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Your cart is empty. BOJACK IRF4905 MOSFET is a field effect transistor that can be
widely used in analog circuits and digital circuits.
Basic parameters:
The IRF4905 is available in a TO-220AB package
On-state resistance Rds(on): 0.02 ohm
Voltage Vgs highest: ±20V
Number of stitches: 3
Operating Temperature:-55 °C to +175 °C
Thermal resistance junction to case A: 1.3°C/W
Voltage Vds Typical: 55V
Current Id continuous: 74A
Current Idm pulse: 260A
Surface Mount Device: Through Hole Mounting
Lead-free environmental protection
Aspet Gharakhanian
September 2, 2025
Transistors are well priced and met the requirements of our project. Excellent for switching applications.Prof. A. Gharakhanian
fulleclipse
July 25, 2025
I haven't put them to use in a project yet, but they all tested OK, so I am hopeful that they will preform as advertised.
James Lohr
June 14, 2025
As others have stated, this is a bad substitute for the original with the same designation
George
May 19, 2025
Tested ok 3.5v enh P ch mosfet.
Lovely Musician
April 27, 2025
Very good
farm mom
April 15, 2025
They do work as P-channel MOSFETs. The one thing I want to point out is that they have excessive resistance. International Rectifier's claimed Rds on resistance for the IRF4905 is 0.02Ω. I measured these at between 0.07Ω and 0.09Ω. For my application that is not super significant (the worst effect being extra heat to deal with), but it definitely deserves to be noted. These are not the real IR part.
J. Barker
March 21, 2025
These are obvious counterfeit transistors. My Atlas identifier says these aren't even MOSFET's... Some of them tested as bjt's others just gave an error...
MonkeySue
February 7, 2025
I am pleased w/ this purchase. The package included 10 transistors. Each was labelled "4905 B9P0". All were functional. I tested (a) on/off-state function and (b) turn-on threshold voltage. All showed on/off-state consistent w/ a P-channel MOSFET. To measured the turn-on voltage I began at -1.3v, applied on the gate, moving progressively more negative to -6v, and concurrent measured the current across source and drain. Gate turn-on voltage was consistent w/ the datasheet (range -2v to -4v): all units were fully turned-on within this range. At -1.3v and -2.5v the current was 58% and 95-100%, respectively, of the ultimate plateau current. I did not test (a) turn on/off time; nor (b) voltage/current near max allowed values.
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