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Contact us: (603) 635-2800

Designed for mounting horizontally or vertically on a circuit board,

291 Series heat sinks employ a unique clip for

attachment of TO-220 case styles. One type is available with a locking clip and one with a 0.140 in. (3.6) diameter

mounting hole only.

BOARD LEVEL

HEAT SINKS

BOARD LEVEL

HEAT SINKS

289 & 290 SERIES

LOW-COST SINGLE OR DUAL PACKAGE

HEAT SINKS

Height Above

Horizontal Mounting

Standard

PC Board

Maximum Footing

Natural

Forced

Weight

P/N

in. (mm)

in. (mm)

Convection

Convection

lbs. (grams)

289-AB

0.500 (12.7)

1.000 (25.4) x 0.710 (18.1)

50°C @ 2W

9.0 C/W @ 400 LFM

0.0055 (2.49)

289-AP

0.500 (12.7)

1.000 (25.4) x 0.710 (18.1)

50°C @ 2W

9.0 C/W @ 400 LFM

0.0055 (2.49)

290-1AB

0.500 (12.7)

1.000 (25.4) x 1.180 (30.0)

44°C @ 2W

7.0 C/W @ 400 LFM

0.0082 (3.72)

290-2AB

0.500 (12.7)

1.000 (25.4) x 1.180 (30.0)

44°C @ 2W

7.0 C/W @ 400 LFM

0.0081 (3.67)

Material: Aluminum, Black Anodized

Low in cost and compact in overall dimensions, one

289 Series heat sink can accommodate one semiconductor;

the

289 Series is available with a black anodized finish (289-AB) or with no finish (289-AP). Two semiconductors

can be mounted to the 290-2AB style.

MECHANICAL DIMENSIONS

NATURAL AND FORCED

CONVECTION CHARACTERISTICS

289 SERIES

290 SERIES

Dimensions: in. (mm)

Height Above

Footprint

Standard

PC Board

Dimensions

Mounting

Solderable Mounting

Natural

Forced

P/N

in. (mm)

in. (mm) Configuration Tab Options Style Convection Convection

250-122AB

1.220 (31.0)

1.000 (25.4) x .500 (12.7)

Vert./Horiz.

No Tab

Clip

50°C @ 4W

3.7°C/W @ 400 LFM

250-122ABE-09

1.220 (31.0)

1.000 (25.4) x .500 (12.7)

Vertical

09

Clip

50°C @ 4W

3.7°C/W @ 400 LFM

250-122ABE-25

1.380 (35.1)

1.000 (25.4) x .500 (12.7)

Vertical

25

Clip

50°C @ 4W

3.7°C/W @ 400 LFM

Material: Aluminum, Black Anodized

MECHANICAL DIMENSIONS

NATURAL AND FORCED

CONVECTION CHARACTERISTICS

250-122AB

250-122AB-09

250-122AB-25

250 SERIES

250 SERIES

HIGH-PERFORMANCE SLIM PROFILE HEAT SINKS

WITH INTEGRAL CLIPS

Thermal Performance at Typical Load

Thermal Performance at Typical Load

Height Above

Footprint

Standard

PC Board

Dimensions

Mounting

Solderable Mounting

Natural

Forced

P/N

in. (mm) in. (mm)

Configuration Tab Options Style Convection Convection

237-167AB2

1.675 (42.5)

1.000 (25-4) x 1.000 (25.4)

Vertical

2, Twisted

Clip/Mtg

Slot46°C @ 4W 4.5°C/W @ 200 LFM

237-167AB3

1.675 (42.5)

1.000 (25.4) x 1.000 (25.4)

Vertical

3, Twisted

Clip/Mtg

Slot46°C @ 4W 4.5°C/W @ 200 LFM

237-167ABE2-24 1.675 (42.5)

1.000 (25.4) x 1.000 (25.4)

Vertical

2, Solderable Clip/Mtg

Slot46°C @ 4W 4.5°C/W @ 200 LFM

252-167AB2

1.675 (42.5)

1.000 (25.4) x 1.000 (25.4)

Vertical

2, Twisted

Clip/Mtg

Slot40°C @ 4W 4.5°C/W @ 200 LFM

252-167AB3

1.675 (42.5)

1.000 (25.4) x 1.000 (25.4)

Vertical

3, Twisted

Clip/Mtg

Slot40°C @ 4W 4.5°C/W @ 200 LFM

252-167ABE2-24 1.675 (42.5)

1.000 (25.4) x 1.000 (25.4)

Vertical

2, Solderable Clip/Mtg

Slot40°C @ 4W 4.5°C/W @ 200 LFM

Order SpeedClips™ 285SC or 330SC separately for rapid component installation, lowering manufacturing costs.

Material: Aluminum, Black Anodized

NATURAL AND FORCED

CONVECTION CHARACTERISTICS

227-167

237-167AB3

252-167AB3

237-167AB3

252-167

237-167AB2

252-167AB2

237-167AB2-24

252-167AB2-24

237 AND 252 SERIES

237 AND 252 SERIES

252-167AB3

HIGH-PERFORMANCE, HIGH-POWER VERTICAL

MOUNT HEAT SINKS

237 & 252 SERIES

Thermal Performance at Typical Load

Vertical

Height Above

Mounting Footprint

Standard

PC Board

Dimensions

Mounting

Natural

Forced

Weight

P/N

in. (mm)

in. (mm)

Style

Convection

Convection

lbs. (grams)

291-C236AB

0.860 (21.9)

1.100 (27.0) x 0.360 (9.1)

TO-220 (Clip)

80°C @ 2W

24°C/W @ 600 LFM

0.0026 (1.18)

291-H36AB

0.860 (21.9)

1.100 (27.0) x 0.360 (9.1) TO-220 (Mtg. Hole)

68°C @ 2W

16°C/W @ 600 LFM

0.0026 (1.18))

Material: Aluminum, Black Anodized

NATURAL AND FORCED

CONVECTION CHARACTERISTICS

291 SERIES

291-C2

291-H

291 SERIES

Dimensions: in. (mm)

Dimensions: in. (mm)

MECHANICAL DIMENSIONS

LABOR-SAVING CLIP-ON HEAT SINKS

Thermal Performance at Typical Load

TO-218; TO-202; TO-220

BOARD LEVEL POWER SEMICONDUCTOR HEAT SINKS

Dimensions: in. (mm)

MECHANICAL DIMENSIONS

TO-220

TO-220

Multiwatt