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176

F and R Series Heatsinks

For TO-218, TO-220 and TO-247 devices

Height

Surface

Thermal

Heatsink

(in. ±.010 /

Area

Res.*

Part Number

mm ±.25

)

For Package Type

Ohmite Resistor Series

Weight (g) (°C/W)

RA-T2X-25E 1.0/25.4 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100

8,901

25

4.8

RA-T2X-38E 1.5/38.1 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100

12,983

38

3.9

RA-T2X-51E 2.0/50.8 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100

17,065

51

3.5

RA-T2X-64E 2.5/63.5 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100

21,148

63

3.1

FA-T220-25E 1.0 / 25.4 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100

9,285

18

4.7

FA-T220-38E 1.5 / 38.1 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100

13,756

27

3.8

FA-T220-51E 2.0 / 50.8 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100

18,222

37

3.4

FA-T220-64E 2.5 / 63.5 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100

22,814

46

3

*Natural convection

Heat Dissipation

Finish Black anodized

Material 6063-T5 aluminum

Solder 100% Tin (Sn)

PC board attachement 0.091” dia. pre-tinned pins.

300

100 200

600

400 500

900

700 800

50

Heat Dissipated (watts)

30

10

0

4

2

0

10

8

6

16

18

14

12

40

20

20

100

0

1000

Air Velocity (ft./min.)

H = 1"

H = 1.5"

H = 2"

H = 2.5"

60

90

70

80

2.5

1.5

0.5

0

2

1

5

3

4.5

3.5

4

300

100 200

600

400 500

900

700 800

50

Heat Dissipated (watts)

30

10

0

4

2

0

10

8

6

16

18

14

12

40

20

20

100

0

1000

Air Velocity (ft./min.)

H = 1"

H = 1.5"

H = 2"

H = 2.5"

60

90

70

80

2.5

1.5

0.5

0

2

1

5

3

4.5

3.5

4

F Series

R Series

Fea tu R e S

•Forverticalmountingwithsolderablepins

•ForTO-220,TO-218,TO-247

c H a R acte R i S tic S

S e R ie S SP eci F icati ONS

(continued)