All, I just got confirmation from the engineer who created the drawing that that symbol is indeed a heatsink. Thanks all for your responses.
Doug Nix [email protected] (519) 729-5704 "Attachment is a form of dependency based on ego; love is non-attachment based on spirit." - Deepak Chopra > On Mar 3, 2023, at 03:05, James Pawson (U3C) <[email protected]> > wrote: > > I would agree with Dan, looks like a notation for a heatsink. > > The pinout looks like a surface mount MOSFET so I would guess the meaning as > “requires heatsinking / thermal spreading as part of PCB structure” > > If part of a DC/DC converter or power supply this is a good way to connect a > high dV/dt node to one plate of a capacitor! Welcome to the wonderful world > of engineering compromise – EMC or thermal performance? > > All the best > James > > James Pawson > Managing Director & EMC Problem Solver > > Office hours: > My mornings are reserved for full attention on consultancy, testing, and > troubleshooting activities for our customers’ projects. I am otherwise > contactable between 1300h to 1730h from Monday to Friday. > For inquiries, bookings, and testing updates please send us an email on > [email protected] <mailto:[email protected]> or call > 01274 911747. Our lead times for testing and consultancy are typically 4-5 > weeks. > > Unit 3 Compliance Ltd > EMC : Environmental & Vibration : Electrical Safety : CE & UKCA : Consultancy > > www.unit3compliance.co.uk <http://www.unit3compliance.co.uk/> | > [email protected] <mailto:[email protected]> > +44(0)1274 911747 | +44(0)7811 139957 > 2 Wellington Business Park, New Lane, Bradford, BD4 8AL > Registered in England and Wales # 10574298 > > From: Dan Roman <[email protected]> > Sent: 02 March 2023 22:28 > To: [email protected] > Subject: Re: [PSES] Can anyone tell me what this symbol means? > > Maybe that the heatsink is connected to the drain? > > Dan > > > From: Doug Nix [mailto:[email protected]] > Sent: Thursday, March 2, 2023 4:53 PM > To: [email protected] <mailto:[email protected]> > Subject: [PSES] Can anyone tell me what this symbol means? > > Colleagues, > > I came across the eyelash-like symbol above the MOSFET in the image below, > and I am at a loss for what it represents. My searches of schematic symbol > databases has come up dry as well. Anyone know what this means? >  > > Doug Nix > [email protected] <mailto:[email protected]> > +1 (519) 729-5704 > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. 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