ROHM LTR10EVHJS Technical data

Table 1

t

High Power Low Ohmic Chip Resistors<Wide Terminal type>

LTR10 (2012 size : 1 / 2W)

zFeatures

1) Improved welding strength
The structure of longer electrodes provides the wider welding area than the chip resistors with normal electrodes, and this
enhanced the solder welding strength.

2) Increased surge-resistance
This is achieved by Rohm’s original trimming technology plus resistive element patterning.

3) High-power tolerance
Two times of the rated power is guaranteed than the normal-electrode resistors.

4) ROHM resistors are ISO-9001 & ISO/TS16949 certified.
Design and specifications are subject to change without notice. Carefully check the specification sheet before using or
ordering it.

zApplications
Automotive, industrial and power supply.

zRatings

Item Conditions Specifications

Rated power

Power must be derated according to the power derating curve in
Figure 1 when ambient temperature exceeds 70°

100

80

60

40

POWER LOAD (%)

20

0

−55 0 70 100 155
AMBIENT TEMPERATURE (°C)

Fig.1

C.

0.5W (1 /2W)
at 70°C

Rated voltage
Rated current

Nominal resistance
Operating temperature

The voltage rating is calculated by the following equation.

E = P × R
I = P / R

See Table 1.

E : Rated voltage (V)
I : Rated current (A)
P : Rated power (W)
R : Nominal resistance (Ω)

C to + 155°C

−55°

Resistance range

(Ω)

0.047 to 9.1

Resistance

tolerance
F (±1%)
J (±5%)

Special part number

S
L

Resistance temperature coefficien

(ppm/°C)

±150

zBefore using components in circuits where they will be exposed to transients such as pulse loads (short–duration, high– level loads), be certain to evaluate the
component in the mounted state. In addition, the reliability and performance of this component cannot be guaranteed if it is used with a steady state voltage that
is greater than its rated voltage.

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2009.10 - Rev.B

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Data Sheet LTR10

z

Characteristics

Item Test conditions (JIS C 5201-1)

Resistance

Variation of resistance
with temperature

Overload

Solderability

Resistance to
soldering heat

Rapid change of
temperature

Guaranteed value

Resistor type

JIS C 5201-1 4.5
Voltage : A
Measuring method : Measure under termination by 4 probe

F : ±1%
J : ±5%

See Table.1

± (2.0%+0.1Ω)

A new uniform coating of minimum of
95% of the surface being immersed
and no soldering damage.

± (1.0%+0.005Ω)

No remarkable abnormality on the appearance.

± (1.0%+0.005Ω)

JIS C 5201-1 4.8
Measurement : −55 / +25 / +125°C

JIS C 5201-1 4.13
Rated voltage (current) × 2.5, 2s.

JIS C 5201-1 4.17
Rosin·Ethanol (25%WT)
Soldering condition : 235±5
Duration of immersion : 2.0±0.5s.

JIS C 5201-1 4.18
Soldering condition : 260±5
Duration of immersion : 10±1s.

JIS C 5201-1 4.19
Test temp. : −55

Under terminatio

Terminal

°C

°C

°C

to +125°C 5cyc

Damp heat, steady state

Endurance at 70°C

Endurance

Resistance to solvent

Bend strength of
the end face plating

± (3.0%+0.005Ω)

± (3.0%+0.005Ω)

± (3.0%+0.005Ω)

± (0.5%+0.005Ω)

Without open.

JIS C 5201-1 4.24

°C, 93%RH

40
Test time : 1,000h to 1,048h

JIS C 5201-1 4.25.1
Rated voltage (current), 70

1.5h : ON − 0.5h : OFF
Test time : 1,000h to 1,048h

JIS C 5201-1 4.25.3

°C

155
Test time : 1,000h to 1,048h

JIS C 5201-1 4.29

°C

, Immersion cleaning, 5±0.5min

23±5
Solvent : 2-propanol

JIS C 5201-1 4.33

°C

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2009 ROHM Co., Ltd. All rights reserved.

2009.10 - Rev.B