Mosfet cross ref. Help

[Yoda439]

Hello all, I need to verify a power Mosfet for a Clarion A2000 car amp I am repairing. It reads MT 5P, 0N05E, (M) 342 I did a search and came up with this was a Motorola No. Now owned by ON Semiconductor and new no. is MTP50P03HDLG being a P-Ch Mosfet 30V at 50A 25 Mega Ohms. This is a digikey no. I came up with is this correct? One of them was blown apart and another was cracked. There are 6 total and I am going to replace them all because they all tested between 3 and 49 ohms and should be in high mega ohms. Digikey wants $4 ea for these. Is there a another safe supplier where I don't get counterfeit ones? Thanks

 

[eng1]

Hello all, I need to verify a power Mosfet for a Clarion A2000 car amp I am repairing. It reads MT 5P, 0N05E, (M) 342 I did a search and came up with this was a Motorola No. Now owned by ON Semiconductor and new no. is MTP50P03HDLG being a P-Ch Mosfet 30V at 50A 25 Mega Ohms. This is a digikey no. I came up with is this correct? One of them was blown apart and another was cracked. There are 6 total and I am going to replace them all because they all tested between 3 and 49 ohms and should be in high mega ohms. Digikey wants $4 ea for these. Is there a another safe supplier where I don't get counterfeit ones? Thanks

I haven't checked the Motorola part. The MTP50P03HDLG has an RDSon of 25 mohms, or 0.025 ohms, that is a very low resistance (on state).
How did you test the FETs? Did you remove them from the board? You usually use the 'diode function' of a suitable multimeter to perform a 'go/no-go' test.

It's not easy to find a suitable replacement of an FET. You must evaluate all the key-parameters of the FET in your application. If you can find the exact part, I would suggest that you buy it.

 

[Yoda439]

The MosFet is blown apart also 3rd from right has crack and arc spot.Probed outer legs.Should read in meg ohms but read 4-49 ohms. I posted pic. Thanks

 

[Yoda439]

Correction it is 4th from right that is cracked. Did a cross ref. search at NTE also. Don't like their parts or prices though.

 

[shokjok]

At least you can get replacement parts from NTE. If you continue shopping around, you'll pay either higher prices and shipping costs, or enough money for a new product. Obtain the NTE parts. At least if they fail, no more cross-references or searches will occur.