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BRUSH WELLMAN
629879-01 BeO
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Keep two or three TO-220 / power tab devices at the same temperature, and cool. 1.4" x 1" x 0.064" With Three(3) 0.148" / 3.7mm holes for above devices, also has an unusual SMOOTH Surface. DANGER- Beryllium oxide (BeO) is unique for oxides as it combines excellent electrical insulating properties with high thermal conductivity. It is also corrosion resistant. The high toxicity of the beryllium oxide powders when inhaled, and the high cost of the raw material, has limited its use to applications that exploit its singular properties. 0.2PPM in Air can be Fatal. Not sold to individuals. 10/$50.00 Also known as Beryllia - Beryllium oxide is one of the most expensive raw materials used in ceramics. The expense is linked in part to the precautions to avoid the toxic effects of the powder when handling during fabrication. Inhalation of fine particles of beryllium oxide results in respiratory disease, with the severity related to the length of exposure. Thermal conductivity is extremely high in comparison with other ceramics, particularly below 300ºC. For comparison the thermal conductivity of beryllium oxide at room temperature is 300 W.m–1K-1, copper is 300 W.m–1K-1 and alumina is 35 W.m–1K-1. Electrical resistivity is high. BeO is classed as an electrical insulator. BeO is most often used as an electronic substrate, exploiting its high thermal conductivity and good electrical resistivity to give an effective heat sink. The material is found particularly in high power devices or high density electronic circuits for high speed computers.
Since BeO is transparent to microwaves, the material may be used as windows, radomes and antennas in microwave communication systems and microwave ovens. Similarly, since the material is transparent to x-rays, it can be used as an x-ray window, particularly for severe operating conditions. It can also be used in high-power laser tubes. Dangerous, Highly Toxic NFPA 704. CAS number 1304-56-9.
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NOS
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$5.89
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UNMARKED
202-297
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Heatsink. For TO-220 components. Material: black anodized aluminum. Dimensions: 1.18" x 1"wide x 0.5" high, ten radiating fins. Predrilled with one 0.15" / 3.8mm hole, bottom is flat, no tabs or nubs.
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NEW
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$0.29
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THERMALLOY/AAVID
507222b00000
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Set of 10 Heatsinks. For use with Two TO-220 packages. Black anodized Aluminum. 1.47 x 1.75" x 0.38" tall. Two mounting holes 0.14" dia, 0.4 " apart. Thermal Resistance: 9.6 C / W RoHS compliant. 37.4mmL x 44.5mmW x 9.7mm. Power Dissipation 8W @ 70°C. 12 radiating fins. Sold in sets of Ten for $2.50
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NS
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$2.50
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THERMALLOY/AAVID
2225B
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Heatsink. For TO-39 or TO-5 components. Material: black anodized aluminum. Dimensions: 0.75" D x 0.4" high, 2 fins. Note: Press-on coolers.
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FN
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$1.99
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THERMALLOY/AAVID
THM6019
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Heatsink. For TO-66 components. Material: black anodized aluminum. Dimensions: 1.5" long x 1" x 1", predrilled with four holes, 12 fins. 0.3oz each.
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NS
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$0.50
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THERMALLOY/AAVID
THM6054B-SE1
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Heatsink. For TO-3 components. Material: black, light weight. Dimensions: 45.8mm (1.806") square x 32.2mm (1.271") tall, 20 fins, 5 each side. ID 1.67" plus (2) 6/32 threaded rivets in base.
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NS
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$1.99
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THERMALLOY/AAVID
6100B
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Heatsink. For TO-220 components. Material: black anodized aluminum. Dimensions: 2" tall x 0.5" thick x 1.4" wide. Vertical mount with two 2.5mm pins, 1" apart. Cross: Aavid 531202B02500.
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FN
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$4.95
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THERMALLOY/AAVID
531202B02500
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HEATSINK for TO-220 or TO-202 Vertical Mtg 2.0"x1.375"x0.50" - new - BLACK
9.00degC/W Solderable Pin
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FN
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$4.95
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THERMALLOY/AAVID
5-600
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NEW HEATSINKS BLK ANODIZED (5.3" X 0.75" X 0.77") SQUARE BAR
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FN
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$1.98
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THERMALLOY/AAVID
2049469-05F
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Heatsink. Material: gold anodized aluminum. Dimensions: 2-7/16" high x 1.5" square, 11 fins.
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NOS
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$2.75
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UNMARKED
PT-460
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HEATSINKS Bright Aluminum TO-220 Two tabs for PC mounting 0.5" apart
0.75 X 0.33 X 0.93" High
CALL FOR SALE PRICE 100/$10.00
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NS
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$0.25
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THERMALLOY/AAVID
THM13103
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HEATSINK 3-round radiators stacked Polished Aluminum surface 0.7"square ready to Cement-On-to-device Black 1-1/8" Dia X 5/8"High 74-43094-01 REV-A01
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NS
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$1.49
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WAKEFIELD ENG
680-.5K
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HEATSINKS Heavy 1-3/4" SQ X 7/16"H Virgin surface is 0.18" thick
four mounting holes 2-1/8" Dia.
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NS
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$0.99
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UNMARKED
8-990
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2-1/2in L X 1-5/8in W X 1in H 2 MOUNTING PINS FOR PC BOARD OR CONNECTING MULTIPLE HEATSINKS TOGETHER
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NS
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$2.48
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UNMARKED
8-213
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Aluminum Heatsinks 10-Fins
Overall 4-11/16" long x 3" wide x 1-1/4"tall, RFE/Used
(this was drilled to hold (2) TO-3 devices) Each fin is 9/16" high.
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RFE
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$3.95
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UNMARKED
PT-584
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TO-220 Mountable black heatsink
Overall 1.635" wide + 1"deep + 0.710" off board.
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FN
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$0.50
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VETTE
1002-723 Rev D
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16" X 12.25" X 1" Aluminum housing holding four Copper with Nickel plate Liquid Heat Transfer blocks. Approximately 67" length of tubing 0.38"OD. Two threaded In & Out connectors 0.44" ID. - RMS surface finish 64 max. -
Weighs a hefty 14-pounds Before shipping.
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NS
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$178.79
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IERC
UPI-TO3B
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New Heatsinks TO-3 Black 1-13/16" Square x 1/2"H
5-Staggared fins each side.
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NS
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$1.00
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UNMARKED
8-328-1
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New Heatsinks 1" wide x 1/4" deep x 1 1/2" high with mt tabs.
Pcb mount for TO-220, TO-202 transistors/scr's etc.
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NS
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$0.50
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THERMALLOY/AAVID
534202B03453
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NEW TO-220 OR TO-218/TO-247 HEATSINKS
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NS
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$3.00
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1 2 3 4
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