Author Topic: Replacement (equivalent) for P140NF55  (Read 2609 times)

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Offline txescientist

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Replacement (equivalent) for P140NF55
« on: August 09, 2014, 08:29:13 pm »
Can someone tell me equivalent mosfet for P140NF55 in APC UPS? Can I use IRF1405?
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« Last Edit: August 09, 2014, 08:33:34 pm by txescientist »
 

Online tautech

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Re: Replacement (equivalent) for P140NF55
« Reply #1 on: August 10, 2014, 03:04:05 am »
Google search for "P140NF55" finds a few datasheets.
Any correct substitution should match most parameters.
VDS, A, RDSON, being the most important. Gate characteristics are also important when placing in a existing application to match the designers calculations.
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Offline mij59

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Re: Replacement (equivalent) for P140NF55
« Reply #2 on: August 10, 2014, 05:08:08 am »
Hi,

It's better to replace with the same type, why do you want an equivalent ?
The Save Operation Area of the IRF1405 is smaller, could be a problem.
 

Offline txescientist

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Re: Replacement (equivalent) for P140NF55
« Reply #3 on: August 10, 2014, 06:41:13 am »
Thank you for replying. I can't buy the original part in my country and that is the only problem (I could order it, but the shipping is 20-30 days and I can't wait that long).
 

Online wraper

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Re: Replacement (equivalent) for P140NF55
« Reply #4 on: August 10, 2014, 07:54:19 am »
Hi,

It's better to replace with the same type, why do you want an equivalent ?
The Save Operation Area of the IRF1405 is smaller, could be a problem.
Actually it has noticeably bigger safe operation area than STP140NF55. IRF1405 also have a 2x max drain current and lower RDS(on). Gate capacitance few % bigger. It will work, but it is not a good idea to use it if there are any STP140NF55 in parallel. And better to get STP140NF55 anyway as it is cheaper.
 


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