690-3B The Wakefield-Vette 690-3B is a board level extrusion heat sink designed for TO-3 packages. It features black anodized aluminum construction with a thermal resistance of 2.00°C/W at 400 LFM and can dissipate 7.5W at a 44°C temperature rise.
Mfr Part #:

690-3B

Available from 1 distributors
Mfr Name: Wakefield-Vette
Wakefield-Vette
The Wakefield-Vette 690-3B is a board level extrusion heat sink designed for TO-3 packages. It features black anodized aluminum construction with a thermal resistance of 2.00°C/W at 400 LFM and can dissipate 7.5W at a 44°C temperature rise.
✓ Total Stock: 43 pcs

690-3B Available from 1 distributor

✓ Authorised
✓ Non-Authorised
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43 pcs
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690-3B Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Attachment Method
Fin Height
Length
Material
Material Finish
Mounting Type
Package Cooled
Power Dissipation @ Temperature Rise
Shape
Thermal Resistance @ Forced Air Flow
Type
Width

690-3B Description

Short technical summary and product information.

The Wakefield-Vette 690-3B is a board level extrusion heat sink specifically designed for cooling TO-3 semiconductor packages. Constructed from aluminum with a black anodized finish, it offers a balance of thermal performance and corrosion resistance.

 

Under forced air convection at 400 LFM, the heat sink achieves a thermal resistance of 2.00°C/W. It can dissipate up to 7.5W with a 44°C temperature rise above ambient. The square finned shape maximizes surface area for efficient heat transfer.

 

Mounting is accomplished via a bolt-on attachment method, ensuring secure mechanical and thermal contact with the TO-3 device. The compact footprint of 47.24mm x 47.24mm with a fin height of 33.27mm makes it suitable for board-level applications where space is constrained.

690-3B Quick Information

Product Type: Heat Sink
Canonical Name: Wakefield-Vette 690-3B Board Level Extrusion Heat Sink
Subcategory: Extrusion Heat Sink

690-3B Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

690-3B Features

  • Black anodized aluminum extrusion construction.
  • Designed for TO-3 package cooling.
  • Thermal resistance of 2.00°C/W at 400 LFM.
  • Dissipates 7.5W at 44°C temperature rise.
  • Bolt-on attachment for secure mounting.

690-3B Applications

  • Ideal for cooling TO-3 power transistors.
  • Used in forced air convection applications.
  • Suitable for board-level thermal management.

690-3B FAQs

7 frequently asked questions generated from this part’s specifications.
What package is the 690-3B heat sink designed for?

The 690-3B is designed to cool TO-3 packages.

What is the thermal resistance of the 690-3B?

The thermal resistance is 2.00°C/W at 400 LFM forced air flow.

What is the power dissipation capability?

It can dissipate 7.5W at a 44°C temperature rise.

What material is the heat sink made of?

It is made of aluminum with a black anodized finish.

How is the heat sink attached?

It uses a bolt-on attachment method.

Is the 690-3B RoHS compliant?

It is listed as RoHS3 compliant, but this is unverified.

What are the dimensions of the heat sink?

It has a square shape with fins, dimensions 47.24mm x 47.24mm and fin height 33.27mm.

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