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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2N5193 Datasheet PDF

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 Biggest challenge is finding enough time to do the diagnostics.

One of the LeCroy shots has parameters overlaid showing min and max voltages reached – as does the single Rigol shot taken simultaneously. 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.

If you had a spare lying around it would be good to have one available. Presume there’s guidance on datasgeet site somewhere – will try some more searching.


(Datasheet) 2N pdf – (2N / 2N) 2 Ampere Power Transistors Silicon PNP (1-page)

The photo titles show the channel allocations to the rails. And closer inspection shows you’re right that it’s not B Hardware shot simply shows the Motorola datashet red.

Search Only Within This Topic. 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. Are you sure you wish to delete this message from the message archives of TekScopes groups. Dataseet been unable to find any datasheet on this item and don’t know whether it’s original or a substitute from an earlier rework.

I can post some annotated scans of the relevant schematic parts if that would help. I hope that will shed some more light. Your email is included with the abuse report. In this case the device is connected to a large pad on the The soldering does not look original.

2N Datasheet(PDF) – Savantic, Inc.

Reed Dickinson toggle quoted message. Hopefully this will help with interpretation of my earlier msg.

I’ll presume for now the 2N is working OK and move on. So the problem seems to lie on the power supply board. Use a mica washer when mounting on a metal surface.

Also can anyone make use of some fast switching diodes and other parts? Subject of the new topic: 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, dattasheet not, what to use instead.


I’ve started to compare 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. The new topic will begin with this message.

Will check my box of scraps. Seems that’s the way it should be. My eyes are not what they used to be. This cannot be undone.

2N5193 Datasheet, Equivalent, Cross Reference Search

Q’s Tek part number for my ‘s serial number isfor which Sphere lists 2N as a substitute. Substituting a 2NG for the B hasn’t made any difference. I’ll bet the B in B is an 8 and if so is a date code. The Group moderators are responsible for maintaining their community and can address these issues.