Soft as a Feather Pillow (SFP) SSR Soft Start Circuit GB

[1883]

747-IXFP36N60X3

Mouser has IXYS 747-IXFP36N60X3
I see the Vgs th - Gate-Source Threshold Voltage:5 V

The :Infineon Technologies IPP60R022S7XKSA1 Vgs th - Gate-Source Threshold Voltage: 4.5 V

Will this part work?
Thank You

 

[xrk971]

Yes that works. 90mohm is not bad. 600v is good too.

 

[turion64]

Thanks much X!

Pete

These are $3.79 and good for 11 A.

SPP11N60C3XKSA1 Infineon Technologies | Mouser

This has 0.35ohm RDson so will heat up somewhat. Probably will need a small heatsink vs RDson 0.025 ohm ones.

You can search for “TO-220-3 MOSFET low RDson”

I am actually using TO-247 with pins bent to fit TO-220. The key is voltage able to handle mains, so 250v to 450v and low RDson. Also handle the DC current of interest.

 

[nigelwright7557]

My DC protection module.

 

[1883]

Out of focus

What board is this?

 

[turion64]

X: TLP3906E seems to be in short supply as well. Will TLP3905E do as a substitute?

Thanks!

 

[jhofland]

It hasn't been tested so use at your own risk. The differences between the TLP3905 and 3906, as I understand it, is that the 3906 has circuitry for more rapid turnoff. I expect that it will work just fine in this application.

 

[xrk971]

Hi Turion,
Good find there on TLP3905 - I think it should be fine. Looks like 100 or available now and 1000 by December.

 

[turion64]

Thanks J & X! I've got the "06“ on b/o but I have the “05“ in the circuit now. I'll be cautious..

Pete

 

[turion64]

So just to check, for here in the USA, my two transformer primaries would be hooked up as in the picture?

Thanks,

Pete

 

[jhofland]

Yes.

 

[xrk971]

And if you connect one of them reversed (it happens) you will instantly blow a fuse if you have one installed. 🙂

 

[turion64]

And if you connect one of them reversed (it happens) you will instantly blow a fuse if you have one installed. 🙂

That's good to know...

P

 

[as8912]

Hi all,


Had to sand the board ~0.5mm on the side to make it fit within my case; is there a performance/safety risk with the LV ground connected to chassis? Main concern I believe would be noise from the toroid coupling to the LV gnd?



I'm planning on adding electrical tape to cover the LV ground, but wanted to confirm for other contact points (bolts, etc)

 

[gtose]

Xrk, great looking board as usual. What are the dimensions of the pcb?

 

[turion64]

Xrk, great looking board as usual. What are the dimensions of the pcb?

The diagram I have says 84x88mm

Merry Christmas all,
Pete

 

[randytsuch]

Anyone have a substitute for the LM2903 comparator?
Not in stock at Mouser or Digikey.

Thanks
Randy

 

[xrk971]

I should have sent some of those along with the TLP’s that went out yesterday.

 

[randytsuch]

I should have sent some of those along with the TLP’s that went out yesterday.

My bad, I didn't try adding these parts to Mouser until today.
I'll look for an alternate

Randy

 

[pinkfloyd4ever]

https://octopart.com/search?q=LM2903P&currency=USD&specs=0
Looks like LCSC (whatever that is) has them in stock with 1pc min order qty. It says TI does too, but I'm not sure if I believe that TI will sell you 1pc direct. Worth checking though