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Are MOSFETs efficient?
The silicon MOSFET has become a key component in the design of DC/DC converters, providing the high-speed switching and current-handling capability needed to implement high-efficiency, pulse-width-modulation-based control strategies.
Are relays efficient?
Relays are highly versatile components that are just as effective in complex circuits as in simple ones. They can be used in the place of other forms of switches, or they can be specifically designed based on factors such as required amperage.
Which is better a MOSFET or a mechanical relay?
In short, mechanical relays are robust, safe, and excellent for AC line power switching, but are slower, bulkier, less efficient with DC and trickier to drive with an Arduino. MOSFETs are fast, highly efficient with DC and easy to drive, but they are not isolated and cannot switch AC voltages.
What’s the difference between MOSFET and DC voltage?
Power MOSFETs, by contrast, can only switch DC voltages. The voltage ratings of MOSFETs vary from 12V all the way up to 1000V. Although single power MOSFETs cannot switch AC voltages, some configurations of multiple MOSFETs achieve this too. 2 Current ratings
What kind of impedance does a power relay have?
The electromechanical relay contacts have always presented an infinite impedance in the open state and only a milliOhm or so loss in the closed state. As shown in Fig. 2, the power MOSFET portion of a solid-state relay had considerably higher on-resistance in the late 1980s and has made remarkable improvements.
Which is more expensive a BJT or a MOSFET?
Relays are more expensive, but they have moving parts. BJTs and MOSFETs produce a lot of heat (with high currents). They both have three pins (usually) called the base, collector and emitter (in the case of BJT) or gate, source, drain (in the case of MOSFET). More info here Relays use a magnet to control the position of a metal switch.