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Transistors: BJT vs MOSFET Buying Guide
Transistor buying guide: BJT, MOSFET, IGBT, parameters and sourcing.
Transistor buying guide: BJT, MOSFET, IGBT, parameters and sourcing.
Transistors amplify and switch signals. This guide explains BJT vs MOSFET and how to buy them.
By Vigny (深圳市华芯购电子有限公司) · Published 2026-09-27 · Data verified 2026-09-29 · Sources: manufacturer datasheets & HuaXinGou stock verification
Bipolar transistors (2N2222, 2N3904, S8550) are current-controlled, cheap and simple for small-signal switching and amplification. Gain (hFE) and saturation matter.
MOSFETs (2N7002, AO3400, IRF540) are voltage-controlled with low RDS(on), ideal for power switching. Drive voltage, Qg and thermal budget are key.
For high voltage/current (motor drives, inverters), IGBTs and power modules combine fast switching with high blocking voltage.
Transistors are commodity parts with wide availability. HuaXinGou supplies BJT/MOSFET families with brand and batch verification, plus parameter-matched alternatives.
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