Need help identifying component - Page 1
Forum section: electronics / repair

author: keystone
author_rank: Contributor
timestamp: September 26, 2025, 05:57:13 am
content: I have a Cellular Products Distributors solid state regulated 12 volt power supply rated at 3A continuous, 5A surge. Can anyone help me identify this part? Thank you for looking. Greg

author: WattsThat
author_rank: Frequent Contributor
timestamp: September 26, 2025, 06:07:10 am
content: Seriously doubt it it’s a 3 amp supply with what appears to be 1 amp diodes and a tiny filter cap.IMO Looks like a possible candidate for a 7812 regulator. Hook it up to a bench supply and figure out the current requirements as the existing supply couldn’t hack the the load, that there was thermal overload of the component, most likely a simple linear pass regulator transistor.

author: Uunoctium
author_rank: Frequent Contributor
timestamp: September 26, 2025, 07:24:21 am
content: The stylized "M" could be the logo for Matsushita Electric Industrial Co., Ltd and below probably:2SB9…

author: floobydust
author_rank: Super Contributor
timestamp: September 26, 2025, 09:15:46 am
content: I thought I saw top of a four i.e. B94x in the pic? Not a one, no luck for B91x.That gives hits for 2SB940, 2SB943 but they are high voltage.The 2SB950 or 2SB951 they're Darlingtons and look closer to what is needed.I looked for 2SB9xx in the isolated fullpak TO-220 by Matsushita atthis site.seems to called "TO220-2".

author: coromonadalix
author_rank: Super Contributor
timestamp: September 26, 2025, 05:47:58 pm
content: you have 1n5xxx diodes could be a 1n5404 normally they are in the 3 amp rangefor the circuit its a matter of knowing the base emitter and collector tou can deduce if it is an npn or a pnp or darlingtoni really doubt it can even hold 5a peak / surges

author: fzabkar
author_rank: Super Contributor
timestamp: September 26, 2025, 05:56:32 pm
content: Quote from: floobydust on September 26, 2025, 09:15:46 amCode:2SB921 Si pnp 40W 120V - 4V 7A 175>C 10MHz - 90/220 MAT TO220-1 Power General Purpose - 2N6047 KT818G 2SA6632SB925A Si pnp 30W 50V 50V 4V 7A 175>C 75MHz - 120T MAT TO220-1 Power General Purpose - 2N6314 KT837V2SB949 Si pnp 35W 60V 45V 3V 2A 175>C - - 2000T MAT TO220-2 Darlington Power BD716 2N6297 KT709A22SB949A Si pnp 35W 80V 60V 3V 2A 175>C - - 2000T MAT TO220-2 Darlington Power BD718 2N6297 KT709A22SB950 Si pnp 40W 60V 45V 3V 4A 175>C - - 2000T MAT TO220-2 Darlington Power BD716 2N6297 KT709A22SB950A Si pnp 40W 80V 60V 3V 4A 175>C - - 2000T MAT TO220-2 Darlington Power BD718 2N6297 KT709A22SB951 Si pnp 45W 60V 45V 3V 8A 175>C - - 2000T MAT TO220-2 Darlington Power BD646 2N6297 KT709A22SB951A Si pnp 45W 80V 60V 3V 8A 175>C - - 2000T MAT TO220-2 Darlington Power BD650 2N6297 KT709A22SB988 Si pnp 30W 60V 60V 5V 3A 175>C 5MHz - 140T MAT TO220-1 Power General Purpose BD242A 2N6314 KT837V2SB991 Si pnp 20W 180V 180V 5V 1.5A 175>C 4MHz - 140T MAT TO220-1 Power General Purpose BD240E 2N6422 KT842A

author: fzabkar
author_rank: Super Contributor
timestamp: September 26, 2025, 06:50:27 pm
content: https://www.forabodiesonly.com/mopar/threads/power-supply-help.576421/2SB948https://pdf.dzsc.com/B94/2SB948.pdf

author: coromonadalix
author_rank: Super Contributor
timestamp: September 26, 2025, 08:25:20 pm
content: good findBTW it is an 0.15 ohms not 15 ohms loll see the zero and dot ..

author: keystone
author_rank: Contributor
timestamp: September 27, 2025, 08:14:43 am
content: That sure looks like it! Thank you for finding that. Much appreciated.Greg

author: keystone
author_rank: Contributor
timestamp: September 27, 2025, 08:16:22 am
content: Thank you all for responding and helping identify this IC. You guys are great!