Protected Mosfet

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A protected MOSFET contains integrated transient surge protection circuitry (a source-drain zener) and is less susceptible to electrostatic discharge and other transients, as compared to standard, unprotected MOSFETs.

A "intelligent switch" contains, in addition, an integrated temperature sensor, and automatically turns itself off if it gets too hot. [1] [2] [3]

MOSFET choice, when you are soldering, may be construed as "kind of a personal thing". In RepRap designs the standard is N Channel MOSFETs. Any of the below should work in any electronics you solder, the difference is in the voltage and current they (can) handle. Zener diodes built in will prevent MOSFETs from bgeing damaged if incorrectly 'wired' in, or if voltage or current spike exceeds capacity.

Nearly all RepRap electronics in 2017, including all designs below, use N channel MOSFETS. Examples of MOSFETS (most are protected) in RepRap electronics are:

Electronics MOSFET Part Number Notes
RAMPS STMicroelectronics
STripFETTM II Power MOSFET -- Integrated source-drain zener
Pololu Electronics STMicroelectronics
MOSFET OMNIFETII 40V 12A 0.02 ohm TO-220 -- Thermal, short, overvoltage, feedback, ESD
R2C2 electronics Unprotected MOSFETS External protection provided on board with zeners
Generation 7 Electronics International Rectifier
30V 78A 0.0032 ohm, internal zeners, for heated bed (no heatsink with low freq PWM) (See Gen7_Research#MOSFET_Heat_and_MOSFET_Type
International Rectifier
55V 49A 0.017 ohm, internal zeners, for extruder
Sanguinololu Fairchild
30A, 60V, ESD Rated, 0.047 Ohm, Logic Features

Level N-Channel Power MOSFETs -- 2KV esd, integrated source-drain zener, integrated gate-source zeners

SevenSwitch International Rectifier
30V 78A 0.0032 ohm, internal zeners
30V 60A A fork will continue to allow through hole Mosfets.
SinapTec Your choice! My personal choice is International Rectifier
30V 78A 0.0032 ohm, internal zeners --Jobo (talk) 00:34, 6 September 2017 (PDT)