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Accessory - Quick Set

Introduction - QuickSet (QT series)

Quick Set Pictures

There are many different devices (ASICS, FPGAs, CPUs, etc..). Each with a different mechanical and thermal requirement. To meet with these requirements, it is important to select an appropriate heat sink and attachment method.
The QuickSet series was developed to meet these requirements. Heat Sinks are mounted directly to the PCB with anchor pins that take up a minimum of board real estate. Attachment forces and shock loads are transmitted to the PCB instead of the chip and solder balls. The attachment force from the torsion springs generates the appropriate attachment load to the heat sinks and mounting pressure on the thermal interface material.


QuickSet was Revised

In Jan-2018, the QuickSet series was revised from the QS to QT series. The new QT series offers several design advantages including layout flexibility at a lower price point, without the need for additional NRE/tooling fees.”
New QuickSet (QT series) specification
Old QuickSet (QS series) specification

Features and advantages

qt series photo1 qt series photo2 qt series photo3
Small PCB Area

Mounting pins only require 1.8mm[.071"] diameter holes in the PCB. Small footprint greatly reduces the amount of PCB space sacrificed for heat sink attachment, minimizing or eliminating the need to move board traces.

Stable & Robust

Heat sinks are mechanically attached to the PCB instead of the chip package or substrate. Shock and vibration loads are transferred to the PCB instead of the chip and solder balls.

Location and Orientation Guide

Heat sink location and orientation is precisely set by anchor pin. The possibility of damaging the chip, heat sink, or thermal interface material during installation is greatly reduced as well as the possibility of installing the heat sink in the wrong orientation or location.

Flexible Customization

Anchor pin location can be changed to meet PCB layout requirement.

Attachment Force

With several different torsion spring and anchor pins, appropriate attachment force can be applied.


Heat sink comes pre-assembled with clip, ready for installation.
It come easy to supervise parts and station.


Press and slide to install. Easy!

Torsion Spring and Load Chart

Model Wire Diameter (mm) Attachment force range per a torsion spring (kgf)
S001YZ4J Anchor Pin 0.8 0.8 ~ 1.2
S001YZ4N 0.9 1.1 ~ 1.7
S001YZ4M 1.0 1.5 ~ 2.3

The torsion spring load on the heat source can be calculated by the following chart. Please note that this data is just for reference. Unknown dimensions and tolerances can significantly affect the load on the heat source.

Display Load Chart

Anchor Pin Specification

Model Size
Z (mm)


Installation Procedure

Guidance for installing procedure

1. Insert anchor pin

1. Insert anchor pins from back side of PCB.

2. set heatsink

1-1. Confirm that the anchor pin is fully inserted.

3. Set clip

2. Gently place the heat sink on the top of the chip, aligning the anchor pin and heat sink hole.

3-1. Press

3. Attach one end of the torsion spring’s hook plate to the anchor pin.

3-2. Lock

3-1 While applying light pressure to the heat sink to keep it level, press the hook plate down.

4. Reverse side

3-2 Slide the hook plate to outside of the heat sink. Anchor pin is locked to the hook plate.

4. Reverse side

4. Attach the hook plate of other side as the same procedure with step 3.

5. Done

5. Done!

Removal Procedure

Removal procedure can be done in the reverse order of the installation procedure.
If a phase change material is used with the heat sink, remove the phase change material completely from the chip and heatsink, then, apply a new piece of thermal interface material.

Easy Customization

We can customize QT series. Typically we can change hole location, overall height, etc... without tooling/NRE fee. Please choose the heatsink and provide customization details to sales.

Load Adjustment

The attachment load can be changed by adjusting the load adjustment pin height.

How to determine the attachment force/load:

quick set6
  1. Determine Y value : Y = PCB thickness + Chip height
  2. Make sure that Y value is within the working range.
  3. Choose K value from graph.

If the attachment force needs to be modified, requiring a different pin height,
please contact Alpha sales.

load adjustment

Related Information

Heat Sink Attachment
Shock and Vibration Test

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