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Old 8th June 2005, 02:56 PM   #1
AR1 is offline AR1  United States
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Default Motorola Fet

I need to find the following parts MTW 14P20 MTW 20N20. They were originally made by Motorola and are apparently not in manufacture. Any body have a good parts connection here in the states that would be able to ship overnight?
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Old 8th June 2005, 03:01 PM   #2
Magura is offline Magura  Denmark
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Take a look at www.onsemi.com

Onsemi is AFAIK the semiconductor branch of Motorola.


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Old 8th June 2005, 03:09 PM   #3
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http://www.onsemi.com/site/products/...32N20E,00.html
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Old 8th June 2005, 03:09 PM   #4
AR1 is offline AR1  United States
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Quote:
Originally posted by Magura
Take a look at www.onsemi.com

Onsemi is AFAIK the semiconductor branch of Motorola.


Magura
Thanks I will give them a hollar...
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Old 8th June 2005, 03:12 PM   #5
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Or the real simple and easy solution, use IRFP240 for the N channel, and IRFP9240 for the P channel.


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Old 8th June 2005, 03:18 PM   #6
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Default Compatibility

Quote:
Originally posted by Magura
Or the real simple and easy solution, use IRFP240 for the N channel, and IRFP9240 for the P channel.


Magura

Yes I have another amplifier that I replaced with the IRF types. However this amplifier has one channel in tact and the other channel is fried, because the amplifier can be bridged I am concerned about cross conduction, bucking and or total failure of both OPS. Any thoughts?
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Old 8th June 2005, 03:22 PM   #7
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Default Ratings

Quote:
Originally posted by Magura
Or the real simple and easy solution, use IRFP240 for the N channel, and IRFP9240 for the P channel.


Magura
The IRF Parts are rated at 12 Amps D to S, The original Motorola parts are rated at 18 amps D to S. Do you feel this may be an issue? The OPS uses three parallel pairs.
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Old 8th June 2005, 03:23 PM   #8
AR1 is offline AR1  United States
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Quote:
Originally posted by Magura
Take a look at www.onsemi.com

Onsemi is AFAIK the semiconductor branch of Motorola.


Magura


They do not carry the parts, guess I am SOL...
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Old 8th June 2005, 03:50 PM   #9
Magura is offline Magura  Denmark
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Default Re: Ratings

Quote:
Originally posted by AR1
I need to find the following parts MTW 14P20 MTW 20N20.

Quote:
Originally posted by AR1


The IRF Parts are rated at 12 Amps D to S, The original Motorola parts are rated at 18 amps D to S. Do you feel this may be an issue? The OPS uses three parallel pairs.

The IRFP240 is rated 18A 200V, the MTW20N20 is 20A 200V, sure not a problem.

The IRFP9240 is rated 12A 200V, the MTW14P20 is rated 14A 200V, sure also not a problem.

Just replace the FET's in both channels, those IR parts are fairly cheap, so it's not gonna break the bank to do so.


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Old 8th June 2005, 05:03 PM   #10
AR1 is offline AR1  United States
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Default Re: Re: Ratings

Quote:
Originally posted by Magura






The IRFP240 is rated 18A 200V, the MTW20N20 is 20A 200V, sure not a problem.

The IRFP9240 is rated 12A 200V, the MTW14P20 is rated 14A 200V, sure also not a problem.

Just replace the FET's in both channels, those IR parts are fairly cheap, so it's not gonna break the bank to do so.


Magura
Thanks again, I did order the IRFP replacements, will see what happens.
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