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KF621 NPN Transistor

The KF621 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the KF621 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The KF621 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 KF621 transistor as follows.

Circuit diagram symbol of the KF621 transistor

KF621 Transistor Specification

Transistor Code KF621
Transistor Type BJT
Transistor Polarity NPN
Transistor Material Silicon(SI)
Package TO5
Collector Power Dissipation (Maximum) PC 3.5W
Collector-Base Voltage (Maximum) VCB 40V
Collector-Emitter Voltage (Maximum) VCE 20V
Collector Current (Maximum) IC 0.4A
Operating Junction Temperature (Maximum) TJ 150°C
Emitter-Base Voltage (Maximum) VEB 2V
Forward Current Transfer Ratio (hFE Value) 30
Transition Frequency FT 470MHz

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