How to read N-E-Mosfet

[Serge 125]

Hi all

Ok I have this little electronic checking gadget that you can get from China (see photo) and when I check my N-E-Mosfet I get these values BUT when I look at the data sheet I don't see the values that the little gadget gives. For example; The N-E-Mosfet that I have gives these 2 readings on the gadget 1; C = 4.61 NF 2; VT = 3.1 V . Now when I look at the data sheet I don't see C and VT and even NF. So what must I look for on a data sheet with this gadget values?? THANKS!!

 

[rjenkinsgb]

Example data sheet:

https://www.onsemi.com/pub/Collateral/NTB5860NL-D.PDF

In this one, the gate capacitance is given on page 2 - 13216 pF which is 13.216 nF
Gate voltage threshold is also on page 2, between 1 and 3 volts for this specific device.

Different makers may give the info in slightly different formats.

 

[Serge 125]

Gee it would be nice to have a list that would translate this!! I just checked for a NPN and diff reading than the mosfet. I have hFE and uf that I (again) can't find on a data sheet.

 

[Danwvw]

Capacitance is difficult to measure accurately especially those low value ranges. Best to go with the Data Sheet if you have it. I would be surprised if it were possible to identify parts at all using that device. Do MOSFET's even have an hFE ie gain?

 

[Pommie]

Is an N-E-MOSFET an N channel Enhanced MOSFET?

Mike.

 

[Nigel Goodwin]

Capacitance is difficult to measure accurately especially those low value ranges. Best to go with the Data Sheet if you have it. I would be surprised if it were possible to identify parts at all using that device. Do MOSFET's even have an hFE ie gain?

No, but he never suggested they did - the Hfe was for an NPN transistor.

However, these devices are EXTREMELY capable, and incredibly useful - they certainly do their best to tell you what the device is, and easily and accurately determine device type across a wide range of components.

They are so cheap and useful there's no excuse not to have one (or more than one ), and the kits are fun to build as well - I think I have four or so?.