F121A NPN Transistor

The F121A is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the F121A transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The F121A 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 F121A transistor as follows.

F121A Transistor Specification

Transistor Code		F121A
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO53
Collector Power Dissipation (Maximum)	PC	85W
Collector-Base Voltage (Maximum)	VCB	55V
Collector-Emitter Voltage (Maximum)	VCE	55V
Collector Current (Maximum)	IC	4A
Operating Junction Temperature (Maximum)	TJ	100°C
Forward Current Transfer Ratio (hFE Value)		10
Transition Frequency	FT	1MHz

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