High power chip resistors<wide terminal type / anti-surge>
LTR series
●
Datasheet
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 / IATF16949 certification.
5)Corresponds to AEC-Q200.
●
Products list
Size
(mm)
Rated
power
(70
℃
)
(inch)
(W)
Limiting
element
voltage
(V)
T
emperature
coefficient
Resistance
tolerance
Resistance range
Operating
temperature
range
(
℃
)
-55
½
+155
Automotive
grade
available
Part No.
(ppm /
℃
)
(%)
(Ω)
±100
D ( ±0.5% )
10
≦
R
≦
1M (E24/96 series)
LTR10
1220 0508 0.25
150
±100
F ( ±1% )
1
≦
R
≦
1M (E24 series)
±200
J ( ±5% )
1
≦
R
≦
1M (E24 series)
±100
D ( ±0.5% )
10
≦
R
≦
1M (E24/96 series)
LTR18
1632 0612 0.75
200
±100
F ( ±1% )
1
≦
R
≦
1M (E24 series)
±200
J ( ±5% )
1
≦
R
≦
1M (E24 series)
±100
D ( ±0.5% )
10
≦
R
≦
130k (E24 series)
LTR50
2550 1020 1.0
200
±100
F ( ±1% )
1
≦
R
≦
1M (E24 series)
±200
J ( ±5% )
1
≦
R
≦
1M (E24 series)
±100
D ( ±0.5% )
10
≦
R
≦
1M (E24 series)
LTR100
3264 1225 2.0
200
±100
F ( ±1% )
1
≦
R
≦
1M (E24 series)
J ( ±5% )
(E24 series)
±200
1
≦
R<1M
*E24 : Standard products, E96 : Custom products.(Class J is E24 series only)
Design and specifications are subject to change without notice.
Carefully check the specification sheet supplied with the product before using or ordering it.
●
Yes
-55
½
+155
Yes
-55
½
+155
Yes
-55
½
+155
Yes
Part Number Description
L T R
Part No.
LTR
(High power
chip resistors
wide terminal
type / anti-
surge)
1 8
Size
(mm [inch])
10(1220 [0508])
18(1632 [0612])
50(2550 [1020])
100(3264 [1225])
EZ P
Packaging specifications code
Packaging
Part No. Code specifications
Paper tape
LTR10
EZP (4mm Pitch)
Paper tape
LTR18
EZP (4mm Pitch)
Embossed tape
LTR50
UZP (4mm Pitch)
Embossed tape
LTR100
JZP (4mm Pitch)
Quantity
/ Reel
5,000
5,000
5,000
4,000
J
Resistance
tolerance
D (±0.5%)
F (±1%)
J (±5%)
1 0 5
Nominal resistance
Resistance code, 3 or 4 digits.
Resistance
tolerance
D,F
J
：
：
Resistance
code
4 digits
3 digits
EX.)
1Ω = 1R00 (±1%)
1R0 (±5%)
9.1Ω = 9R10 (±1%)
9R0 (±5%)
10Ω = 10R0 (±0.5%,± 1%)
100 (±5%)
1MΩ = 1004 (±0.5%,± 1%)
105 (±5%)
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© 2020 ROHM Co., Ltd. All rights reserved.
1/4
2020.07 - Rev.J
LTR series
●
Datasheet
<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.
Chip resistor dimensions and markings
(Unit:mm)
Part No.
LTR10
LTR18
LTR50
LTR100
(mm)
1220
1632
2550
3264
(inch)
0508
0612
1020
1225
L
1.20±0.10
W
2.0±0.10
t
0.55±0.10
a
0.25±0.10
b
0.35±0.20
Marking
existence
Yes
1.6±0.15
3.2±0.15
0.55±0.10
0.30±0.20
0.50±0.20
Yes
2.5±0.15
5.0±0.15
0.55±0.10
0.38±0.20
0.90±0.20
Yes
3.2±0.15
6.4±0.15
0.55±0.15
0.40±0.25
1.13±0.25
No
●
Land pattern example
(Unit:mm)
Dimensions
Part No.
A
0.50
0.60
0.70
0.83
B
2.70
2.90
3.35
3.69
C
2.00
3.20
5.00
6.40
D
1.10
1.15
1.30
1.43
LTR10
LTR18
LTR50
LTR100
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© 2020 ROHM Co., Ltd. All rights reserved.
2/4
2020.07 - Rev.J
LTR series
●
Datasheet
Derating curve
When the ambient temperature exceeds 70°C, power dissipation must be adjusted according to the derating curve below.
■
LTR 10 / 18 / 50 / 100
●
Characteristics
T items
est
Guaranteed value
See P.1
See P.1
±(2.0
％＋
0.1Ω)
Anew 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.
20
℃
Measurement
：
+25/-55, +25/+125
℃
T voltage is the smaller one of
①
or
②
est
①
Rated voltage(current)×2.5
，
2s
②
Maximum overload voltage
※
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
T temp
：
-55
℃½
+125
℃
5cycles
est
40
℃，
93
％
(Relative humidity)
T time
：
1,000h
est
Rated voltage(current),70
℃
1.5h:ON
－
0.5h:OFF
T time
：
1,000h
est
155
℃
T time
：
1,000h
est
23±5
℃
Immersion cleaning,
Solvent: 2-propanol
-
EIAJ ED-4701/300 T method 304
est
Voltage
：
3kV
C
：
100pF
R
：
1.5kΩ
Apply cycle
：
Once
Compliance Standard(s) : IEC60115-8
JIS C 5201-1
T conditions
est
Resistance
Variation of resistance
with temperature
Overload
Solderability
Resistance to
soldering heat
Rapid change of
temperature
Damp heat, steady state
Endurance at 70
℃
Endurance
Resistance to solvent
Bend strength of
the end face plating
Static
electric
characteristics
±(5.0
％＋
0.05Ω)
※
Maximum overload voltage (T voltage)
est
LTR10
300V
LTR18
400V
LTR50
400V
LTR100
400V
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© 2020 ROHM Co., Ltd. All rights reserved.
3/4
2020.07 - Rev.J
LTR series
●
Datasheet
(Unit : mm)
B0
2.3±0.1
3.5
+0.15
-0.05
T2
Tape dimensions
■
Paper tape
Part No.
LTR10
LTR18
Part No.
LTR10
LTR18
W
8.0±0.3
8.0±0.3
D0
Φ1.5 +0.1
0
+0.1
Φ1.5
0
F
3.5±0.05
3.5±0.05
P0
4.0±0.1
4.0±0.1
E
1.75±0.1
1.75±0.1
P1
4.0±0.1
4.0±0.1
A0
1.45±0.1
1.95
+0.1
-0.05
P2
2.0±0.05 MAX1.1
2.0±0.05 MAX1.1
■
Embossed tape
Part No.
LTR50
LTR100
Part No.
LTR50
LTR100
W
12.0±0.3
12.0±0.3
D0
Φ1.5 +0.1
0
Φ1.5 +0.1
0
F
5.5±0.05
5.5±0.05
P0
4.0±0.1
4.0±0.1
E
1.75±0.1
1.75±0.1
P1
4.0±0.1
4.0±0.1
A0
3.4±0.2
3.5±0.2
P2
(Unit : mm)
B0
5.6±0.2
6.7±0.2
K
2.0±0.05 MAX1.1
2.0±0.05 MAX1.1
●
Reel dimensions
Using two kinds of reels for taping.
Part No.
LTR10
LTR18
LTR50
LTR100
A
Φ180 0
-1.5
B
Φ60 +1
0
C
9 +1.0
0
13 +1.0
0
(Unit : mm)
D
Φ13±0.2
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© 2020 ROHM Co., Ltd. All rights reserved.
4/4
2020.07 - Rev.J
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
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 Cl
2
,
H
2
S, NH
3
, SO
2
, and NO
2
[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 (Exclude cases where no-clean type fluxes is used.
However, recommend sufficiently about the residue.); 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
The Products are not subject to radiation-proof design.
Please verify and confirm characteristics of the final or mounted products in using the Products.
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.
De-rate Power Dissipation depending on ambient temperature. When used in sealed area, confirm that it is the use in
the range that does not exceed the maximum junction temperature.
Confirm that operation temperature is within the specified range described in the product specification.
ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in
this document.
3.
4.
5.
6.
7.
8.
9.
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.
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.
2.
For details, please refer to ROHM Mounting specification
Notice-PAA-E
© 2015 ROHM Co., Ltd. All rights reserved.
Rev.004
