All Questions
Tagged with reverse-breakdown or breakdown
50 questions
0 votes
2 answers
50 views
BJT breakdown voltage VCEV vs VCEO and modes of operation
For my application I need to use a FMMT459 (see the attached table). Its breakdown Vce with open base is 450 V, while its VCEV is 500 V. Am I assuming correctly that VCEV is the breakdown voltage with ...
- 31
0 votes
1 answer
110 views
Need for cleaning solder residue for 7mm spacing due to breakdown voltage
I've designed a board that I ordered from JLCPCB. I have traces with 7 mm lowest spacing between them and with voltage of at most 400V AC, 525V peak between them. The traces couldn't be wider due to ...
- 93
0 votes
4 answers
289 views
How do I light an LED on a ground signal when I don't have enough voltage left after the PNP?
I am working with a circuit that grounds when a LED is to turn on. I have an 8V supply voltage for the LED, which cannot exceed 10mA. The signal to turn on the light is a very weak 6.5V, so Vbe is ...
- 2,268
0 votes
1 answer
230 views
Transistor withstand voltage tester
There are some cheap transistor withstand voltage testers around. Aliexpress and eBay are full of them for under $20. I guess the principle is that the tester increases the voltage (with current ...
- 5,586
-1 votes
1 answer
82 views
Reverse Breakdown Voltage for a diode
Could anyone explain why is the reverse breakdown voltage measured for a general diode? Diodes work in the forward biased region. Then why is it important to know the reverse breakdown voltage?
- 27
0 votes
1 answer
79 views
Reverse breakdown voltage over series elements
The M2* FETs are 100 V graded while D_pass is 150 V. Will the FETs' body diodes help them survive a negative 150 V spike?
- 1,158
1 vote
0 answers
182 views
Breakdown voltage of a back-to-back MOSFET configuration (aka "Bidirectional Power Switch")
In a back-to-back MOSFET configuration, if the single MOSFET is maximum-rated at BVDSS=100 V (like the IRF530 in the example), does that mean that the series of both has a breakdown voltage of 200 V ...
- 813
2 votes
1 answer
223 views
Common Source GaN HEMT breakdown
I had recently designed an array of GaN HEMTs to be used as a solid state relay. At low voltages (Vin = 24V) everything was working fine. However, when I bumped up Vin to 70V, after a couple cycles ...
- 23