What is the difference between an SL100 transistor and a BC107 transistor?

10 Differences between SL100 and BC107

BC107

BC107 in that BC stand for Buried Channel 107 is the product version that indicate the how much of matierial and types of material used for manufacture.

SL100 

SL100 is a general purpose, medium power NPN transistor. It is mostly used as switch in common emitter configuration. The transistor terminals require a fixed DC voltage to operate in the desired region of its characteristic curves. This is known as the biasing.

10 Differences between SL100 and BC107

specifications	BC107	SL100
Polarity	NPN Transistor	PNP Transistor
No. of pins	3	3
Package	To-18	To-39
Collector-Emitter Voltage	45v	50v
LEAD CODE:	1) Emitter 2) Base 3) Collector	1) Emitter 2) Base 3) Collector
Total power dissipation	600mw	800mw
Gain	<30dB	<100dB
hfe	125-500	100-300
Operating & Storage Junction Capacitance	-65 to 200°C	-65 to 200°C
Application	Power amplifier, Switch	General  purpose Power amplifier,Switch