8
\$\begingroup\$

I believe this to be a voltage regulator of some kind (it's failed, and is resulting in a dead short straight through). However neither I nor Google Image Search is having any luck identifying the manufacturer mark. Does this look at all familiar to anyone?

(If anyone knows what the component is, that'd be even more awesome, but at least with the manufacturer I can look it up in their catalogue. Google doesn't know what a EDJ3207 is either, by the way.)

enter image description here

\$\endgroup\$
1
  • \$\begingroup\$ Most parts will have both a part number and a date code marking. While formats vary, the most common date-codes include the week within the year and the last two digits of the year, usually written as wwyy. The date code is most commonly below or after the part number. With this information in mind, the markings on that chip can separated into the "B45P03" most likely being the part number and the "EDJ3207" containing a date-code indicating that it was manufactured in the 32nd week of 2007. That this interpretation is correct can be verified in the datasheet which you have already obtained. \$\endgroup\$
    – Makyen
    Commented Jun 26, 2021 at 20:25

2 Answers 2

Reset to default
16
\$\begingroup\$

While I was writing up the post someone looked over my metaphorical shoulder and said 'oh, yes, that's an Excelliance P-channel MOSFET, probably the EMB45P03' and handed me the datasheet. Sigh.

https://datasheetspdf.com/pdf/1111730/ExcellianceMOS/EMB45P03A/1

\$\endgroup\$
4
  • \$\begingroup\$ It looks good except the data sheet shows only 4 pins. \$\endgroup\$
    – Barry
    Commented Jun 25, 2021 at 12:48
  • \$\begingroup\$ The copy they gave me was privately shared and I can't attach it --- I thought I'd found a third-party copy of the same one, but it seems I picked the wrong package. \$\endgroup\$
    – David Given
    Commented Jun 25, 2021 at 12:59
  • 4
    \$\begingroup\$ You can (and should) except your answer as correct or this question will keep recirculating via Community. \$\endgroup\$
    – StainlessSteelRat
    Commented Jun 25, 2021 at 15:53
  • 1
    \$\begingroup\$ @StainlessSteelRat Yes, in two days. \$\endgroup\$
    – David Given
    Commented Jun 25, 2021 at 19:46
11
\$\begingroup\$

Excelliance EMB45P03G is the correct part number:

enter image description here

A 30V 5A logic-level P-channel MOSFET.

\$\endgroup\$
5
  • 1
    \$\begingroup\$ With this answer, you might really want to explain how you found it so later readers can piggy back on your knowledge. Thanks in advance. \$\endgroup\$
    – kaiser
    Commented Jun 25, 2021 at 21:41
  • 1
    \$\begingroup\$ @kaiser I'm afraid I don't have a magic formula, I used manufacturer and the partial part number the OP had and found the actual manufacturer's website and eventually located the datasheet. Maybe OP wants to to just edit the info into his answer and let that be the whole thing? \$\endgroup\$
    – Spehro 'speff' Pefhany
    Commented Jun 25, 2021 at 21:42
  • 3
    \$\begingroup\$ @kaiser It's the top search result for 'b45p03' for me, so not that hard to find. Google is magic! \$\endgroup\$
    – Bruce Abbott
    Commented Jun 26, 2021 at 10:12
  • 1
    \$\begingroup\$ @kaiser Google-fu involves training your personal google-instance over many years. Such training cannot be conveyed in a mere slip of a comment. \$\endgroup\$
    – Andrew Morton
    Commented Jun 26, 2021 at 20:46
  • 1
    \$\begingroup\$ I wonder why the OP didn't find the part if it was that obvious and search result number one for that device name... \$\endgroup\$
    – kaiser
    Commented Jun 28, 2021 at 15:27

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.