A better IRFP260

[sourcecharge]

IRFP260

Datasheet: https://www.vishay.com/docs/91215/91215.pdf

200V D-S

40 mohm R[DS(on)]

50A

fully avalanched rated

Does anybody know of a N-channel mosfet that basically is the same but with a higher D-S Voltage breakdown

I want to use to in a ZVS royer induction heater circuit.

thanks

[DC1MC]

FCH041N65EFL4 

https://www.mouser.de/ProductDetail/ON-Semiconductor-Fairchild/FCH041N65EFL4

STW70N60DM2 
https://www.mouser.de/ProductDetail/STMicroelectronics/STW70N60DM2

Cheers,
DC1MC

[wraper]

Go to any big distributor website like Digikey, farnell, mouser and use parametric search in their catalog.

[sourcecharge]

FCH041N65EFL4 

https://www.mouser.de/ProductDetail/ON-Semiconductor-Fairchild/FCH041N65EFL4

STW70N60DM2 
https://www.mouser.de/ProductDetail/STMicroelectronics/STW70N60DM2

Cheers,
DC1MC

Well they both actually have the same perimeters of what I listed but are they really the same as the IRFP260?

The turn off time delay seems longer and the reverse recovery of the diode seems longer too...

The thing is, I did exactly what you did, and I bought these:

IPW60R037P7

https://www.infineon.com/dgdl/Infineon-IPW60R037P7-DS-v02_01-EN.pdf?fileId=5546d46259d9a4bf015a5bb7bab83ca7

And they were like 13 bucks a piece...and they were nothing like the IRFP260 because they couldn't even handle half the voltage spike the IRFP260 could in the ZVS royer circuit..

BTW this is the circuit:

https://ixquick-proxy.com/do/spg/show_picture.pl?l=english&rais=1&oiu=https%3A%2F%2Fmarkobakula.files.wordpress.com%2F2012%2F10%2Froyer_ih.png&sp=80ee3fc570aeeee5b6bd9cf601cf12cb

except instead of the IRFP250 mosfets, I'm using IRFP260

maybe someone might have had the same problem?

[DC1MC]

Were the new mosfets driven correctly ? I really fail to see what's so special about IRFP260 that your replacement and mine shouldn't be able to handle ?!?!?

 Puzzeld,
 DC1MC

[sourcecharge]

Were the new mosfets driven correctly ? I really fail to see what's so special about IRFP260 that your replacement and mine shouldn't be able to handle ?!?!?

 Puzzeld,
 DC1MC

When you say driven correctly, what does that mean?

All I did was drop them directly into where the IRFP260 were in the royer circuit shown in the link above...

Should I have done something extra?

[sourcecharge]

so, I think I'm going to try these next:

What do you guys think?

IRFP4137

https://www.infineon.com/dgdl/irfp4137pbf.pdf?fileId=5546d462533600a401535629208b2002

The point is to have a higher V(ds) so that a higher V input can be used for the heater.

instead of using 2 in parallel, I'm thinking 3 should give the same current capacity and R(ds)on.

[T3sl4co1l]

You're being way too picky for something that 1. isn't a switching application and 2. I'm guessing you have no way of verifying (i.e., an oscilloscope, and the theoretical knowledge to relate that waveform to the circuit layout and device characteristics) whether these alternatives are actually suitable or not.

FWIW, it's not hard to do better than an IRFP260.  They're ancient.  Modern transistors are fully five times improved in all characteristics!  This makes them much more prone to parasitic oscillation.  This circuit characteristically uses linear range operation, briefly but nonetheless.

Tim