[GW4FRX]

Originally Posted by Maarten

The BC107 is supposed to be identical to the BC547 except for dissipation. Philips used the exact same die in them once they were both in production. The identical dies should be in at least BC107, BC147, BC237, BC407, BC547, BC847 the only difference being in the case.

Of course, if some manufacturer gives different data on a particular type, that's only appliccable to devices of that particular manufacturer (if it's not an error). Sometimes different manufacturers have different specs, even though that should have been avoided. One possible cause of such differences is the manufacturer in question stamping a roughly equivalent transistor from their existing range. In the early days, differences could have been caused by limitations of the production process or simply by not having the correct data on the competitors device.

Fascinating stuff -- many thanks to all for the enlightenment. It's amazing what you learn on this forum.