UN4221 Datasheet and Replacement
Type Designator: UN4221
Material of Transistor: Si
Polarity: Pre-Biased-NPN
Built in Bias Resistor R1 = 2.2 kOhm
Built in Bias Resistor R2 = 2.2 kOhm
Typical Resistor Ratio R1/R2 = 1
Maximum Collector Power Dissipation (Pc): 0.6 W
Maximum Collector-Base Voltage |Vcb|: 50 V
Maximum Collector-Emitter Voltage |Vce|: 50 V
Maximum Collector Current |Ic max|: 0.5 A
Max. Operating Junction Temperature (Tj): 150 °C
Transition Frequency (ft): 200 MHz
Forward Current Transfer Ratio (hFE), MIN: 40
Noise Figure, dB: -
Package: TO92S
UN4221 Substitution
UN4221 Datasheet (PDF)
un4221 un4222 un4223 un4224.pdf

Transistors with built-in ResistorUN4221/4222/4223/4224Unit: mmSilicon NPN epitaxial planer transistor4.0 0.2For digital circuitsFeatures Costs can be reduced through downsizing of the equipment andreduction of the number of parts. New S type package, allowing supply with the radial taping.markingResistance by Part Number1 2 3(R1)(R2) UN4221 2.2k 2.2k UN422
Datasheet: UN4217S , UN4218 , UN4219 , UN421D , UN421E , UN421F , UN421L , UN421K , 2N2907 , UN4222 , UN4223 , UN4224 , UN5210Q , UN5210R , UN5210S , UN5211 , UN5212 .
History: BUW52 | BUW51 | UN4116R
Keywords - UN4221 transistor datasheet
UN4221 cross reference
UN4221 equivalent finder
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History: BUW52 | BUW51 | UN4116R



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