hi,
transistor data sheet has two types of maximum power dissipation data like below for bc546 d onsemi transistor kindly see attachment
Total Device Dissipation @ TA = 25°C
Derate above 25°C
PD 625
5.0
mW
mW/°C
Total Device Dissipation @ TC = 25°C
Derate above 25°C
PD 1.5
12
W
mW/°C
both units are PD and derate above 25 degree . quiet confusing
. what is the difference between these two ? 
transistor data sheet has two types of maximum power dissipation data like below for bc546 d onsemi transistor kindly see attachment
Total Device Dissipation @ TA = 25°C
Derate above 25°C
PD 625
5.0
mW
mW/°C
Total Device Dissipation @ TC = 25°C
Derate above 25°C
PD 1.5
12
W
mW/°C
both units are PD and derate above 25 degree . quiet confusing
. what is the difference between these two ? 
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.