High power low ohmic chip resistors
〈
Wide terminal type
〉
LTR series
●
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 / ISO / TS16949 certification.
5)Corresponds to AEC-Q200.
●
Products list
Size
(mm)
(inch)
0805
Part No.
LTR10
Rated
power
(70
℃
)
(W)
0.5
Resistance
tolerance
(%)
F ( ±1% )
J ( ±5% )
F ( ±1% )
J ( ±5% )
T
emperature
coefficient
(ppm /
℃
)
±150
±150
0
½
300
0
½
300
0
½
200
0
½
150
±100
0
½
300
0
½
300
0
½
200
0
½
150
±100
0
½
+150
0
½
+100
±200
Resistance range
(Ω)
0.047
≦
R<0.100
0.100
≦
R<10
R
＝
0.010
0.010
＜
R
＜
0.020
0.020
≦
R
＜
0.050
0.050
≦
R
＜
0.500
0.500
≦
R
≦
1.000
R
＝
0.010
0.010
＜
R
＜
0.020
0.020
≦
R
＜
0.051
0.051
≦
R
＜
0.100
0.100
≦
R
≦
0.910
0.100
≦
R<0.200
0.200
≦
R<1
0.100
≦
R<1
(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)
(E24 series)
Operating
temperature
range
(
℃
)
-55
½
+155
2012
LTR18
3216
1206
1.0
-55
½
+155
LTR50
2550
1020
2.0
F ( ±1% )
J ( ±5% )
F ( ±1% )
F ( ±1% )
J ( ±5% )
-55
½
+155
LTR100
6432
2512
2.0
-55
½
+155
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.
LTR
(High power
chip resistors
〈
Wide terminal
type
〉
)
1 0
Size (mm [inch])
10(2012 [0805])
18(3216 [1206])
50(2550 [1020])
100(6432 [2512])
EVH
Packaging specifications code
Packaging
Part No. Code specifications Quantity
/ Reel
J
Resistance
tolerance
L
Special
part code
1R0
Nominal resistance
Resistance code, 3 or 4 digits.
Resistance
tolerance Resistance
+
code
Special code
FU, FS
FL, JS
JU, JL
：
：
LTR10
EVH
LTR18
EZP
LTR50
UZP
LTR100
JZP
Paper tape
(4mm Pitch)
Paper tape
(4mm Pitch)
Embossed
tape
(4mm Pitch)
Embossed
tape
(4mm Pitch)
F (±1%)
J (±5%)
5000
5,000
5,000
4,000
U
：
10mΩ
S
：
11mΩ
½
91mΩ
L
：
100mΩ
½
4 digits
3 digits
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© 2018 ROHM Co., Ltd. All rights reserved.
1/4
2018.09 - Rev.I
LTR series -low ohmic-
●
Datasheet
Derating curve
When the ambient temperature exceeds 70°C, power dissipation must be adjusted according to the derating curves below.
■
LTR 10 / 18 / 50 / 100
●
Characteristics
T items
est
Guaranteed value
Resistor type
T conditions
est
20
℃
Measuring method : Measure Bottom termination
by 4 proves.
Resistance
See P.1
Variation of resistance
with temperature
Overload
See P.1
±(2.0
％＋
0.0005Ω)
Anew uniform coating of minimum of 95% of
the surface being immersed and no
soldering damage.
Measurement
：
+25/-55, +25/+125
℃
Rated voltage(current)×2.5
，
2s
Rosin-ethanol solution25% (Wweight)
Soldering condition
：
245±5
℃
Duration of immersion
：
2.0±0.5s
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
±(1.0
％＋
0.0005Ω)
Soldering condition
：
260±5
℃
No remarkable abnormality on the appearance. Duration of immersion
：
10±1s
±(1.0
％＋
0.0005Ω)
±(3.0
％＋
0.0005Ω)
±(3.0
％＋
0.0005Ω)
±(3.0
％＋
0.0005Ω)
±(1.0
％＋
0.0005Ω)
Without mechanical damage such as breaks.
T temp
：
-55
℃½
+125
℃
5cycle
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, 5±0.5min
Solvent: 2-propanol
-
Compliance Standard(s) : IEC60115-8
JISC 5201-8
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© 2018 ROHM Co., Ltd. All rights reserved.
3/4
2018.09 - Rev.I
Notice
Precaution on using ROHM Products
1.
If you intend to use our Products in devices requiring extremely high reliability (such as medical equipment
,
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 (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
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.
(Note 1)
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
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Rev.003
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