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
Size
Part No.
(mm) (inch)
Rated Power Limiting Element
(70˚C)
Voltage
(W)
(V)
Maximum
Overload
Voltage
(V)
Temperature Resistance
Coefficient Tolerance Resistance Range
(ppm /
°C)
±200
±100
±100
±200
Series
(%)
J(±5%)
F(±1%)
D(±0.5%)
J(±5%)
1Ω
F(±1%)
D(±0.5%)
J(±5%)
1Ω
F(±1%)
D(±0.5%)
J(±5%)
1Ω
F(±1%)
D(±0.5%)
10Ω
to
to
1MΩ
1MΩ
10Ω
to
to
1MΩ
1MΩ
10Ω
to
to
1MΩ
1MΩ
E24
10Ω
1Ω
to
to
1MΩ
1MΩ
Operating
Temperature
Range
(°C)
LTR10
2012 0805
0.25
150
300
LTR18
3216 1206
0.5
∗
200
400
±100
±100
±200
−55
to
+155
LTR50
5025 2010
1
200
400
±100
±100
±200
±100
±100
LTR100
6432 2512
2
200
400
∗Please
contact ROHM sales representative for high power type.
Design and specifications are subject to change without notice.
Carefully check the specification sheet supplied with the product before using or ordering it.
Part Number Description
L T R
Part No.
1 8
Size
(mm [inch])
10 (2012
[0805])
18 (3216
[1206])
50 (5025
[2010])
100 (6432
[2512])
Part No.
E Z P
Packaging Specifications Code
Code
Packaging
specifications
Paper tape
(4mm Pitch)
Paper tape
(4mm Pitch)
Embossed tape
(4mm Pitch)
Embossed tape
(4mm Pitch)
J
Quantity
/ Reel
1 0 5
Nominal Resistance
Resistance code, 3 or 4 digits.
000 denotes jumper type.
Resistance
tolerance
D,F
J
:
:
Resistance
code
4 digits
3 digits
LTR
(High Power Chip Resistors
/ Wide Terminal type)
Resistance
Tolerance
D (
±0.5%
)
F (
±1%
)
J (
±5%
)
LTR10
LTR18
LTR50
LTR100
EZP
EZP
UZP
JZP
5,000
5,000
5,000
4,000
Ex.)
1Ω = 1R00
1R0
9.1Ω = 9R10
9R1
10
Ω
= 10R0
100
1M
Ω
= 1004
105
(
±1%
)
(
±5%
)
(
±1%
)
(
±5%
)
(
±1%, ±0.5%
)
(
±5%
)
(
±1%, ±0.5%
)
(
±5%
)
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○
2012 ROHM Co., Ltd. All rights reserved.
1/4
2012.11 - Rev.D
LTR Series
Derating Curve
Data Sheet
When the ambient temperature exceeds 70°C, power dissipation must be adjusted according to the derating curves below.
LTR10 / 18 / 50 / 100
100
PERCENT RATED POWER (%)
80
60
40
20
0
−55
0
70
100
AMBIENT TEMPERATURE (°C)
155
Characteristics
Test Items
Resistance
Variation of resistance
with temperature
Overload
Guaranteed Value
Resistor Type
See P.1
See P.1
±
(2.0%+0.1Ω)
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)
20°C
Measurement :
+20
/
−55
/
+20
/
+125°C
Rated voltage (current)
×2.5,
2s
Maximum overload voltage
Rosin·Ethanol : 25% (Weight)
Soldering condition : 235±5°C
Duration of immersion : 2.0±0.5s
Soldering condition : 260±5°C
Duration of immersion : 10±1s
Test temp. :
−55°C
to
+125°C
5cycle
40°C, 93%RH (Relative Humidity)
Test time : 1,000h to 1,048h
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
Test Conditions
Solderability
Resistance to
soldering heat
Rapid change of
temperature
Damp heat, steady state
Endurance at 70°C
±
(3.0%+0.1Ω)
Endurance
±
(3.0%+0.1Ω)
±
(1.0%+0.05Ω)
±
(1.0%+0.05Ω)
Without mechanical damage such as breaks.
Resistance to solvent
Bend strength of
the end face plating
Static electric
characteristics
±
(5.0%+0.05Ω)
Compliance Standard(s) : IEC60115−8
JISC 5201−8
Chip weight (typical value)
Parameter
Weight
Unit
mg/pc
LTR10
5.58
LTR18
10.02
LTR50
24.18
LTR100
38.15
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2012 ROHM Co., Ltd. All rights reserved.
3/4
2012.11 - Rev.D
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
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
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such special purpose, please contact a ROHM sales representative before purchasing.
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http://www.rohm.com/contact/
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