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Identify the correct terminal names of a power MOSFET used in power electronics.

Difficulty: Easy

Correct Answer: Source, Gate, Drain

Explanation:


Introduction / Context:
Device terminal identification is foundational for correct connection and analysis. Power MOSFETs dominate switching converters, motor drives, and SMPS designs, and their three terminals have standardized names.


Given Data / Assumptions:

  • Device: power MOSFET (enhancement-mode).
  • Three external terminals.
  • Standard industry nomenclature.


Concept / Approach:
A MOSFET has a Gate (G) controlling channel conductivity between Source (S) and Drain (D). In contrast, BJTs have Emitter, Base, Collector; SCRs have Anode, Cathode, Gate. Therefore, the correct terminal set for a MOSFET is Source, Gate, Drain.


Step-by-Step Solution:

Map device family → MOSFET.Recall standard names → Source, Gate, Drain.Eliminate names belonging to BJTs (E, B, C) or thyristors (A, K, G).


Verification / Alternative check:

Check typical MOSFET symbol: Arrow on body diode indicates S–D orientation; gate insulated from channel.


Why Other Options Are Wrong:

Emitter/Base/Collector → BJT; Cathode/Anode/Gate → SCR/triac family; mixed sets are invalid.


Common Pitfalls:

Confusing BJT and MOSFET terminals due to similar three-lead packaging.


Final Answer:

Source, Gate, Drain
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