# 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.

## 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"

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## Images

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