MRF221 NPN Transistor

The MRF221 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the MRF221 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The MRF221 transistor symbol shows an arrow from the base into the emitter. This means that the current flows from collector terminal to emitter terminal.

Circuit diagram symbol of the MRF221 transistor as follows.

MRF221 Transistor Specification

Transistor Code		MRF221
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		M174
Collector Power Dissipation (Maximum)	PC	31W
Collector-Base Voltage (Maximum)	VCB	36V
Collector-Emitter Voltage (Maximum)	VCE	18V
Collector Current (Maximum)	IC	2.5A
Operating Junction Temperature (Maximum)	TJ	200°C
Emitter-Base Voltage (Maximum)	VEB	4V
Forward Current Transfer Ratio (hFE Value)		5
Collector Capacitance	CC	85pF

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