Product Overview
Black Clip-On TO-220 Heatsink - Snaps Over the Tab, No Screws and No Thermal Paste
Condition
Unused new old stock, pulled from a Furon pump controller module that was never put into service. The photographed sample is representative of the stock on hand. The finish is a semi-gloss black that throws bright highlights along both wings, with a light brassy sheen at the folded edges where the metal was formed. The two side wings are straight and evenly spaced, and the center face carries a round through hole and a small slot. One photo shows a sink of this type in place over a JRC 7805A regulator on the controller board it came out of. That board, the regulator and every other component in that frame are shown for context only and are not part of this sale.
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Product Overview
This is a small clip-on heatsink, sometimes called a radiator clip, made to press over the body of a standard TO-220 package and stay there under its own spring force. Against the PartsMine millimeter ruler the part measures approximately 29 mm across the wings and approximately 20 mm tall. It goes on with your fingers: no mounting screw, no shoulder washer, no thermal compound, no board changes. That makes it the fix you reach for when a 7805, a 7812, an LM317 or a medium-power transistor is running hotter than you want in an enclosure that has no room for a bolt-down sink, or when a board is already built and you would rather add cooling than rework it. A bare TO-220 in still air is commonly reckoned at only a couple of watts before junction temperature becomes the limit, which is the rule of thumb the original listing was written around. Treat that as a starting point and check your device's own datasheet and derating curve. No thermal resistance rating is printed anywhere on this part and none is claimed here.
Key Features
- Fits standard TO-220 packages: clips over the plastic body and metal tab
- Mounting: friction and spring clip, no screws, clips, or thermal paste required
- Size: approximately 29 mm across the wings and 20 mm tall against the ruler
- Construction: folded metal with two side wings and a flat center face
- Center face: one round through hole and one small slot
- Finish: semi-gloss black, no maker's mark legible, with light brassy edge sheen from forming
- Condition: unused new old stock from a controller module never put into service
- Thermal resistance: not confirmed, no rating printed on the part
Applications
- Repair technician who finds a 7805 too hot to touch in a control cabinet and needs cooling added without pulling the board
- Hobbyist building a linear bench supply who wants a regulator to run cooler in a sealed project box
- Maintenance electrician nursing a legacy pump or motor controller along with the same class of part it shipped with
- Prototyper on a breadboard or perfboard who needs a heatsink now and does not want to drill and bolt one down
Frequently Asked Questions
Will this clip fit my TO-220 device?
It is made for the standard TO-220 outline, and the photos show one seated over a JRC 7805A. Package variants exist: full-pack and isolated TO-220 bodies are slightly thicker, and TO-247 or TO-3P parts are a different size entirely. Measure your package body before you order if it is anything other than a plain TO-220.
Do I need a screw, a washer, or thermal paste?
No. The clip holds itself on the package by spring pressure, which is the whole point of the design and why it works on boards that are already assembled. Whether you add a thin film of thermal compound between the tab and the clip is your call; nothing about this part requires it.
How many watts will it dissipate?
Not confirmed. There is no thermal resistance figure printed on the part and we have not measured one, so we will not put a number on it. Size your cooling from your device's datasheet and your own temperature rise measurement rather than from a heatsink spec we cannot verify.
Is the circuit board in the first photo included?
No. That photo exists to show the clip doing its job in place on the module these came out of. What ships is the clip-on heatsink alone, sold each.
Why buy two or three from PartsMine instead of a bag of fifty somewhere else?
Because a heatsink clip is a part you need in ones and twos. If two regulators in one chassis are running hot, you want two clips, not a forced lot of fifty living in a drawer for the next decade. These are sold each, from stock, out of a small unused batch, so you buy the count your repair actually calls for. Shipping is a flat $8, free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
A pump controller that was built and then never switched on is a strange place for a part to stay new, but that is exactly where these came from. Clip one over your regulator and let it finally do the small hot job it was stamped for.
