1.75±0.1
1.95
Part No.
W
F
E
LTR10
8.0±0.3
LTR18
LHR18
8.0±0.3
Part No.
D0
P0
P1
LTR10
+0.1
Φ1.5
0
4.0±0.1
4.0±0.1
2.0±0.05 MAX1.1
LTR18
LHR18
Φ1.5
+0.1
0
4.0±0.1
4.0±0.1
2.0±0.05 MAX1.1
F
E
+0.1
-0.05
P2
■Embossed tape
3.5
+0.15
-0.05
T2
A0
(Unit : mm)
B0
5.5±0.05 1.75±0.1
3.4±0.2
5.6±0.2
5.5±0.05 1.75±0.1
3.5±0.2
6.7±0.2
P2
K
Part No.
W
LTR50
12.0±0.3
LTR100
LTR100L
12.0±0.3
Part No.
D0
P0
P1
LTR50
+0.1
Φ1.5
0
4.0±0.1
4.0±0.1
2.0±0.05 MAX1.1
LTR100
LTR100L
Φ1.5 +0.1
0
4.0±0.1
4.0±0.1
2.0±0.05 MAX1.1
●Reel dimensions
Using two kinds of reels for taping.
Part No.
A
B
LTR10
LTR18
LHR18
LTR50
(Unit : mm)
D
9 +1.0
0
Φ180 0
-1.5
Φ60 +1
0
Φ13±0.2
13
LTR100
LTR100L
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4/4
+1.0
0
2021.06 - Rev.M
Datasheet
Notice
Precaution on using ROHM Products
1. If you intend to use our Products in devices requiring extremely high reliability (such as medical equipment(Note 1),
aircraft/spacecraft, nuclear power controllers, etc.) and whose malfunction or failure may cause loss of human life,
bodily injury or serious damage to property (“Specific Applications”), please consult with the ROHM sales
representative in advance. Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way
responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of
any ROHM’s Products for Specific Applications.
(Note1) Medical Equipment Classification of the Specific Applications
JAPAN
USA
EU
CHINA
CLASSⅢ
CLASSⅡb
CLASSⅢ
CLASSⅢ
CLASSⅣ
CLASSⅢ
2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor
products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities,
adequate safety measures including but not limited to fail-safe design against the physical injury, damage to any
property, which a failure or malfunction of our Products may cause. The following are examples of safety measures:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure
3.
Our Products are not designed under any special or extraordinary environments or conditions, as exemplified below.
Accordingly, ROHM shall not be in any way responsible or liable for any damages, expenses or losses arising from
the use of any ROHM’s Products under any special or extraordinary environments or conditions. If you intend to use
our Products under any special or extraordinary environments or conditions (as exemplified below), your
independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary:
[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents
[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust
[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including
Cl2, H2S, NH3, SO2, and NO2
[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves
[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items
[f] Sealing or coating our Products with resin or other coating materials
[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue
of flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for
cleaning residue after soldering
[h] Use of the Products in places subject to dew condensation
4.
The Products are not subject to radiation-proof design.
5.
Please verify and confirm characteristics of the final or mounted products in using the Products.
6.
In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied,
confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power
exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively
affect product performance and reliability.
7.
De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the
actual ambient temperature.
8.
Confirm that operation temperature is within the specified range described in the product specification.
9.
ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined
in this document.
Precaution for Mounting / Circuit board design
1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect
product performance and reliability.
2.
In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must
be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products,
please consult with the ROHM representative in advance.
For details, please refer to ROHM Mounting specification
Notice-PAA-E
© 2021 ROHM Co., Ltd. All rights reserved.
Rev.001
Datasheet
Precautions Regarding Application Examples and External Circuits
1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of
the characteristics of the Products and external components, including transient characteristics, as well as static
characteristics.
2. You agree that application notes, reference designs, and associated data and information contained in this
document are presented only as guidance for Products use. Therefore, in case you use such information, you are
solely responsible for it and you must exercise your own independent verification and judgment in the use of such
information contained in this document. ROHM shall not be in any way responsible or liable for any damages,
expenses or losses incurred by you or third parties arising from the use of such information.
Precaution for Electrostatic
This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take
proper caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will
not be applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment /
solder iron, isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).
Precaution for Storage / Transportation
1. Product performance and soldered connections may deteriorate if the Products are stored in the places where:
[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2
[b] the temperature or humidity exceeds those recommended by ROHM
[c] the Products are exposed to direct sunshine or condensation
[d] the Products are exposed to high Electrostatic
2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time
period may be degraded. It is strongly recommended to confirm solderability before using Products of which
storage time is exceeding the recommended storage time period.
3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent
leads may occur due to excessive stress applied when dropping of a carton.
4. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using
Products of which storage time is exceeding the recommended storage time period.
Precaution for Product Label
QR code printed on ROHM Products label is for ROHM’s internal use only.
Precaution for Disposition
When disposing Products please dispose them properly using an authorized industry waste company.
Precaution for Foreign Exchange and Foreign Trade act
Since concerned goods might be fallen under listed items of export control prescribed by Foreign exchange and
Foreigntrade act, please consult with ROHM in case of export.
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1. All information and data including but not limited to application example contained in this document is for
reference only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property
rights or any other rights of any third party regarding such information or data.
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or any third parties with respect to the Products or the information contained in this document. Provided, however,
that ROHM will not assert its intellectual property rights or other rights against you or your customers to the extent
necessary to manufacture or sell products containing the Products, subject to the terms and conditions herein.
Other Precaution
1. This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.
2. The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior
written consent of ROHM.
3. In no event shall you use in any way whatsoever the Products and the related technical information contained in
the Products or this document for any military purposes, including but not limited to, the development of
mass-destruction weapons.
4. The proper names of companies or products described in this document are trademarks or registered trademarks
of ROHM, its affiliated companies or third parties.
Notice-PAA-E
© 2021 ROHM Co., Ltd. All rights reserved.
Rev.001
Datasheet
General Precaution
1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents.
ROHM shall not be in any way responsible or liable for failure, malfunction or accident arising form the use of any
ROHM’s Products against warning, caution or note contained in this document.
2.
All information contained in this document not is current as of the issuing date and subject to change without any
prior notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM
sales representative.
3.
The information contained in this document is provided on an “as in” basis and ROHM does not warrant that all
information contained in this document is accurate and/or error-free. ROHM shall not be in any way responsible or
liable for any damages, expenses or losses incurred by you or third parties resulting form inaccuracy or errors of
or concerning such information.
Notice – WE
© 2021 ROHM Co., Ltd. All rights reserved.
Rev.001
