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 aiming …
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 voltage across …
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 conductivity of …
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 options: 1. Glue 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 resistance junction …
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 goal of thermal …
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 small amount …
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 can't do with a …
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 possibility …
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 "watts of heat" …