1/4
www.rohm.com
○
c 2012 ROHM Co., Ltd. All rights reserved. 2012.11 - Rev.D
High Power Chip Resistors < Wide Terminal type >
LTR Series
Features
1) High joint reliability with long side terminations.
2) Highest power ratings in their class.
3) Guaranteed anti-surge characteristic in all series.
4) ROHM resistors have obtained ISO9001 / ISO / TS16949 certification.
5) Corresponds to AEC-Q200. (LTR18/50)
Products List
Limiting Element
Voltage
(V)
Maximum
Overload
Voltage
(V)
Temperature
Coefficient
(ppm /
°C
)
Resistance
Tolerance
(%)
Operating
Temperature
Range
(
°C
)
Resistance Range SeriesPart No.
Rated Power
(70
˚C)
(W)
2012
3216
5025
6432
0805
1206
2010
2512
∗Please contact ROHM sales representative for high power type.
D
esign and specifications are subject to change without notice.
Carefully check the specification sheet supplied with the product before using or ordering it.
Size
(mm) (inch)
LTR10 150
200
200
200 400
400
400
300
0.25
LTR18
LTR50
LTR100
0.5
∗
1
2
−55 to +155
F(±1%)
D(±0.5%)
J(±5%)
E24
±200
±100
±100
F(±1%)
D(±0.5%)
J(±5%)±200
±100
±100
F(±1%)
D(±0.5%)
J(±5%)±200
±100
±100
F(±1%)
D(±0.5%)
J(±5%)±200
±100
±100
1MΩ
to
1Ω
1MΩ
to
1Ω
1MΩ
to
1Ω
1MΩ
to
10Ω
1MΩ
to
10Ω
1MΩ
to
10Ω
1MΩ
to
1Ω
1MΩ
to
10Ω
Part Number Description
LTR
(High Power Chip Resistors
/ Wide Terminal type)
Resistance code, 3 or 4 digits.
000 denotes jumper type.
Ex.) 1Ω = 1R00 ( ±1% )
1R0 ( ±5% )
9.1Ω = 9R10 ( ±1% )
9R1 ( ±5% )
10 Ω = 10R0 ( ±1%, ±0.5%
)
100 ( ±5%
)
1M Ω = 1004 ( ±1%, ±0.5%
)
105 ( ±5%
)
10 (2012 [0805])
18 (3216 [1206])
50 (5025 [2010])
100 (6432 [2512])
D ( ±0.5% )
F ( ±1% )
J ( ±5% )
1 8 EPZ
TLR J01 5
Paper tape
(4mm Pitch)
Packaging
specifications
CodePart No.
Paper tape
(4mm Pitch)
Embossed tape
(4mm Pitch)
Embossed tape
(4mm Pitch)
Part No. Packaging Specifications Code
Size
(mm [inch])
Resistance
Tolerance
Nominal Resistance
D,F
J:
:4 digits
3 digits
Resistance
tolerance Resistance
code
EZP
LTR10 5,000
EZP
LTR18 5,000
UZP
LTR50 5,000
JZPLTR100 4,000
Quantity
/ Reel
2/4
www.rohm.com
○
c 2012 ROHM Co., Ltd. All rights reserved. 2012.11 - Rev.D
Data Sheet LTR Series
Chip Resistor Dimensions and Markings
<Marking method>
There are three or four digits used for the calculation number
according to IEC code and “R”is used for the decimal point.
Part No. (mm) L W t a b Marking
existence
(Unit : mm)
Yes
Yes
Yes
No
(inch)
0805
1206
2010
2512
2012
3216
5025
6432
LTR10
LTR18
LTR50
LTR100
1.2±0.1 2.0±0.1 0.55±0.1 0.2±0.1 0.35±0.2
1.6±0.15 3.2±0.15 0.55±0.1 0.3±0.2
2.5±0.15 5.0±0.15 0.55±0.1 0.38±0.2 0.9±0.2
3.2±0.15 6.4±0.15 0.55±0.15 0.4±0.25 1.13±0.25
0.5±0.2
Land pattern Example
B
D
ALand
C
A
LTR10
LTR18
LTR50
LTR100
0.50
0.60
0.75
B
2.70
2.90
3.35
C
2.00
3.20
5.00
D
1.10
1.15
1.30
0.83 3.69 6.40 1.43
(Unit : mm)
Dimensions
Part No.
L
a
a
b
b
Wt
103
3/4
www.rohm.com
○
c 2012 ROHM Co., Ltd. All rights reserved. 2012.11 - Rev.D
Data Sheet LTR Series
Test Items Test Conditions
Resistor Type
Guaranteed Value
Endurance at 70°C
Endurance
Bend strength of
the end face plating
Resistance to solvent
± (2.0%+0.1Ω)
± (1.0%+0.05Ω)
± (3.0%+0.1Ω)
See P.1
See P.1
20°C
No remarkable abnormality on the appearance.
A new uniform coating of minimum of
95% of the surface being immersed
and no soldering damage.
Without mechanical damage such as breaks.
Compliance Standard(s) : IEC60115−
8
JISC 5201−
8
Measurement :
+20 / −55 / +20 / +125°C
Soldering condition : 260±5°C
Duration of immersion : 10±1s
40°C, 93%RH (Relative Humidity)
Test time : 1,000h to 1,048h
± (3.0%+0.1Ω)
± (3.0%+0.1Ω)
± (1.0%+0.05Ω)
± (1.0%+0.05Ω)
± (1.0%+0.05Ω)
70°C
Rated voltage (current)
1.5h : ON − 0.5h : OFF
Test time : 1,000h to 1,048h
155°C
Test time : 1,000h to 1,048h
23±5°C, Immersion cleaning, 5±0.5min
Solvent : 2−propanol
EIAJ ED-4701 / 300 TEST METHOD304
Voltage : 3kV
C : 100pF
R : 1.5kΩ
Apply cycle : 1time
−
Static electric
characteristics ± (5.0%+0.05Ω)
Test temp. : −55°C to +125°C 5cycle
Rosin·Ethanol : 25% (Weight)
Soldering condition : 235±5°C
Duration of immersion : 2.0±0.5s
Rated voltage (current) ×2.5, 2s
Maximum overload voltage
Variation of resistance
with temperature
Resistance
Overload
Solderability
Resistance to
soldering heat
Rapid change of
temperature
Damp heat, steady state
Derating Curve
When the ambient temperature exceeds 70°C, power dissipation must be adjusted according to the derating curves below.
LTR10 / 18 / 50 / 100
0
20
40
60
80
100
−55 0 70 100 155
AMBIENT TEMPERATURE (°C)
PERCENT RATED POWER (%)
Characteristics
Chip weight (typical value)
mg/pc 5.58 10.02 24.18
Unit LTR10 LTR18 LTR50 LTR100
Weight
Parameter
38.15
4/4
www.rohm.com
○
c 2012 ROHM Co., Ltd. All rights reserved. 2012.11 - Rev.D
Data Sheet LTR Series
Tape Dimensions
Paper Tape
Embossed Tape
A
0
P
1
P
0
P
2
B
0
F
W
K
E
φD0
P0
P2P1
E
FW
T2
φD0
A0
B0
Base paper
(Bottom tape)
Components Cavity
Top tape
1.45±0.1 2.3±0.1
1.95
+0.1
−0.05
3.5
+0.15
−0.05
(Unit : mm
)
WPart No. F E A
0
B
0
8.0±0.3LTR10 3.5±0.05 1.75±0.1
8.0±0.3LTR18 3.5±0.05 1.75±0.1
φ1.5 +0.1
0
φ1.5 +0.1
0
2.0±0.05
2.0±0.05
Max 1.1
Max 1.1
D
0
Part No. P
0
P
1
P
2
T
2
4.0±0.1
4.0±0.1
LTR10 4.0±0.1
LTR18 4.0±0.1
3.4±0.2 5.6±0.2
3.5±0.2 6.7±0.2
(Unit : mm
)
WPart No. F E A
0
B
0
12.0±0.3LTR50 5.5±0.05 1.75±0.1
12.0±0.3 5.5±0.05 1.75±0.1
φ1.5 +0.1
0
φ1.5 +0.1
0
2.0±0.05
2.0±0.05
Max 1.1
Max 1.1
D
0
Part No. P
0
P
1
P
2
T
2
4.0±0.1
4.0±0.1
LTR50 4.0±0.1
LTR100 4.0±0.1
LTR100
Reel Dimensions
0 2
0 4
0 6
0 8
0 2
0 4
0 6
0 8
C
ABD
Label
APart No. B C D
(Unit : mm
)
φ13±0.2
LTR10
LTR18
LTR50
LTR100
9 +1.0
0
13 +1.0
0
φ180 0
−1.5 φ60 +1.0
0
ACCORDING TO EIAJ ET-7200
B
R1120A
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
Notice
ROHM Customer Support System
http://www.rohm.com/contact/
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
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.
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, commu-
nication 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, fuel-
controller 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.
