Protected Mosfet
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 STP55NF06L |
STripFETTM II Power MOSFET -- Integrated source-drain zener | ||
Pololu Electronics | STMicroelectronics VNP14NV04-E |
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 IRLB8743 |
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 IRFZ44N |
55V 49A 0.017 ohm, internal zeners, for extruder | |||
Sanguinololu | Fairchild RFP30N06LE |
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 IRLB8743 |
30V 78A 0.0032 ohm, internal zeners | ||
RAMPSXB | SMD PSMN7R0-30YLC |
30V 60A | A fork will continue to allow through hole Mosfets. | |
SinapTec | Your choice! My personal choice is | International Rectifier IRLB8743 |
} | --Jobo (talk) 00:34, 6 September 2017 (PDT) |