SMPS Heat Sink For Switching Power Supplies

A low-profile aluminum SMPS heat sink engineered for the tight enclosures of switched-mode power supplies. From wall adapters to enclosed industrial PSUs, our extruded and CNC-machined coolers keep MOSFETs, diodes, and magnetics within safe temperatures - without forcing a redesign of your chassis.

 

 

- Low-profile custom profiles that fit compact PSU enclosures
- Matched mounting for TO-220 / TO-247 / D²PAK devices
- 6063-T5 aluminum, optional anodized finish
- Natural convection or fan-assisted configurations

 

 

 

A switching power supply heatsink removes the heat generated by the active devices inside an SMPS - the MOSFETs in the primary and synchronous rectifiers, the fast recovery diodes, and the snubber networks. Because switched-mode supplies pack high power into a small volume, component temperatures rise quickly and reliability drops unless that heat is conducted away efficiently. A purpose-shaped power supply aluminum heatsink is the simplest, most cost-effective way to keep those parts cool.

Our SMPS coolers are extruded aluminum bodies with a CNC-machined mounting surface and a shallow fin array tuned for the limited height inside a power-supply case. We drill and tap holes to match common packages - TO-220, TO-247, D²PAK - so devices clamp on squarely with good thermal contact. For enclosed units we can add standoffs, insulation slots, and mounting tabs so the cooler integrates without touching live parts. Every profile is customizable to your board layout and enclosure.

Engineering note for buyers:

Component junction temperature should stay below its rated maximum (often 125–150 °C for MOSFETs). Share the device part number, dissipated power, max ambient, and whether the supply is fan-cooled, and we will recommend profile height, fin count, and whether an insulator is needed.

 

 

 

 

Consistent & Export-Ready

 

Material certificates, RoHS/REACH statements, and inspection reports ship with every batch. We support L/C, T/T, and standard Incoterms.

For Procurement Teams

 

 

Exact Fit, Measured Data

 

Flatness, hole spacing, and thermal resistance are measured and reported. STEP files and 2D drawings are provided for design-in.

For Power Supply Engineers

 

Drop-In Custom Profiles

 

Low-profile shapes built to your enclosure and PCB keep-out zones, so no costly chassis redesign.

For PSU OEMs

 

Branding & Volume Pricing

 

Laser marking, neutral packaging, and tiered pricing for recurring volume orders.

For Distributors

 

 

 

Reference low-profile build. Heights, lengths, and hole patterns are customized to your supply.

 

Parameter	Specification
Material	Aluminum 6063-T5 (optional 6061-T6)
Profile Height	Low-profile 10-40 mm standard (custom taller on request)
Base Flatness	≤ 0.1mm across mounting face (CNC machined)
Device Mounting	TO-220 / TO-247 / D²PAK holes; insulated-slot option
Surface Finish	Natural, sandblasted, clear or black anodized (optional)
Thermal Resistance(typical)	~1.2–4.0 °C/W depending on size and airflow
Cooling Method	Natural convection or small-fan assisted
Operating Temperature	-40 °C to +125 °C component-side
Certifications	RoHS, REACH compliant; ISO 9001 manufacturing
Packaging	PE bag + carton; palletized for sea/air freight

 

 

 

 

 

 

SMPS Heat Sink Selection Guide

 

Match the cooler to your supply type and power density. Send the device part number and loss for a verified recommendation.

 

Supply Type	Typical Power	Recommended Heat Sink
SingleWall adapter / brick	10-100W	Very low-profile clip-on fin, natural convection
Open-frame supply	50-300W	Low-profile extruded fin with TO-220/247 holes
Enclosed / metal-case PSU	100-1000W	Taller fins+optional internal fan; insulated mounting
DIN-rail supply	30-480 W	Slim profile shaped to rail enclosure, vertical fins
LED driver / constant-current	20-400 W	Anodized, compact, often passively cooled

 

 

 

 

 

We act as a manufacturing partner for power-supply makers. Share your PCB layout or enclosure drawing and we will engineer the cooler to fit.

 

 

 

 

 

 

 

Q:What is an SMPS heat sink and why is it needed?

An SMPS heat sink dissipates heat from the MOSFETs, diodes, and rectifiers inside a switched-mode power supply. Without it, those parts exceed their junction temperature and the supply fails or degrades.

Q: Can you match TO-220 / TO-247 mounting?

Yes. We drill and tap holes for TO-220, TO-247, and D²PAK devices, with an optional insulated slot so the cooler stays isolated from live terminals.

 

Q: Do you make low-profile shapes for tight enclosures?

Yes. Our standard profiles run 10–40 mm tall and are customized to your enclosure height and PCB keep-out zones.

 

Q: What is the MOQ and lead time?

Samples ship in 7–10 working days. Small-batch production is typically 2–3 weeks; volume depends on quantity and finish. Flexible MOQ for first-time buyers.

 

Q: Do you provide thermal calculations?

Yes. Send the device part number, dissipated power, max ambient, and cooling method, and we will recommend profile height, fin count, and insulation needs.

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