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    Manufacturer Series Packaging Product Status Type Package Cooled Attachment Method Shape Length Width Diameter Fin Height Power Dissipation @ Temperature Rise Thermal Resistance @ Forced Air Flow Thermal Resistance @ Natural Material Material 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    Photo Mfr. Part # Availability Price Quantity Datasheet Series Packaging Product Status Type Package Cooled Attachment Method Shape Length Width Diameter Fin Height Power Dissipation @ Temperature Rise Thermal Resistance @ Forced Air Flow Thermal Resistance @ Natural Material Material Finish
    SK 20 37,5 ME

    SK 20 37,5 ME

    Extruded Heatsink

    Fischer Elektronik

    1,000
    RFQ
    SK 20 37,5 ME

    Datasheet

    SK 20 Bulk Active Board Level, Extrusion - - Rectangular 1.476" (37.50mm) 3.937" (100.00mm) - 1.102" (28.00mm) 41.45W @ 80°C 0.54°C/W 1.93°C/W Aluminum Natural Anodized
    SK 459 25 STS TO 248

    SK 459 25 STS TO 248

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 459 25 STS TO 248

    Datasheet

    SK 459 Bulk Active Board Level, Extrusion TO-248 Screw Rectangular 0.984" (25.00mm) 1.969" (50.00mm) - 0.787" (20.00mm) 10.13W @ 80°C 2.45°C/W 7.9°C/W Aluminum Black Anodized
    SK 181 75 ME

    SK 181 75 ME

    Extruded Heatsink

    Fischer Elektronik

    1,000
    RFQ
    SK 181 75 ME

    Datasheet

    SK 181 Bulk Active Board Level, Extrusion - - Rectangular 2.953" (75.00mm) 1.969" (50.00mm) - 0.787" (20.00mm) 20.78W @ 80°C 1.08°C/W 3.85°C/W Aluminum Natural Anodized
    SK 145 50 STC TO 218

    SK 145 50 STC TO 218

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 145 50 STC TO 218

    Datasheet

    SK 145 Bulk Active Board Level, Extrusion TO-218 Clip Rectangular 1.969" (50.00mm) 1.142" (29.00mm) - 0.472" (12.00mm) 8W @ 80°C 3.1°C/W 10°C/W Aluminum Black Anodized
    SK 145 50 STC TO 247

    SK 145 50 STC TO 247

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 145 50 STC TO 247

    Datasheet

    SK 145 Bulk Active Board Level, Extrusion TO-247 Clip Rectangular 1.969" (50.00mm) 1.142" (29.00mm) - 0.472" (12.00mm) 8W @ 80°C 3.1°C/W 10°C/W Aluminum Black Anodized
    SK 81 75 AL

    SK 81 75 AL

    Extruded Heatsink

    Fischer Elektronik

    1,000
    RFQ
    SK 81 75 AL

    Datasheet

    SK 81 Bulk Active Board Level, Extrusion - - Rectangular 2.953" (75.00mm) 3.937" (100.00mm) - 0.591" (15.00mm) 28.57W @ 80°C 0.78°C/W 2.8°C/W Aluminum -
    SK 459 25 STS TO 218

    SK 459 25 STS TO 218

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 459 25 STS TO 218

    Datasheet

    SK 459 Bulk Active Board Level, Extrusion TO-218 Screw Rectangular 0.984" (25.00mm) 1.969" (50.00mm) - 0.787" (20.00mm) 10.13W @ 80°C 2.45°C/W 7.9°C/W Aluminum Black Anodized
    SK 679 50 AL

    SK 679 50 AL

    Extruded Heatsink

    Fischer Elektronik

    1,000
    RFQ
    SK 679 50 AL

    Datasheet

    SK 679 Bulk Active Board Level, Extrusion - - Rectangular 1.969" (50.00mm) 1.646" (41.80mm) - 1.614" (41.00mm) 26.49W @ 80°C 0.84°C/W 3.02°C/W Aluminum -
    SK 181 75 SA

    SK 181 75 SA

    Extruded Heatsink

    Fischer Elektronik

    1,000
    RFQ
    SK 181 75 SA

    Datasheet

    SK 181 Bulk Active Board Level, Extrusion - - Rectangular 2.953" (75.00mm) 1.969" (50.00mm) - 0.787" (20.00mm) 22.86W @ 80°C 1.08°C/W 3.5°C/W Aluminum Black Anodized
    SK 97 50 SA

    SK 97 50 SA

    Extruded Heatsink

    Fischer Elektronik

    1,000
    RFQ
    SK 97 50 SA

    Datasheet

    SK 97 - Active Board Level, Extrusion - - Rectangular 1.969" (50.00mm) 2.835" (72.00mm) - 0.925" (23.50mm) 35.56W @ 80°C 0.7°C/W 2.25°C/W Aluminum Black Anodized
    SK 452 40 2 x M3 TO 3 P

    SK 452 40 2 x M3 TO 3 P

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 452 40 2 x M3 TO 3 P

    Datasheet

    SK 452 Bulk Active Board Level, Extrusion TO-3-P - Rectangular 1.575" (40.00mm) 1.142" (29.00mm) - 0.984" (25.00mm) 10.67W @ 80°C 2.33°C/W 7.5°C/W Aluminum Black Anodized
    SK 452 40 2 x M3 TO 220

    SK 452 40 2 x M3 TO 220

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 452 40 2 x M3 TO 220

    Datasheet

    SK 452 Bulk Active Board Level, Extrusion TO-220 - Rectangular 1.575" (40.00mm) 1.142" (29.00mm) - 0.984" (25.00mm) 10.67W @ 80°C 2.33°C/W 7.5°C/W Aluminum Black Anodized
    SK 63 37,5 AL CB TO 66

    SK 63 37,5 AL CB TO 66

    Extruded Heatsink

    Fischer Elektronik

    1,000
    RFQ
    SK 63 37,5 AL CB TO 66

    Datasheet

    SK 63 Bulk Active Board Level, Extrusion TO-66 - Rectangular 1.476" (37.50mm) 2.559" 65.00mm) - 1.063" (27.00mm) 28.57W @ 80°C 0.78°C/W 2.8°C/W Aluminum -
    SK 452 40 4 x M3 TO 218

    SK 452 40 4 x M3 TO 218

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 452 40 4 x M3 TO 218

    Datasheet

    SK 452 Bulk Active Board Level, Extrusion TO-218 Screw Rectangular 1.575" (40.00mm) 1.142" (29.00mm) - 0.984" (25.00mm) 10.67W @ 80°C 2.33°C/W 7.5°C/W Aluminum Black Anodized
    SK 448 60 3 x M3 L TO 218

    SK 448 60 3 x M3 L TO 218

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 448 60 3 x M3 L TO 218

    Datasheet

    SK 448 Bulk Active Board Level, Extrusion TO-218 - Rectangular 2.362" (60.00mm) 1.100" (27.95mm) - 0.492" (12.50mm) 11.27W @ 80°C 2.2°C/W 7.1°C/W Aluminum Black Anodized
    SK 104 63,5 STSB TO 3 P

    SK 104 63,5 STSB TO 3 P

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 104 63,5 STSB TO 3 P

    Datasheet

    SK 104 - Active Board Level, Extrusion TO-3-P Screw Rectangular 2.500" (63.50mm) 1.374" (34.90mm) - 0.500" (12.70mm) 10W @ 80°C 2.48°C/W 8°C/W Aluminum Black Anodized
    SK 448 60 3 x M3 L TO 248

    SK 448 60 3 x M3 L TO 248

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 448 60 3 x M3 L TO 248

    Datasheet

    SK 448 Bulk Active Board Level, Extrusion TO-248 - Rectangular 2.362" (60.00mm) 1.100" (27.95mm) - 0.492" (12.50mm) 11.27W @ 80°C 2.2°C/W 7.1°C/W Aluminum Black Anodized
    SK 104 63,5 STSB TO 220

    SK 104 63,5 STSB TO 220

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 104 63,5 STSB TO 220

    Datasheet

    SK 104 - Active Board Level, Extrusion TO-220 Screw Rectangular 2.500" (63.50mm) 1.374" (34.90mm) - 0.500" (12.70mm) 10W @ 80°C 2.48°C/W 8°C/W Aluminum Black Anodized
    SK 63 37,5 AL CB SOT 9

    SK 63 37,5 AL CB SOT 9

    Extruded Heatsink

    Fischer Elektronik

    1,000
    RFQ
    SK 63 37,5 AL CB SOT 9

    Datasheet

    SK 63 Bulk Active Board Level, Extrusion SOT-9 - Rectangular 1.476" (37.50mm) 2.559" 65.00mm) - 1.063" (27.00mm) 28.57W @ 80°C 0.78°C/W 2.8°C/W Aluminum -
    SK 104 63,5 STSB SOT 32

    SK 104 63,5 STSB SOT 32

    Extruded Heatsink for PCB mounti

    Fischer Elektronik

    1,000
    RFQ
    SK 104 63,5 STSB SOT 32

    Datasheet

    SK 104 - Active Board Level, Extrusion SOT-32 Screw Rectangular 2.500" (63.50mm) 1.374" (34.90mm) - 0.500" (12.70mm) 10W @ 80°C 2.48°C/W 8°C/W Aluminum Black Anodized
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