Online Catalog

QSZ CLIP

Warning
Based on the conditions you entered, the selected clip / anchor combination can not be used.
Please change the clip and/or anchor combination, or contact Alpha Sales.
Please input/select the followings:
Please select Clip type.
CQZ & QSZ CLIPS
QSZ Clips and Anchor Pins

Clips and Anchor pins

Installation Image

CQZ & QSZ clips are an original mechanical attachment option developed by Alpha.
Anchor pins are mounted in the PCB, and the CQZ & QSZ clips secure the heat sink to the anchor pins while generating the attachment force and pressure. PCB thickness, device height, and anchor spacing will vary for each application. Review the following in order to select the most appropriate CQZ & QSZ clip, anchor pin, and heat sink combination.

1. CQZ (Compact QSZ) versus QSZ

Alpha offers CQZ and QSZ clips, depending on PCB hole diameter and load capacity.

CQZ clip & CNCR anchor pin
QSZ clip & ANCR anchor pin
  CQZ clip and anchor
PCB hole diameter (mm)
Φ 1.5 +/-0.05
Φ 1.8 +/-0.05
Suggested Heatsink Size
Max 50x50mm
Max 60x60mm
Clip Name Prefix CQZ QSZ
Anchor Name Prefix CNCR ANCR
CQZ Model Anchor Pin Layout
X x Y (mm)
Downloads Availability / Price / Order
Data Sheet Others

PCB Hole

Φ1.5

+/-0.05

CQZ Clip
25 x 25 catalog RoHS REACH DXF
30 x 30 catalog
30 x 35 catalog
35 x 40 catalog
40 x 45 catalog
40 x 50 catalog
40 x 55 catalog

PCB Hole

Φ1.5

+/-0.05

CQZ Clip
25 x 25 catalog
30 x 30 catalog
30 x 35 catalog
35 x 40 catalog
40 x 45 catalog
40 x 50 catalog
40 x 55 catalog
QSZ Model Anchor Pin Layout
X x Y (mm)
Downloads Availability / Price / Order
Data Sheet Others

PCB Hole

Φ1.8

+/-0.05

QSZ Clip
24 x 24 catalog RoHS REACH DXF
29 x 29 catalog
34 x 34 catalog
39 x 39 catalog
44 x 44 catalog
49 x 49 catalog
54 x 54 catalog
58 x58 catalog
64 x 64 catalog

PCB Hole

Φ1.8

+/-0.05

QSZ Clip
24 x 24 catalog
29 x 29 catalog
34 x 34 catalog
39 x 39 catalog
44 x 44 catalog
49 x 49 catalog
54 x 54 catalog
58 x 58 catalog
64 x 64 catalog
  Create Custom Size

3. Anchor Pin (CNCR & ANCR) Specification

Anchor pins remain captive to the PCB, with no solder required.

CNCR Model Size
Z (mm)
Downloads Availability / Price / Order
Data Sheet Others

PCB Hole

Φ1.5

+/-0.05

Anchor Pin
8 catalog RoHS REACH DXF
9
10
11
12
13
14
15
16
ANCR Model Size
Z (mm)
Downloads Availability / Price / Order
Data Sheet Others

PCB Hole

Φ1.8

+/-0.05

Anchor Pin
8 catalog RoHS REACH DXF
9
10
11
12
13
14
15
16

Small PCB Area

Easy-Install

quick set1

Anchor pins require very small holes in the PCB as followings:

  • - CNCR anchor pin : 1.5 +/-0.05mm diameter
  • - ANCR anchor pin : 1.8 +/-0.05mm diameter

Small footprint greatly reduces the amount of PCB space sacrificed for heat sink attachment, minimizing or eliminating the need to move board traces.

Z-Clip and QSZ-Clip

During heat sink installation, traditional Z-Clips may require the heat sink to be slightly twisted or tilted in order for the clip to engage with the board mounted anchor. This could possibly damage any pre-applied thermal interface material or even the device package or exposed die. The CQZ & QSZ clip can be installed without requiring any twisting or tilting of the heat sink.

Location and Orientation Guide

Minimize bare-die damage during heat sink installation

Location and Orientation Guide

If a heat sink is accidentally installed in the wrong orientation relative to the airflow direction, this could result in serious thermal issues. The heat sink layout can be designed to incorporate anchor pin locations inside the heat sink footprint. The anchor pins would have to pass through holes in the heat sink, ensuring proper orientation.

Kept horizontal position

Exposed dies can be damaged if the heat sink attachment load is applied to the edges or corners of the die. This can happen if the heat is tilted during installation. If the anchor pins are located inside of the heat sink footprint, they will act as guides when the heat sink is installed. The tight clearance between the anchor pins and the clearance holes will greatly reduce the ability of the heat sink to tip or tilt during installation, preventing contact with the edges or corners of the die.


Guidance for installing procedure

1. Insert anchor pins

1. Align the heat sink with the chip and anchor pins.

1-1. Inspect anchor pins

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

2. set heatsink

2. Gently place the heatsink on the top of the chip.

3. Set clip

3. Attach one end of the clip’s hook plate to the anchor pin. Attach the hook plate by bringing it in from the outside and locking it into the pin.
(follow arrow direction)

4. Reverse side

4. While applying light pressure to the heat sink to keep it level, lock in the hook plate on the opposite side.

4-1. Press

4-1. Detail of locking procedure:Push the hook plate down.

4-2. Lock

4-2. Slide the hook plate in, toward the anchor pin. Make sure the hook plate slides in under the anchor pin head. Release the hook plate, locking it in place. Inspect the hook plate and pin head to ensure the hook plate is firmly seated and locked.

5. Done

5. Done!

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V (vertical) type

QSZ Clip V

AIR FLOW

H (horizontal) type

QSZ Clip H

AIR FLOW

Regarding pairing with standard heat sinks, please refer to the following paring table.

  • This table only lists the physical dimensions as OK or not OK. Please consult Selecting a heat sink to determine if the heat sink will meet the thermal requirements.
  • In some cases, the clip may not be able to contact the exact center of a particular heat sink. This will depend on the fin pattern, air direction, and other factors.
  • Please check for fit and ease of attachment when using one of these wire clips. In some cases, installation can be difficult, requiring a twisting motion to install the clip and heat sink.
  • This table displays heat sink and CQZ & QSZ clip pairings based on the direction of clip attachment. With the V type (right above photo), the CQZ & QSZ clip run perpendicular (opposite) of airflow/fin direction. The H type (right bottom photo) runs parallel (inline) with the airflow/fin direction. Please refer to the photos and check the airflow direction prior to pairing selection.

The meaning of each Symbol

SymbolDescription
OK CQZ & QSZ clip can be assembled at the center of Heat sink.
CQZ & QSZ clip can NOT be assembled at the center of Heat sink. We do not recommend this attachment in the case of a "V" type. The clip pressure point would be too far from the center.
Blank CQZ & QSZ clip can not be used at all.
* Due to installation difficulty, we do not recommend the use of CQZ & QSZ clips on these series heat sinks if they are taller than 15mm.

Please click part number for detail information such as specification, performance data.

CQZ
-
-
QSZ
V H V H V H V H V H V H V H V H V H
LPD15 OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK
LPD17 OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK
LPD19 OK OK OK OK* OK* OK* OK* OK* OK*
LPD22 OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK
LPD25
LPD28 OK OK OK OK OK OK OK
LPD30 OK OK OK OK OK OK OK
LPD32 OK OK OK OK OK OK OK OK OK OK OK OK
LPD35
LPD38 OK OK OK OK OK OK OK OK OK OK
LPD40 OK OK OK OK OK
LPD42 OK OK OK OK OK OK OK OK
LPD45 OK OK OK OK
LPD50 OK OK OK
LPD52 OK OK OK OK
LPD54
LPD60 OK OK
LPD2030 OK OK OK OK OK OK OK OK
LPD2040 OK OK OK OK OK OK OK OK
LPD3020 OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK
LPD3040 OK OK OK OK OK OK OK OK OK OK OK
LPD3550 OK OK OK OK OK
LPD4020 OK OK OK OK OK OK OK OK OK OK OK OK
LPD4030 OK OK OK OK OK OK OK OK OK OK OK
LPD4060 OK OK OK OK OK
LPD5035 OK OK OK OK OK OK OK OK
LPD6040 OK OK OK OK OK
MD30 OK OK OK OK OK OK OK
MD35
MD40 OK OK OK OK OK
MD45 OK OK OK OK
MD50
MD54 OK OK
MD60 OK
MD4050 OK OK OK OK OK OK OK OK OK
ULP50 OK OK OK OK OK OK
ULP60 OK OK
W15 OK OK OK OK* OK* OK* OK* OK* OK*
W30 OK OK OK OK OK OK OK
W35 OK OK OK OK OK OK
W40 OK OK OK OK OK OK OK OK OK OK
W45 OK OK OK OK OK OK OK OK
W48 OK OK OK
W54
W60
TL19 OK OK OK OK OK OK OK OK OK
TL25 OK OK OK OK OK OK OK OK
TL30 OK OK OK OK OK OK OK
TL35 OK OK OK OK OK OK
TL40
For UB series We can offer the equivalent UBZ series heatsinks, designed specifically for use with clips in both vertical and horizontal directions, in the exact center.
UB10 OK OK OK OK OK OK OK OK OK
UB15 OK OK OK OK OK OK OK OK OK
UB17 OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK
UB19 OK OK OK OK* OK* OK* OK* OK* OK*
UB22 OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK
UB25 OK OK OK OK OK* OK OK* OK OK* OK OK* OK OK* OK OK* OK
UB28 OK OK OK OK OK OK OK OK OK OK OK OK OK OK
UB30 OK OK OK OK OK OK OK
UB32 OK OK OK OK OK OK
UB35 OK OK OK OK OK △* OK
UB38 OK OK OK OK OK OK OK OK OK OK
UB40 OK* OK* OK* OK* OK*
UB42 OK OK OK OK OK OK OK OK
UB45 OK* OK* OK* OK*
UB48 OK* OK OK* OK OK* OK
UB50 OK* OK* OK*
UB52 OK OK OK OK
UB54
UB60
UB2010
UB2030 OK OK OK OK OK OK OK OK
UB2035 OK OK OK OK OK OK OK OK
UB2040 OK OK OK OK OK OK OK OK
UB3020 OK OK OK OK OK OK OK OK OK OK OK OK OK
UB3040 OK OK OK OK OK OK OK OK OK OK OK
UB3550 OK OK OK OK OK OK OK OK
UB4020 OK OK OK OK OK OK OK OK OK OK OK OK
UB4030 OK OK OK OK OK OK OK OK OK OK OK
UB4060 OK OK OK OK OK
UB5035 OK OK OK
UB6040 OK OK OK OK OK
UBC60
UBZ40 OK OK OK OK OK OK OK OK OK OK
UBZ45 OK OK OK OK OK OK OK OK
UBZ50 OK OK OK OK OK OK
UBZ54 OK OK OK OK
UBZ60 OK OK
For Z series We can offer the equivalent ZZ series heatsinks, designed specifically for use with clips in both vertical and horizontal directions, in the exact center.
Z19 OK OK
ZZ40 OK OK OK OK OK OK OK OK OK OK
ZZ45 OK OK OK OK OK OK OK OK
ZZ50 OK OK OK OK OK OK
ZZ54 OK OK OK OK
ZZ60 OK OK
T QSZ clip can not be used for T series.
S1515 OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK
S1519
S1525
S1530 OK OK OK OK OK OK OK OK OK OK OK OK OK OK
S1535
S1540
S1545
S1550 OK OK OK OK OK OK
S1555
S1560 OK OK
ST15
ST19
ST25 OK OK OK OK
ST30
ST35
ST40
ST60
N19
N25
N30
N35
N40
N45
N50
N54
N60
CS40 OK OK OK OK OK OK OK OK OK OK
CS45 OK OK OK OK OK OK OK OK

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Clip load diagram

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

1st, Calculate X value of graph, using the formula below the graph.
2nd, Y value (Clip load) can be found from the intersection of "X value" and "CQZ & QSZ clips performance line".

Clip load graph

  • Clip Load Calculator
Clip Type
Clip

Force

**.**   kgf

Pressure

**.**   kgf/cm2
Anchor Pin
Heat Sink Base Thickness mm
Chip Contact Area mm   x mm

Input Unit:

   
Chip Height mm
PCB thickness mm

Custom QSZ clip

A custom clip can be created if none of our standard clips are compatible with your PCB layout.
Please use our online QSZ Clip Design Tool. Simply enter your design information and submit the request.


  • Cost & Lead time Information :
  •   No NRE/Tooling fee is required.
  •   Estimated unit cost is $20.00 for 10pcs, $3.00 for 100pcs, and $1.50 for 300pcs.
  •   Prototype lead time is approximately 2 weeks. Production lead time is 2-4 weeks.


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