SURFACE MOUNT

LR Series: Metal Alloy, Very Low-Resistance

RESISTORS

INTRODUCTION

RFE International, Inc. LR Series of low resistance

Surface Mount Resistors are ideal for applications

where low resistance, tight tolerance and temperature

stability is important. Current sense, power supply,

Industrial controls, are a few of the applications

suitable for this series of resistor.

RFE International • Tel:(949) 833-1988 • Fax:(949) 833-1788 • E-Mail Sales@rfeinc.com

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APPLICATIONS

• Power Supply

• Battery Pack

• DIY Tools

• Inverter / Converter (AC/DC, DC/DC, DC/AC)

• Test Equipment

• Precision Measuring Equipment

• LED Driver

• Automotive

Resistance

Range mÿ©

L

W

H

T

a

b

i

0.12ÿ±

0.010

0.062ÿ±

0.010

0.029ÿ±

0.010

0.02ÿ±

0.010

(3.15ÿ±

0.254)

(1.60ÿ±

0.254)

(0.750ÿ±

0.254)

(0.50ÿ±

0.254)

0.051ÿ±

0.010

(3.15ÿ±

0.254)

0.031ÿ±

0.010

(0.8ÿ±

0.254)

0.074ÿ±

0.010

(1.88ÿ±

0.254)

0.044ÿ±

0.010

(1.13ÿ±

0.254)

0.039ÿ±

0.010

0.085ÿ±

0.010

(1.0ÿ±

0.254)

(2.15ÿ±

0.254)

0.043ÿ±

0.010

0.085ÿ±

0.010

(1.1ÿ±

0.254)

(2.15ÿ±

0.254)

0.039ÿ±

0.010

0.085ÿ±

0.010

(1.0ÿ±

0.254)

(2.15ÿ±

0.254)

0.071ÿ±

0.010

(1.8ÿ±

0.254)

0.065ÿ±

0.010

(1.65ÿ±

0.254)

0.051ÿ±

0.010

(1.3ÿ±

0.254)

0.264ÿ±

0.010

0.283ÿ±

0.010

0.039ÿ±

0.010

0.045ÿ±

0.010

(6.7ÿ±

0.254)

(7.2ÿ±

0.254)

(1.0ÿ±

0.254)

(1.15ÿ±

0.254)

0.136(3.5)

Model

(5.10ÿ±

0.254)

0.20ÿ±

0.010

0.10ÿ±

0.010

(2.54ÿ±

0.254)

0.031ÿ±

0.010

(0.8ÿ±

0.254)

0.031ÿ±

0.010

(6.25ÿ±

0.254)

LR3WR,

LR3.5WR,

LR4WR

(2728)

4~100

0.108(2.75)

0.308(7.8)

0.052(1.32)

1

1.5

2

2.5

3

0.268ÿ±

0.010

(6.8ÿ±

0.254)

0.264ÿ±

0.010

LR4WSR

(2725)

0.25, 0.5

0.125(3.2)

0.27(6.9)

(6.7ÿ±

0.254)

0.035ÿ±

0.010

(0.9ÿ±

0.254)

0.050(1.27)

4.1~100

0.083(2.11)

0.145(3.68)

0.125(3.18)

(3.30ÿ±

0.254)

(0.8ÿ±

0.254)

LR1WR,

LR1.5WR,

LR2WR,

LR3WSR

(2512)

0.5~4

0.120(3.05)

0.145(3.68)

0.026(0.66)

LR1WSR

(2010)

0.5~3

0.011(1.80)

0.115(2.92)

0.048(1.22)

4~100

0.009(2.29)

0.115(2.92)

0.095(2.41)

LR1WMR

(1206)

1~50

0.063(1.60)

0.086(2.18)

DIMENSIONS

SOLDER PAD DIMENSIONS

0.246ÿ±

0.010

0.13ÿ±

0.010

W

DIMENSIONS

PERFORMANCE

C2BB05

REV.2009.3.3

Test Item

Conditions of test

Test Method

Thermal Shock

-55 °C to +125 °C, 1000 cycles, 15 minutes at each extreme

JIS C5202 7.4

Solderability test

Steam aging: 4hrs, cool down 30 minutes then test

JIS C5202 6.5

Low Temperature

Storage

-55°C for 1000 hours

JIS C5202 7.1

High Temperature

Exposure

1000 hours @ +155 °C

JIS C5202 7.2

Bias Humidity

+85 °C, 85% RH, 10% Bias, 1000 hours, 90 minutes ”ON”, 30

minutes ”OFF”

JIS C5202 7.9

Mechanical Shock

100 grams for 6 milliseconds, 5 pulses

JIS C5202 6.13

Vibration

Frequency varied 55Hz in one minute, 3 directions, 12 hours

JIS C5202 6.7

Load Life

1000 hours @ rated power, +100 °C, 1.5 hours “ON”,

0.5 hours “OFF”

JIS C5202 7.10

Resistance to Solder

Heat

Solder temp./immersion time: 260+5 °C, 10+1secs and 350+10 °C

3.5+0.5secs

JIS C5202 6.4

Moisture Resistance

Mil-STD-202, Method 106, 0% power, 7a and 7b not required

JIS C5202 7.6

Resistance to solvent

Immersion time: 60+5 secs, 20 °C~25 °C

ÿ±

JIS C5202 6.9

Inch (mm)