Joe McElvenney wrote in message
...
Hi,

Strapped directly across the b-e junction of a TIPL755A bipolar in a
SMPS out of a HP54502A scope is the following -

Body - cylindrical, black plastic, 5/8" long by 1/4" dia.

Body markings - MCS MTS 90A.

Leads - two, axial.

PCB marking - S1.

Polarity markings - nil.

Condition - s/c.

Naturally I don't have a schematic but my guess is that it's some sort
of over-voltage clamp. A great deal of googling hasn't helped me so
any info would be much appreciated.


Happy Holidays - Joe


inductor ?