Hello,
When transistor is used as a switch what parameters I should look to find suitable replacement?
I need to find out is S8050 suitable replacement for BC547.
Kind regards.
Hello,
When transistor is used as a switch what parameters I should look to find suitable replacement?
I need to find out is S8050 suitable replacement for BC547.
Kind regards.
Collector-Base Voltage
BC547/550 50
Collector-Emitter Voltage
BC547/550 45
Emitter-Base Voltage
BC546/547 5
Collector Current (DC)
100 mA
Collector Power Dissipation
500 mW
DC Current Gain
VCE=5V, IC=2mA 110-800
http://media.nkcelectronics.com/datasheet/s8050.pdf
Collector-Base Voltage V
30
Collector-Emitter Voltage
20
Emitter-Base Voltage
5
Collector Dissipation(Ta=25°)
1 W
Collector Current
Ic 700 mA
DC Current Gain(note)
hFE 110-400
The BC547 is categorized as "designed for use as general purpose amplifiers and switches requiring collector currents to 300 mA."
The S8050 is categorized as "a low voltage high current small signal NPN transistor, designed for Class B push-pull audio amplifier and general purpose applications."
Hello,
I looked at the datasheets of both transistors, and almost right away I noticed the "large" difference of the max voltages. Since I don't know in what kind of circuitry you want to use the S8050, more particularly what the max voltages are, I can't determine if you can use S8050. Are you from Europe? The BC547 was a very popular transistor used in European magazines, especially in Belgium and the Netherlands.
Here are some images taken from the datasheets.
I hope this helps you.
Mike
Darn, I can't post the images in the text, had to include them as attachments, sorry
botzko:
Hello,When transistor is used as a switch what parameters I should look to find suitable replacement?
I need to find out is S8050 suitable replacement for BC547.Kind regards.
For a switch the saturation characteristics (including turn off time), leakage current, and max voltage are the main parameters you care about.
Thank you all.
@Mikeb1970 the voltage is 12V, so this should be fine because both transistor support higher voltage.
@MarkT - may be stupid question but what are the saturation characteristics for the transistor? Also I'm checking
https://www.sparkfun.com/datasheets/Components/BC546.pdf and
http://media.nkcelectronics.com/datasheet/s8050.pdf
but can not find the turn off time.
At 12 volt there are no problems indeed on this part.
I'm sure I have a BC547 here, the biggest problem is were is it located.
Anyway, would it help you out if I could send it to you?