IRFP transistors

AuroraB · 13th February 2002, 10:30 AM

While searching for suppliers of IRFP 240/9240 transistors, one of them came up with a type number IRFP9240-R4941, instead of the standard number....
Is this just a bad stock no. - with lot code..??
Anyone who has a clue what this means,- or if it has any significance at all..??

Searching in all directions just gives me the standard part data........

AuroraB · 13th February 2002, 11:02 AM

Just to add.. production date codes usually looks different.

It seems like a lot of people are looking for these parts nowadays, so this might have some general interest.

ergo · 13th February 2002, 11:56 AM

www.freetradezone.com gives these results

IRF240 - TO3 metal case transistors (Semelab and General electric)

IRFP240 - TO247 or TO3P (Fairchild and National respectively)

Ergo

Musher · 13th February 2002, 11:18 PM

Fairchild has some versions of IRFP240/9240 that end with A or B as far as I remember. _R4941 is an extension to the order code that means the industry standard model with known original spesifications is in question.

-Kimmo S.

BTW. are TO-247 and TO3P really the one and the same?

vpharris · 14th February 2002, 03:24 PM

No; the TO247 is kind of a variation on the TO220 and the TO3 is the old style of large power package- sort of diamond-shaped with a flange and two mounting holes. I think you can get the details at International Rectifier's website (and probably many others). Most manufacturers post the 'mechanical specifications' which are the package dimension drawings.

Having been away from electronic design for some years, I wasn't familiar with the TO247 myself, but I found my way to info about it somewhere, I think at the IR page.

Musher · 14th February 2002, 05:44 PM

I have a catalog (Finnish Suomen huoltopalvelu Oy) on my lap, and it has some mica washers for sale. TO-220 is just like we all know it. So is TO-3. But there is one that is square-shaped, a little bigger (wider) than TO-220 and it has three codes for it: SOT-93, TO-3P and ISO-218. Fischer's catalog had same dimensions for something it calls TO-218 and TO-247. So after a little research it seems that after all TO-3P (not a misspelled TO-3) and TO-247 are the same. Though I'm a bit lost why the SHP catalog has also TOP-3, a 17.5x20.5mm square with top corners cut, i.e. rectangle like a half hexagon added to it.

TO3P = flat 20x26mm body (Magnatec)
TO247 = flat 15x20mm body (Magnatec)
TO 3 PF = 20x24mm square (Fischer's catalog)
TO 247/1 = 21x24mm square (Fischer's catalog)
In SHP catalog all are out of scale and not detailed anywhere

13th February 2002, 10:30 AM	#1
AuroraB diyAudio Member Join Date: May 2001 Location: Norway, -north of the moral circle..	IRFP transistors While searching for suppliers of IRFP 240/9240 transistors, one of them came up with a type number IRFP9240-R4941, instead of the standard number.... Is this just a bad stock no. - with lot code..?? Anyone who has a clue what this means,- or if it has any significance at all..?? Searching in all directions just gives me the standard part data........

14th February 2002, 03:24 PM	#5
vpharris diyAudio Member Join Date: Dec 2001 Location: Philadelphia	No; the TO247 is kind of a variation on the TO220 and the TO3 is the old style of large power package- sort of diamond-shaped with a flange and two mounting holes. I think you can get the details at International Rectifier's website (and probably many others). Most manufacturers post the 'mechanical specifications' which are the package dimension drawings. Having been away from electronic design for some years, I wasn't familiar with the TO247 myself, but I found my way to info about it somewhere, I think at the IR page. __________________ Vince Harris

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
IRFP 240 for sale	dhole	Swap Meet	8	20th July 2005 01:24 PM
Yor Opinion on this MOS-Amp (+-80V IRFP[9]240)	tab30	Solid State	7	1st December 2003 12:27 PM
Irfp 240 !!!!!!!!!!	jeclk	Pass Labs	5	11th November 2003 05:00 PM
IRFP Transistors-calling Scandinavia	AuroraB	Parts	9	13th March 2003 06:17 PM
Fairchild IRFP	NHul	Pass Labs	0	16th February 2002 09:12 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

13th February 2002, 11:02 AM	#2
AuroraB diyAudio Member Join Date: May 2001 Location: Norway, -north of the moral circle..	Just to add.. production date codes usually looks different. It seems like a lot of people are looking for these parts nowadays, so this might have some general interest.

13th February 2002, 11:56 AM	#3
ergo diyAudio Member Join Date: Mar 2001 Location: Tallinn, Estonia	www.freetradezone.com gives these results IRF240 - TO3 metal case transistors (Semelab and General electric) IRFP240 - TO247 or TO3P (Fairchild and National respectively) Ergo

13th February 2002, 11:18 PM	#4
Musher diyAudio Member Join Date: Dec 2001 Location: Vantaa/Finland	Fairchild has some versions of IRFP240/9240 that end with A or B as far as I remember. _R4941 is an extension to the order code that means the industry standard model with known original spesifications is in question. -Kimmo S. BTW. are TO-247 and TO3P really the one and the same?

14th February 2002, 05:44 PM	#6
Musher diyAudio Member Join Date: Dec 2001 Location: Vantaa/Finland	I have a catalog (Finnish Suomen huoltopalvelu Oy) on my lap, and it has some mica washers for sale. TO-220 is just like we all know it. So is TO-3. But there is one that is square-shaped, a little bigger (wider) than TO-220 and it has three codes for it: SOT-93, TO-3P and ISO-218. Fischer's catalog had same dimensions for something it calls TO-218 and TO-247. So after a little research it seems that after all TO-3P (not a misspelled TO-3) and TO-247 are the same. Though I'm a bit lost why the SHP catalog has also TOP-3, a 17.5x20.5mm square with top corners cut, i.e. rectangle like a half hexagon added to it. TO3P = flat 20x26mm body (Magnatec) TO247 = flat 15x20mm body (Magnatec) TO 3 PF = 20x24mm square (Fischer's catalog) TO 247/1 = 21x24mm square (Fischer's catalog) In SHP catalog all are out of scale and not detailed anywhere