heat sink paste: ADC12 die-cast aluminium, 0.8 mm fins at 2.5 mm pitch, 0.15 mm over 100 mm flatness, 1.10 K/W thermal resistance. MOQ 50 pcs, ships in 7 wor...
heat sink paste: ADC12 die-cast aluminium, 0.8 mm fins at 2.5 mm pitch, 0.15 mm over 100 mm flatness, 1.10 K/W thermal resistance. MOQ 50 pcs, ships in 7 wor...
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Heat sink paste refers to the thermal interface material used with a heat sink, but this part is a one-piece ADC12 die-cast aluminium heat sink with a 1.5 mm base and 0.8 mm fins. Stamped on 110 T tooling, it holds 0.15 mm over 100 mm, returns 1.10 K/W at ΔT = 60 K, and runs 800,000 pcs monthly.
Related reading: 'Building a Quality Plan for Stamped Parts'.
A 1.5 mm base and 0.8 mm fins define this heat sink paste. Pressed from ADC12 die-cast aluminium on 110 T tooling, it holds 0.15 mm over 100 mm and returns 1.10 K/W at ΔT = 60 K, natural convection. Monthly output runs at 800,000 pcs.
Stamping gives a repeatable 0.8 mm fin profile that extrusion cannot hold: the die forms every fin in one stroke, so pitch stays within ±0.05 mm across a 800,000 pcs run.
Low fin gauge is where stamping wins: 0.8 mm fins at 2.5 mm pitch give more surface per cubic millimetre than a machined or extruded profile of the same envelope.
The one-piece geometry removes the adhesive layer found in two-part coolers, cutting the thermal path. Nothing sits between ADC12 die-cast aluminium and the airflow except the stamped surface itself.
Stamped construction tolerates batch variation better than extrusion: die wear shows up first as a measurable shift in fin pitch, which inspection catches at CMM plus 100% hydraulic press leak test rather than in the field.
One supplier now covers 0.8 mm to 0.8 mm fin gauges from the same 110 T press family, so a thermal redesign is a tooling change rather than a new vendor.
The standard material is ADC12 die-cast aluminium, supplied with clear anodize Type II, 5-10 µm. For applications where switch-mode power supply exposure is a concern, we recommend the passivated route; where conductivity matters more than weight, copper C110 raises thermal performance and roughly doubles unit mass.
General dimensions run to ±0.10 mm, with critical features such as ±0.05 mm on mounting hole position held separately. Formed geometry inherits tooling repeatability of ±0.05 mm, and hole position is held to ±0.10 mm. Tighter classes need an extra press operation, so it is worth deciding before tooling rather than after.
Flatness is checked on a granite surface plate, 20 °C against a 0.15 mm over 100 mm limit, and fin pitch is verified optically at ±0.05 mm. Reports go out with each lot.
Lot traceability runs from coil to carton: heat number, press stroke range and inspection record stay attached, so a field issue can be tied back to a specific run.
Flatness is measured on granite rather than on cast iron, because 0.15 mm over 100 mm at 200 x 100 x 80 mm reads differently on a plate that has not been lapped. Records keep both readings.
We inspect 0.8 mm fin tips for burr and crack after forming, because stamping can split a root without shifting any drawing dimension. Burr limit is set per part.
switch-mode power supply programs are the reason this geometry exists. Where the enclosure cannot grow taller, fin density is the only lever, and 2.5 mm pitch with 0.8 mm stock is the practical ceiling for aluminium.
See also: Coil Stock Optimization: Strip Width, Nesting and Scrap Rate.
Where a heat sink paste runs at switch-mode power supply volumes, part-to-part consistency decides field returns. ±0.05 mm on a 800,000 pcs run keeps the thermal curve inside one band.
Learn more about BQUQ 1 260611223434a1 Extruded Heat Sink.
switch-mode power supply packaging and vibration rules push toward one-piece construction. A stamped heat sink paste has no adhesive to creep, which is the usual failure mode in two-part coolers.
Further technical detail: Customized Non Standard Compression Spring.
Designers working on switch-mode power supply ask for flatness before they ask for thermal data, because switch-mode power supply assembly is automated and a non-flat base stops the line.
| Parameter | Value / Range |
|---|---|
| Material | ADC12 die-cast aluminium |
| Fin thickness | 0.8 mm |
| Fin pitch | 2.5 mm |
| Fin height | 50 mm |
| Base thickness | 1.5 mm |
| Base flatness | 0.15 mm over 100 mm |
| Thermal resistance | 1.10 K/W |
| Thermal test condition | ΔT = 60 K, natural convection |
| Surface finish | clear anodize Type II, 5-10 µm |
| Size range | 200 x 100 x 80 mm |
MOQ is 50 pcs for a prototype run and 5000 pcs for production. Below the prototype quantity the tooling amortisation dominates the unit cost, so we quote the sample route instead: sample fee 30-80 USD.
Every lot is inspected with CMM plus 100% hydraulic press leak test, and the report is included in the shipment. We check 0.15 mm over 100 mm, 2.5 mm, 1.5 mm and hole position against ±0.10 mm. Lot traceability from coil to carton is kept for 10 years.
General dimensions run to ±0.10 mm; critical ones such as ±0.05 mm on mounting hole position are held separately. Formed features inherit tooling repeatability of ±0.05 mm. If your drawing needs tighter, tell us before tooling so we can plan the extra press operation.
Recommended reading: Global Hardware Spring Industry Panorama Report 2026: Market Size, Growth Drivers, and Future Outlook.
We test at ΔT = 60 K, natural convection and report 1.10 K/W. That is a steady-state figure, not a transient: for switch-mode power supply first-power-on behaviour you need a different test, and we can run it on request.
Compare it with heat sink compound thermal paste.
We supply a 2D drawing with the CMM report, and 3D STEP on request. Both show flatness callouts and tooling split lines, which matters if you are checking 0.15 mm over 100 mm in your own assembly.
Related reading: Precision U Shaped Aluminum Heatsink Channel.
The line sits in Dongguan in a single ISO9001 plant. 110 T presses cover the heat sink paste family, and 800,000 pcs per month is current committed output.
Source-direct from Dongguan: coil stock, forming, surface treatment and inspection happen in one building, so 0.15 mm over 100 mm flatness is verified before the part is packed.
See also: cnc turning parts.
Our switch-mode power supply experience runs back to the first tooling programme in 2015. That history is why the standard clear anodize Type II, 5-10 µm and ±0.10 mm are conservative rather than optimistic.
Request a quote: sc@bquq.com | WhatsApp +86 13713157787 | Dongguan, China
Learn more about heat sink compound.
Further technical detail: aluminum heat sink for seeed studio xiao.
Recommended reading: What Is a Stamping Insert Mold and When Do You Need One?.
| Parameter | Value / Range |
|---|---|
| Material | ADC12 die-cast aluminium |
| Tolerance | 0.15 mm over 100 mm; fin pitch ±0.05 mm |
| Lead time | Tooling change dependent; not specified in excerpt |
| MOQ | Not specified in excerpt |
| Capacity | 800,000 pcs per month |
| Option | Best for | Trade-off |
|---|---|---|
| Stamped one-piece heat sink | High-volume 0.8 mm fin profiles with 2.5 mm pitch | Requires 110 T tooling; fin gauge limited to stamped range |
| Extruded heat sink | Simple profiles and lower tooling cost | Cannot hold 0.8 mm fin profile repeatably; batch variation from die wear |
| Machined heat sink | Prototypes and tight custom geometry | Higher cost per part; less surface per cubic millimetre at same envelope |
| Two-part cooler with adhesive | Mixed-material or complex assemblies | Adhesive layer adds thermal resistance to the path |
| Stage | Control | Record |
|---|---|---|
| Stamping | 110 T die forms every fin in one stroke; pitch within ±0.05 mm | Fin pitch measurement |
| Dimensional inspection | CMM checks 0.15 mm over 100 mm | CMM report |
| Leak test | 100% hydraulic press leak test | Leak test result |
| Thermal performance | 1.10 K/W at ΔT = 60 K, natural convection | Thermal test data |
| Shipment | Inspection before every shipment | Inspection record |
It returns 1.10 K/W at ΔT = 60 K under natural convection. The 1.5 mm base and 0.8 mm fins on a 2.5 mm pitch provide the surface area needed for that performance in a one-piece ADC12 die-cast aluminium body.
It is pressed from ADC12 die-cast aluminium on 110 T tooling. This alloy supports the 0.8 mm fin profile and 2.5 mm pitch, and the one-piece geometry removes the adhesive layer found in two-part coolers.
The die forms 0.8 mm fins at 2.5 mm pitch in one stroke, with pitch staying within ±0.05 mm across an 800,000 pcs run. One supplier covers 0.8 mm to 0.8 mm fin gauges from the same 110 T press family.
It holds 0.15 mm over 100 mm. Fin pitch is controlled to ±0.05 mm, and die wear shows up first as a measurable shift in fin pitch, which inspection catches at CMM plus 100% hydraulic press leak test.
Monthly output runs at 800,000 pcs. The 110 T tooling and one-stroke fin forming support that volume while keeping pitch within ±0.05 mm across the run.
Inspection before every shipment includes CMM checks for the 0.15 mm over 100 mm tolerance and a 100% hydraulic press leak test. Die wear appears first as a fin pitch shift, so this catches variation before it reaches the field.
Compare it with Heat Pipe Technology: Working Principles and Applications in Precision Manufacturing.
Yes. One supplier covers 0.8 mm to 0.8 mm fin gauges from the same 110 T press family, so a thermal redesign is a tooling change rather than a new vendor. The stamped process tolerates batch variation better than extrusion.
| Parameter | Specification |
|---|---|
| Material | ADC12 die-cast aluminium |
| Fin thickness | 0.8 mm |
| Fin pitch | 2.5 mm |
| Fin height | 50 mm |
| Base thickness | 1.5 mm |
| Base flatness | 0.15 mm over 100 mm |
| Thermal resistance | 1.10 K/W |
| Surface finish | clear anodize Type II, 5-10 µm |
| Monthly capacity | 800,000 pcs |
| MOQ (prototype) | 50 pcs |
| Lead time (production) | 20 working days |
| Size range | 200 x 100 x 80 mm |
