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Small PCB Area

Mounting pins only require 1.8mm[.071"] diameter holes in the PCB.

Easy-Install

Heat sink comes pre-assembled with clip, ready for installation. Press and slide to install. Easy!

Stable & Robust

Attachment forces are transferred to the PCB instead of the device or solder balls.

Location and Orientation Guide

Heat sink location and orientation is precisely set by anchor pin.

Flexible Customization

Anchor pin locations can be changed without requiring a tooling/NRE fee.

Attachment Force

By using different torsion springs and anchor pins, the appropriate attachment force can be generated.

2. Torsion Spring Specification and Load Chart

Three torsion spring options are available. Individual torsion springs are NOT available as seperate part numbers.

	Model	Wire Diameter (mm)	Attachment force range per torsion spring (kgf)
	S001YZ4J	0.8	1.0 ~ 1.3
	S001YZ4N	0.9	1.4 ~ 1.9
	S001YZ4M	1.0	1.9 ~ 2.7

1st, Calculate X value (T) of graph, using the formula below the graph.
2nd, Y value (Force) can be found from the intersection of "X value (T)" and "Torsion spring performance line".

3. Anchor Pin Specification

Anchor pins are captive and installed from the backside of the PCB. No solder is required.

	Model	Size Z (mm)	Downloads		Availability / Price / Order
			Data Sheet	Others
	ANCR-8	8			Model Name:  Quantity −+ Check availability RFQ Order For US Customer days after order. For Other Area Customer days after order. Contact Alpha SalesClose
	ANCR-9	9
	ANCR-10	10
	ANCR-11	11
	ANCR-12	12
	ANCR-13	13
	ANCR-14	14
	ANCR-15	15
	ANCR-16	16

• Guidance
• 1. Insert anchor pin
• 1-1. Inspect anchor pins
• 2. Set heat sink
• 3. Assemble the torsion spring
• 3-1. Press the hook plate
• 3-2. Slide and lock the hook plate
• 4. Reverse side in the same manner
• 5. Done
• Movie
• Display all

Guidance for installing procedure

1. Insert anchor pins from back side of PCB.

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

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

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

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

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

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

5. Done!

Removal procedure is the reverse of the installation procedure.
If a phase change material is used with the heat sink, unhook the hook plate from the anchor pin first. Warm the heatsink with a heat gun until the phase change temperature is reached. Gently remove the heat sink with a twisting motion. If the heat sink has to be re-installed, completely remove the phase change material from the heatsink and device before installing a fresh piece of phase change material.

Alpha can customize the QT series. Hole locations, overall height, etc.. can be changed without the need for a tooling/NRE fee. Please choose the heatsink and provide customization details to Alpha Sales.