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Old 8th May 2011, 12:40 AM   #1
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Join Date: Mar 2010
Default International Rectifier...

Hi

I am in need of a replacement for a IntRect NE-22, 743G.
This a rectifier and IR says they know what the reference to the replacement part is, but won't tell me due to non-dis-closer and Vishay won't say either.
Please help
This unit is one of four NE-22 that make up the Curtis motor speed control model 1208-2344.
Thanks in advace
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Old 8th May 2011, 03:36 AM   #2
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Location: Edmonton, AB Canada
philmagnotta, I tried xref at NTE-Electronic Components Supplier-Catalog-Cross Reference with no luck, it's a house numbered part. All you can do is estimate the requirements and try substitutes.

Curtis DC motor speed controller PWM 15kHz, 24V 55A. Picture of the board looks like 4 TO-220's like a MOSFET H-bridge; option for 8 TO-220's;
Any diodes would be fast-recovery parts and not hard to find if you know the pinout and single/dual. The MOSFETS are trickier and the high-failure rate item. Depending on the heatsinking, lowest RDS ON you can find at 55/60V.
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Old 8th May 2011, 08:54 AM   #3
RJM1 is offline RJM1  United States
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Location: Titusville, Fl.
You might want to look at this thread.
- Unknown device

There it was a straight swap for the IRFZ44V N-MOSFET.
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Old 8th May 2011, 12:30 PM   #4
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is the NE-22 an N or P type?
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Old 8th May 2011, 01:59 PM   #5
RJM1 is offline RJM1  United States
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IRFZ44V is the part number, N-MOSFET implies N type.
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Old 8th May 2011, 05:06 PM   #6
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Quote:
Originally Posted by RJM1 View Post
IRFZ44V is the part number, N-MOSFET implies N type.
Thank you RMJ1.
I'm passing this info on to another party, so perhaps your information will get us started.
Thank you for your help!
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