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A general-purpose yet efficient heat dissipator for TO-3 and virtually all other styles of metal case power semiconductor package types, the 621 and 623 Series low-profile flat back heat sinks find a wide variety of applications. The central channel between fins measures 1.300 in. (33.0) (min.) in width, accommodating many types of packages. Mounting hole pattern A is predrilled for the standard TO-3 package. Material: Aluminum Alloy, Black Anodized.

Application	Metal-Case Power Semiconductors
Brand/Series	621 Series
Color	Black
Configuration	Surface Mount
Convection, Forced	2°C/W @ 250 LFM
Convection, Natural	75°C @ 15 W
Dimensions	4.75 x 1.5 in.
Finish	Black Anodized
For Use With	TO-3
Material	Aluminum
Mounting Style	Vertical
Package Type	TO-3
Primary Type	TO-3
Resistance, Thermal	2 °C/W
Special Features	Extruded Heat Sink, Low-Profile
Thermal Resistance	2 °C/W
Type	Metal-Case
Weight	45.36 g
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• Lapp Group
  Connector, Strain Relief, Liquid Tight, Non Metallic, NPT-1/2" Threads
  
  型号：S1112
  仓库库存编号：70123699
  
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• Lapp Group
  Locknut, Skintop; 1/2 in.; NPT; Nylon; Black; 0.236 in.
  
  型号：911371
  仓库库存编号：70123716
  
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• Molex Incorporated
  STANDARD .062" Series 3.68mm Pitch 12 Way 3 Row Female Straight PCB Housing 1625
  
  型号：03-06-1121
  仓库库存编号：70190594
  
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Application Metal-Case Power Semiconductors  Wakefield Application Metal-Case Power Semiconductors  Heatsinks Application Metal-Case Power Semiconductors  Wakefield Heatsinks Application Metal-Case Power Semiconductors   Brand/Series 621 Series  Wakefield Brand/Series 621 Series  Heatsinks Brand/Series 621 Series  Wakefield Heatsinks Brand/Series 621 Series   Color Black  Wakefield Color Black  Heatsinks Color Black  Wakefield Heatsinks Color Black   Configuration Surface Mount  Wakefield Configuration Surface Mount  Heatsinks Configuration Surface Mount  Wakefield Heatsinks Configuration Surface Mount   Convection, Forced 2°C/W @ 250 LFM  Wakefield Convection, Forced 2°C/W @ 250 LFM  Heatsinks Convection, Forced 2°C/W @ 250 LFM  Wakefield Heatsinks Convection, Forced 2°C/W @ 250 LFM   Convection, Natural 75°C @ 15 W  Wakefield Convection, Natural 75°C @ 15 W  Heatsinks Convection, Natural 75°C @ 15 W  Wakefield Heatsinks Convection, Natural 75°C @ 15 W   Dimensions 4.75 x 1.5 in.  Wakefield Dimensions 4.75 x 1.5 in.  Heatsinks Dimensions 4.75 x 1.5 in.  Wakefield Heatsinks Dimensions 4.75 x 1.5 in.   Finish Black Anodized  Wakefield Finish Black Anodized  Heatsinks Finish Black Anodized  Wakefield Heatsinks Finish Black Anodized   For Use With TO-3  Wakefield For Use With TO-3  Heatsinks For Use With TO-3  Wakefield Heatsinks For Use With TO-3   Material Aluminum  Wakefield Material Aluminum  Heatsinks Material Aluminum  Wakefield Heatsinks Material Aluminum   Mounting Style Vertical  Wakefield Mounting Style Vertical  Heatsinks Mounting Style Vertical  Wakefield Heatsinks Mounting Style Vertical   Package Type TO-3  Wakefield Package Type TO-3  Heatsinks Package Type TO-3  Wakefield Heatsinks Package Type TO-3   Primary Type TO-3  Wakefield Primary Type TO-3  Heatsinks Primary Type TO-3  Wakefield Heatsinks Primary Type TO-3   Resistance, Thermal 2 °C/W  Wakefield Resistance, Thermal 2 °C/W  Heatsinks Resistance, Thermal 2 °C/W  Wakefield Heatsinks Resistance, Thermal 2 °C/W   Special Features Extruded Heat Sink, Low-Profile  Wakefield Special Features Extruded Heat Sink, Low-Profile  Heatsinks Special Features Extruded Heat Sink, Low-Profile  Wakefield Heatsinks Special Features Extruded Heat Sink, Low-Profile   Thermal Resistance 2 °C/W  Wakefield Thermal Resistance 2 °C/W  Heatsinks Thermal Resistance 2 °C/W  Wakefield Heatsinks Thermal Resistance 2 °C/W   Type Metal-Case  Wakefield Type Metal-Case  Heatsinks Type Metal-Case  Wakefield Heatsinks Type Metal-Case   Weight 45.36 g  Wakefield Weight 45.36 g  Heatsinks Weight 45.36 g  Wakefield Heatsinks Weight 45.36 g