> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# TO-220 Clip-On Heatsink

**Type:** Product page · **SKU:** ADA977 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/to-220-clip-on-heatsink.html ([markdown](https://core-electronics.com.au/to-220-clip-on-heatsink.html.md))

Get the most out of your regulators, transistors and other TO-220 packaged chips by clipping on a heat-sink. Your transistor or regulator may advertise it can handle...

## Pricing

- **Price:** $2.10 (inc GST) — $1.91 AUD, exc GST
- **Quantity discounts:** 10+ $1.85 (exc GST) · 50+ $1.82 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 19 and Aug 24.

## How to buy

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- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

Get the most out of your regulators, transistors and other TO-220 packaged chips by clipping on a heat-sink. Your transistor or regulator may advertise it can handle high currents but when multiplied by the drop voltage, the Wattage may be too high for the bare chip! Most TO-220's can disipate about 2W's worth without a sink.

This basic, and easy-to-use ~25°C/W sink will let you burn about 3 Watts of power through a TO-220 (assuming an ambient temperature of 25°C and max die temp of 85°C). No screws or thermal paste required. For more detailed calculations, check out the Daycounter heatsink calc

## Technical Details 

**Revision History:**

- **As of July 2, 2020** Adafruit are selling a different design of this heat sink (the previous version is no longer available). The new version is more compact but has slightly higher thermal resistance.

Weight: 1.88g

Dimensions: 19mm x 13mm x 13mm

Product Dimensions: 19.0mm x 13.0mm x 13.0mm / 0.7" x 0.5" x 0.5"

![RoHS 2 2011 65 EU Compliant](https://core-electronics.com.au/attachments/localcontent/RoHS2_2011_65_EU_7356c5574c.svg)![RoHS 2 2015 863 EU Compliant](https://core-electronics.com.au/attachments/localcontent/RoHS2_2015_863_EU_86773f57f9.svg)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/9/7/977-06.jpg)