MICROELECTRONICS. 2N/91/ 2N/94/ COMPLEMENTARY SILICON POWER TRANSISTORS. 2N, 2N, 2N AND 2N ARE . Characteristics of the 2N bipolar transistor. Type – p-n-p; Collector-Emitter Voltage: 40 V; Collector-Base Voltage: 40 V; Emitter-Base Voltage: 5 V. Manufacturer Part No: 2N Order Code: Technical Datasheet: 2N Datasheet. Availability: No Longer Manufactured. See all Technical Docs.

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Substituting a 2NG for the B hasn’t made any difference. Are you sure you wish datwsheet delete this message from the message archives of TekScopes groups. Will check my box of scraps.

Presume there’s guidance on the site somewhere – will try some more searching. I hope that will shed some more light. I have plenty of photos and waveforms from diagnostics so far but I’m not sure how to upload them or link them to this post. The Group moderators are responsible for maintaining their community and can address these issues. Your email is included with the abuse report.

Silicon PNP Power Transistors

One of the LeCroy shots has parameters overlaid showing min and max voltages reached – as does the single Rigol shot taken simultaneously. The soldering does not look original.

I’ve started to datsheet how the -9V and -5V supplies are behaving as the first appears to be working fine and the second is not and they’re not very dissimilar subcircuits and use the same op-amp.


I’ll bet the B in B is an 8 and if so is a date code. At present, I’m just looking for advice on whether this part of the supply is particularly sensitive to the characteristics of Q, details of what the full identifier for the Motorola B might be and where I might find a datasheet, and advice as to whether the 2NG is a suitable replacement and, if not, what to use instead.

Use a mica washer when mounting on a metal surface. And closer inspection shows you’re right that it’s not B The photo titles show the channel allocations to the rails. Biggest challenge is finding enough time to do the n25193.

This cannot be undone. I’ll presume for now the 2N is working OK and move on. There’s also one expanded timebase shot from the LeCroy showing the U op-amp output into the base of Q and its correspondence with movements on the -5V rail, which starts its downward trajectory but is derailed by the positive shift at Q base and doesn’t recover.

On Mon, Oct 8, at Hopefully this will help with interpretation of my earlier adtasheet. My eyes are not what they used to be.

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Tek – does anyone recognise these power supply transistor markings?

As far as I can tell U and Q are behaving as expected but I can find no bad passives on the -5V supply sub-circuit. Subject of the new topic: The new topic will begin with this message. Hardware shot simply shows the Motorola circled red. Seems that’s datasheeet way it should be. I’ve been unable to find any datasheet on this item and don’t know whether it’s original or a substitute from an earlier rework.

Reed Dickinson toggle quoted message. Datasheeet can post some annotated scans of the relevant schematic parts if that would help. Also can anyone make use of some fast switching diodes and other parts? Reason Report to Moderators I think this message isn’t appropriate for our Group.

(Datasheet) 2N pdf – (2Nx) Complementary Silicon Power Transistors (1-page)

In this case the device is connected to a large pad on the Q’s Tek part number for my ‘s serial number isfor which Sphere lists 2N as a substitute. If you had a spare lying around it would be good to have one available. So the problem seems to lie on the datawheet supply board.