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PUSH PIN

Push pins are a popular mounting option that offers flexible and reliable attachment.
Several standard push pin sizes are available, while springs generate the appropriate mounting force/pressure. Alpha can design and produce the entire assembly, including the heat sink, push pins, springs, and thermal interface material.

Model		PCB Hole Dia (mm)	A (mm)	B (mm)	Download			Availability / Price / Order
	PIP2.5X9	2.500	1.00	9.00		STEP	IGES	Model Name:  Quantity −+ Check availability RFQ Order For US Customer days after order. For Other Area Customer days after order. Contact Alpha SalesClose
	PIP2.5X10			10.00		STEP	IGES
	PIP2.5X11			11.00		STEP	IGES
	PIP2.5X12			12.00		STEP	IGES
	PIP2.5X14			14.00		STEP	IGES
	PIP2.5X18			18.00		STEP	IGES
	PIP3X9	3.000		9.00		STEP	IGES
	PIP3X10			10.00		STEP	IGES
	PIP3X11			11.00		STEP	IGES
	PIP3X12			12.00		STEP	IGES
	PIP3X14			14.00		STEP	IGES
	PIP3X18			18.00		STEP	IGES
	PIP3.175X7.0[TH]	3.175	0.89	7.00		STEP	IGES
	PIP3.175X8.5[TH]			8.50		STEP	IGES
	PIP3.175X9.8[TH]		1.27	9.80		STEP	IGES
	PIP3.175X11[TH]			11.00		STEP	IGES
	PIP3.175X11.5		1.55	11.50		STEP	IGES
	PIP3.175X13.2			13.20		STEP	IGES
	PIP3.175X14.3			14.30		STEP	IGES
	PIP3.175X18.8			18.80		STEP	IGES
	PIP3.175X20.3			20.30		STEP	IGES

2. Features

Proven Design

Push pins are a popular mechanical attachment, offering flexibility & reliability at reasonable cost.

Flexible Design

Hole location and attachment forces can be customized for each specific application.

Simple & Easy

Captive Push pins and springs allow for a simple installation. Easy!

Robust

Push pin attachment has passed all shock and vibration testing.

Attachment Force

Appropriate attachment force/pressure can be consistently generated through Push pin/spring selection.

High Performance

High performance interface materials including phase change and thermal grease can be used instead of tape or epoxy.

Please visit Spring Selection page.

• Gently place the heat sink on the device, while aligning the pins with the board holes.
• Place one hand on top of the heat sink to prevent the heat sink from tilting while installing the pins.
• While maintaining moderate pressure to the heat sink with one hand, snap the pins through the board with the other hand. Snap the pins through one at a time. Ensure the pins snap completely through the board. However, do not apply excessive force, or the spring may fully compress, applying all of the application force to the device.
• If more than two pins are used, install the pins in an alternating, crisscross pattern.

• Access to the backside of the board is required for removal. This may require that the board is removed from the chassis/system.
• Compress the split ends of the push pins, while gently pulling on the pin from top side of the board. Use of a small pair of pliers may make it easier to compress the end of the pins. However, do not use a pair of pliers with a serrated edge, as this may damage the pins. Do not overcompress the split end of the pins, just enough force to get the split end to snap back into the hole is required.

Although push pin attachment is reworkable, we do not recommend using the same pins for multiple installations/removals. The pin ends may become deformed after multiple uses. Additional pins can be ordered as spares.

Alpha offers the following standard push pin attached heat sinks:

Passive Heatsink			No attachment tab LPDM, LPDH, LPDP, UBM, UBH, UBP, ZM, ZH Series				With attachment tab LPDR, LPDL, UBR, UBL, NR, SR Series
Active Heatsink			No attachment tab FSP Series				With attachment tab FSR Series				No attachment tab FF Series

Typical attachment methods
Test Report (Shock and Vibration)