Different MOSFET for RAMPS

Chris Martin

Different MOSFET for RAMPS
May 01, 2011 06:07PM

Registered: 14 years ago
Posts: 16

Can someone with more electronics knowledge than me recommend a different MOSFET for the RAMPS board? It looks like the STP55NF06L is completely out of stock from Digikey.

[search.digikey.com]〈=en&WT.z_cat_cid=Dxn_US_US2011_Catlink&name=497-6742-5-ND

Anyone who can recommend a product that will perform the same will be greatly appreciated.

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jcabrer

Re: Different MOSFET for RAMPS
May 01, 2011 07:52PM

Registered: 18 years ago
Posts: 824

[ultimachine.com]

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Chris Martin

Re: Different MOSFET for RAMPS
May 01, 2011 10:00PM

Registered: 14 years ago
Posts: 16

Yea, I know where to get the exact one from a few places. I am looking for a comparable one that Digikey specifically keeps in stock.

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Sublime

Re: Different MOSFET for RAMPS
May 02, 2011 11:17PM

Registered: 14 years ago
Posts: 2,947

If you looked through the rest of the ramps forum you would see this MTP30N06 mosfet instead of STP55NF06 as the title to this thread [forums.reprap.org]

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Chris Martin

Re: Different MOSFET for RAMPS
May 03, 2011 10:16PM

Registered: 14 years ago
Posts: 16

Saw that, not quite what I am looking for. As you obviously noticed, the posted mentioned that the MTP30N06 he asked about is obsolete at the time of posting. I am looking for a current model or at least the specs that are important.

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brupje

Re: Different MOSFET for RAMPS
May 04, 2011 03:07AM

Registered: 15 years ago
Posts: 384

any TO-220 N-type MOSFET rated for >=60v and >=50A should do.

Look like the STP55NF06 is in stock though, just not de L version.
[search.digikey.com]

Edited 1 time(s). Last edit at 05/04/2011 03:11AM by brupje.

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Chris Martin

Re: Different MOSFET for RAMPS
May 04, 2011 07:14PM

Registered: 14 years ago
Posts: 16

Awesome. Thanks. I am not electronics savvy enough to know if that mattered.

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Sublime

Re: Different MOSFET for RAMPS
May 04, 2011 07:25PM

Registered: 14 years ago
Posts: 2,947

I'm not sure that is correct. I believe I have read a thread somewhere mentioning not all transistors are capable of running at the frequencies required for PID. A tip120 I believe is only good for bang/bang control. You may want to start a thread in the general electronics forum to confirm.

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Triffid_Hunter

Re: Different MOSFET for RAMPS
May 08, 2011 11:04PM

Registered: 18 years ago
Posts: 1,094

IRL3803 is my favourite. seems perfectly happy being driven at 62.5KHz PWM direct from my avr's output, and can carry about 15A with no heatsink

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brupje

Re: Different MOSFET for RAMPS
May 09, 2011 05:01AM

Registered: 15 years ago
Posts: 384

I don't think it is a good idea to draw 15A over the ramps board though.

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VDX

Re: Different MOSFET for RAMPS
May 09, 2011 05:35AM

Admin
Registered: 18 years ago
Posts: 14,148

... it's no real issue, when the tracks are wide enough - i have a high-power LED-driver that can output until 100 Watts (or more than 20 Ampere's: [www.linear.com] ) with 4 small SMD-MOSFETS without coolers winking smiley

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