SURFACE MOUNT

LR Series: Metal Alloy, Very Low-Resistance

RESISTORS

C2BB05

REV.2009.3.3

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PART NUMBER EXAMPLE

LR1WSR - R05 - J

DERATING CURVE

RATINGS & STANDARD RANGES

Operating Temp. Range -65°C ~ +275°C

m OHM TO OHMS

(m = milli)

100m

= 0.1

WW

1

15

100

80

60

40

20

0

-55 -30

0

20

40

60

80

100 120 140

180

Ambient Temperature (°C)

160

200 220 240 260 280

275 ºC

W

0.5% (D)

1% (F)

5% (J)

LR1WMR

(1206)

1

31.62A

126.49A

7~50

1~50

1~50

LR1WSR

(2010)

1

44.72A

178.89A

3~100

0.5~100

0.5~100

1

44.72A

223.61A

1.5

54.77A

273.86A

2

63.25A

252.98A

7~75

0.5~75

0.5~75

3

77.46A

232.38A

7~10

0.5~10

0.5~10

3

27.39A

82.16A

3.5

29.58A

88.74A

LR4WSR

(2725),

LR4WR

(2728)

4

31.62A

126.49A

4~50

4~50

4~50

4~100

Item

Power

Rating at

100ÿ°

C

(Watts)

Max.

Rating

Current

Max.

Overload

Current

LR2WR,

LR3WSR

(2512)

LR3WR,

LR3.5WR

(2728)

4~100

4~100

LR1WR,

LR1.5WR

(2512)

7~100

0.5~100

0.5~100

Resistance Range

m

TEMP. COEFFICIENT

Tape Width

Diameter

Pieces/Reel

1206

8mm/Embossed Plastic

178mm/7”

2,000

2010

12mm/Embossed Plastic

178mm/7”

2,000

2512

12mm/Embossed Plastic

178mm/7”

1,000

2725

12mm/Embossed Plastic

178mm/7”

1,000

2728

12mm/Embossed Plastic

178mm/7”

1,000

Size

Reel

PACKAGING

W

W

W

W

(PPM / C°)

Type

Resistance

Range

Temp. Coeff.

1 ~ 4mÿ©

50

4.1 ~ 15mÿ©

-25

15.1 ~ 50mÿ©

-15

0.5 ~ 3mÿ©

50

3.1 ~ 6.9mÿ©

-25

7 ~ 100mÿ©

-15

0.5 ~ 3mÿ©

50

3.1 ~ 6.9mÿ©

-25

0.5~1.5mÿ©

50

1.6~10mÿ©

-25

0.25~0.9mÿ©

50

1~3mÿ©

-25

4~7mÿ©

-25

7.1~100mÿ©

-15

4~7mÿ©

-25

7.1~50mÿ©

-15

LR4WSR

(2725)

LR3WSR,

LR3.5WR

(2728)

LR4WR

(2728)

LR1WMR

(1206)

LR1WSR

(2010)

LR1WR,

LR1.5WR,

LR2WR

(2512)

LR3WSR

(2512)

W

W

W

W

W

W

W

W

W

W

W

W