Optimal fan configuration for TO-220 heatsink (RA‑T2X‑64E) with …
Jul 30, 2025 · Hello, I’m working on a power electronics project using a single TO-220 MOSFET mounted on a RA‑T2X‑64E extruded heatsink (cylindrical shape with vertical radial fins). I’m …
Mosfet Heat Calc - All About Circuits
Nov 12, 2023 · ChatGPT tells me: To calculate the heat dissipation of a MOSFET without a heatsink, you can use the following steps: Calculate the RDS (on) resistance from the drop in …
On top of SMD package IC or bottom of PCB - All About Circuits
Nov 17, 2024 · I have a circuit board with several MOSFETs in TO252 and TO263 packages as well as other IC with exposed pad on the bottom. I need to cool these parts and have 2 …
Heat Sinks - All About Circuits
May 8, 2024 · I was wondering about the heat sinks that we usually put on the devices that dissipate more heat. Aluminum heat sink are very common. But if we look at the thermal …
Connecting LM7805's ground to headsink instead of pin 2?
May 27, 2010 · It works, but if and only if the heatsink is firmly connected to circuit ground, and the connection between the heatsink and the TO-220 tab is well made with star washers. The …
how do they rate heat sinks ... what is better? - All About Circuits
Nov 18, 2023 · The problem becomes hard when the heatsink rating is for heat transfer in moving air and the application condition is still air. Years ago one manufacturer posted a table of …
How to mount heat sink to mosfet - All About Circuits
Jul 3, 2019 · I don't think nylon screws for attaching to a heatsink would be a good idea. You need to be able to apply plenty of pressure between the component and the heatsink which you …
Is it normal for my heat sink to be a lot cooler than my transistor ...
Jul 9, 2024 · The transistor package is TO-247. Based on what I've learned from Ya'akov's post, your suggestion seems to be spot on. Before reading his post, I didn't realize that the main …
MOSFET power dissipation. Can a heatsink take +300W?
Nov 14, 2022 · First of all, take the semiconductor device under consideration and figure the thermal resistance from the junction to the case (usually given in data sheets). Next, figure in a …
LM7805 overheating - All About Circuits
Feb 26, 2013 · You are dropping 4V between input and output, and at 0.5A that makes 2W, and that is a LOT of heat without a heatsink. The fairchild datasheet says that the thermal …