Replacement for Motorola MPS-U10?

jamesdean · 09:34 AM

Hey everyone,

I'm repairing a Bose 1800 series amplifier and am looking to source a replacement for this transistor.

its a Motorola MPS-U10. Bose used it due to RCA discontinuing the 2N6175 back in the day.

I was hoping someone here could recommend me a replacement.

I was looking at mouser and here's what I found thats comparable:

2SC4793 (Seems ideal)
http://www.mouser.com/ProductDetail/...Vz8fc6GA%3d%3d

2N5655 (Maybe a bit slow?)
http://www.onsemi.com/pub_link/Collateral/2N5655-D.PDF

2STC5949 (Maybe excessive?)
http://www.st.com/internet/com/TECHN...CD00171942.pdf

BU406 (Also a bit slow?)
BU406 Fairchild Semiconductor Bipolar Power

The pin out on the U10 is EBC, I dont think any of the ones I found are in the same pattern. The U10 attaches to the main heatsink.

Thanks!

jaycee · 10th December 2011, 01:40 PM

Is it the Q3 transistor ? This is a VAS cascode device. I'd say an MJE340 would work well there. You're unlikely to find anything with EBC layout (other than TO-92 package devices) so you will have to do a bit of lead bending to make it fit.

jamesdean · 02:16 PM

Yes this is Q3. I figured I'd be stuck having to bend leads around. Probably will have to find something to extend them as well.

What were your thoughts on the 2SC4793? I came across the MJE340 in an earlier search. Should have mentioned it as well. I was leaning towards the 4793 because of the higher collector current and high Ft. Most of the others were well below the U10. Originally I dismissed the 4793 because it was only 2W however I opened the datasheet and w/ heatsink it can handle 20W.

They dont seem to mention the MJE's Ft in the datasheet.

audiohead · 10th December 2011, 07:58 PM

I think I have some MPS-U10, How many do you need?

I look for them, if I manage to find them I can send it to you for free.

Please email me your address.

Art

audiohead · 12th December 2011, 06:03 PM

Hi Kris:

I managed to find the MPS-U10s, please email me your address.

Art

mmgoode · 10th February 2012, 06:23 PM

Quote:

Originally Posted by audiohead

I think I have some MPS-U10, How many do you need?

I look for them, if I manage to find them I can send it to you for free.

Please email me your address.

Art

Hello Audiohead. Do you have any more of those MPSU10 transistors? I need a pair to fix the horizontal deflection circuit in a Heathkit AD-1013 Audio 'scope.

N9NS@ARRL.net

Thanks,
Mike in Indy

10th December 2011, 09:32 AM	#1
jamesdean diyAudio Member Join Date: Sep 2010	Replacement for Motorola MPS-U10? Hey everyone, I'm repairing a Bose 1800 series amplifier and am looking to source a replacement for this transistor. its a Motorola MPS-U10. Bose used it due to RCA discontinuing the 2N6175 back in the day. I was hoping someone here could recommend me a replacement. I was looking at mouser and here's what I found thats comparable: 2SC4793 (Seems ideal) http://www.mouser.com/ProductDetail/...Vz8fc6GA%3d%3d 2N5655 (Maybe a bit slow?) http://www.onsemi.com/pub_link/Collateral/2N5655-D.PDF 2STC5949 (Maybe excessive?) http://www.st.com/internet/com/TECHN...CD00171942.pdf BU406 (Also a bit slow?) BU406 Fairchild Semiconductor Bipolar Power The pin out on the U10 is EBC, I dont think any of the ones I found are in the same pattern. The U10 attaches to the main heatsink. Thanks! Last edited by jamesdean; 10th December 2011 at 09:34 AM.

10th December 2011, 02:10 PM	#3
jamesdean diyAudio Member Join Date: Sep 2010	Yes this is Q3. I figured I'd be stuck having to bend leads around. Probably will have to find something to extend them as well. What were your thoughts on the 2SC4793? I came across the MJE340 in an earlier search. Should have mentioned it as well. I was leaning towards the 4793 because of the higher collector current and high Ft. Most of the others were well below the U10. Originally I dismissed the 4793 because it was only 2W however I opened the datasheet and w/ heatsink it can handle 20W. They dont seem to mention the MJE's Ft in the datasheet. Last edited by jamesdean; 10th December 2011 at 02:16 PM.

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10th December 2011, 01:40 PM	#2
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Is it the Q3 transistor ? This is a VAS cascode device. I'd say an MJE340 would work well there. You're unlikely to find anything with EBC layout (other than TO-92 package devices) so you will have to do a bit of lead bending to make it fit.

10th December 2011, 07:58 PM	#4
audiohead diyAudio Member Join Date: Mar 2005 Location: Los Angeles, california	I think I have some MPS-U10, How many do you need? I look for them, if I manage to find them I can send it to you for free. Please email me your address. Art

12th December 2011, 06:03 PM	#5
audiohead diyAudio Member Join Date: Mar 2005 Location: Los Angeles, california	Hi Kris: I managed to find the MPS-U10s, please email me your address. Art

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