Low Value 3W

Chip Resistors

LRF3W Series

www.bitechnologies.com www.irctt.com www.welwyn-tt.com

General Note

TT electronics reserves the right to make changes in product specification without notice or liability.

All information is subject to TT electronics’ own data and is considered accurate at time of going to print.

© TT electronics plc

2.14

e

u

l

a

V

c

i

t

s

i

r

e

t

c

a

r

a

h

C

Power dissipation @70°C

3 Watts

Resistance Range

R003to 1R0

V

0

0

2

d

n

a

t

s

h

ti

w

c

ir

t

c

e

l

e

i

D

Ambient temp range

-55 to +150°C

Resistance tolerance

<R004 5%,

≥R004 1, 2, 5%

C

°

/

m

p

p

0

0

1

±

R

C

T

Pad & trace area for maximum

power rating*

Low Value 3W

Chip Resistors

LRF3W Series

•

•

Tolerances to ±1%

AEC-Q200 Qualified

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability.

All information is subject to Welwyn’s own data and is considered accurate at time of going to print.

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

Electrical Data

Power Derating Curve

04.10

A subsidiary of

TT electronics plc

Welwyn Components

84

0.51

± 0.13mm

6.35

± 0.13mm

3.18

± 0.13mm

0.94 mm max

thickness

Plating

wrap-around

0.81

± 0.13mm

2.29

± 0.13mm

7.6mm

2mm

1mm

Physical Data

100

80

60

40

20

0

25

°

70

°

150

°

Temperature in

°C

Top

Bottom

(Board Side)

Recommended

Solder Pad Layout

Weight 0.065g typ.

e

u

l

a

V

c

i

t

s

i

r

e

t

c

a

r

a

h

C

Power dissipation @70°C

3 Watts

Resistance Range

R003to 1R0

V

0

0

2

d

n

a

t

s

h

ti

w

c

ir

t

c

e

l

e

i

D

Ambient temp range

-55 to +150°C

Resistance tolerance

<R004 5%,

≥R004 1, 2, 5%

C

°

/

m

p

p

0

0

1

±

R

C

T

Pad & trace area for maximum

power rating*

Low Value 3W

Chip Resistors

LRF3W Series

•

•

Tolerances to ±1%

AEC-Q200 Qualified

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability.

All information is subject to Welwyn’s own data and is considered accurate at time of going to print.

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

Electrical Data

Power Derating Curve

04.10

A subsidiary of

TT electronics plc

Welwyn Components

84

0.51

± 0.13mm

6.35

± 0.13mm

3.18

± 0.13mm

0.94 mm max

thickness

Plating

wrap-around

0.81

± 0.13mm

2.29

± 0.13mm

7.6mm

2mm

1mm

Physical Data

100

80

60

40

20

0

25

°

70

°

150

°

Temperature in

°C

Top

Bottom

(Board Side)

Recommended

Solder Pad Layout

Weight 0.065g typ.

e

u

l

a

V

c

i

t

s

i

r

e

t

c

a

r

a

h

C

Power dissipation @70°C

3 Watts

Resistance Range

R003to 1R0

V

0

0

2

d

n

a

t

s

h

ti

w

c

ir

t

c

e

l

e

i

D

Ambient temp range

-55 to +150°C

Resistance tolerance

<R004 5%,

≥R004 1, 2, 5%

C

°

/

m

p

p

0

0

1

±

R

C

T

Pad & trace area for maximum

power rating*

Low Value 3W

Chip Resistors

LRF3W Series

•

•

Tolerances to ±1%

AEC-Q200 Qualified

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability.

All information is subject to Welwyn’s own data and is considered accurate at time of going to print.

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

Electrical Data

Power Derating Curve

04.10

A subsidiary of

TT electronics plc

Welwyn Components

84

0.51

± 0.13mm

6.35

± 0.13mm

3.18

± 0.13mm

0.94 mm max

thickness

Plating

wrap-around

0.81

± 0.13mm

2.29

± 0.13mm

7.6mm

2mm

1mm

Physical Data

100

80

60

40

20

0

25

°

70

°

150

°

Temperature in

°C

Top

Bottom

(Board Side)

Recommended

Solder Pad Layout

Weight 0.065g typ.

LRF3W

Power rating @70°C

watts

3

ohms

R003 to R10

Resistance tolerance

%

<R004: 5, ≥R004: 1, 2, 5

TCR

ppm/°C

<R004: ±550, ≥R004: ±100

Dielectric withstand

volts

200

Ambient temperature range

°C

-55 to +150

Values

500

Recommended Solder Pad Dimensions

with example Kelvin PCB traces

7.6 mm

1 mm

2 mm

Sense Tracks: V+

V-

Current Track: I

Current Track: I

Recommended Solder Pad Dimensions

with example Kelvin PCB traces

Top

Bottom

(Board Side)

Note 1: Contact factory for values outside this range. Note 2: Many values = N x R001 and N x R005 up to N=10 are also available.

Note 3: Recommended minimum pad & adjacent trace area for each termination for rated dissipation on FR4 PCB