Absolute maximum ratings of NPN

[ljy4468]

Hi All,

I have a question about absolute maximum ratings of NPN.

Please refer to the attached, and the NPN is open-emitter configuration with base shorted to DC bias, 1.4V.

Then how can I calculate absolute maximum rating of PIN A?

In that case, BV of emitter to sub and BV of C-E related is much higher than BV of B-E related.
So I need only consider BV of B-E related. and since Collector is connected to DC Bias,
the bottle-neck point should be BVEBS.

Am I right?
BVEBS and BVEBO, which one is correct for that?

 

[BradtheRad]

Pin A appears to be a node connected directly to supply +. Is this true?

Going by your schematic, Pin A will assume supply +.

If the bottom wire has a path to ground, current will flow through the rightmost two wires, depending on the resistance.

However no current will flow in the transistor, at any terminal.

There needs to be some resistance between Vcc and Pin A, in order for any action to take place in the transistor.