How to chose proper mosfet for the SSR?
What is important is Vds, Drain current and Rdson.
But what about body diode current characteristic?
SSR is working with AC voltage because of mosfet intrinsic body diode, but it's not easy to find much about it in a mosfets datasheets.
Attached the plot of the mosfet I used (TK72E12N1), not sure if it's good enough?
What is important is Vds, Drain current and Rdson.
But what about body diode current characteristic?
SSR is working with AC voltage because of mosfet intrinsic body diode, but it's not easy to find much about it in a mosfets datasheets.
Attached the plot of the mosfet I used (TK72E12N1), not sure if it's good enough?
Attachments
You have a good question Dadod, however I don’t have the knowledgde to give a decent answer. I’m using the irfp4568 in my SSR, diode characteristics are comparable to yours.
I prefer to247/to264 above to220:
1. Legs have a higher cross surface
2. Leg distance is bigger, which means wider pcb tracks.
I prefer to247/to264 above to220:
1. Legs have a higher cross surface
2. Leg distance is bigger, which means wider pcb tracks.
Hi Bensen,
I have layout ready for to247/to264 too.
I am not sure the MOSFET you choose is best choice regarding body diode.
Look the Fig 7. Typical Source-Drain Diode Forward Voltage
Sorry I noticed now that this plot is for Vgs zero, so again no information.
This part of mosfet is new for me and hard to find information. Does Rdson is valid for body diode too??
BR Damir
I have layout ready for to247/to264 too.
I am not sure the MOSFET you choose is best choice regarding body diode.
Look the Fig 7. Typical Source-Drain Diode Forward Voltage
Sorry I noticed now that this plot is for Vgs zero, so again no information.
This part of mosfet is new for me and hard to find information. Does Rdson is valid for body diode too??
BR Damir
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