UN4123 Datasheet. Specs and Replacement
Type Designator: UN4123 📄📄
Material of Transistor: Si
Polarity: Pre-Biased-PNP
Built in Bias Resistor R1 = 10 kOhm
Built in Bias Resistor R2 = 10 kOhm
Typical Resistor Ratio R1/R2 = 1
Absolute Maximum Ratings
Maximum Collector Power Dissipation (Pc): 0.3 W
Maximum Collector-Base Voltage |Vcb|: 50 V
Maximum Collector-Emitter Voltage |Vce|: 50 V
Maximum Emitter-Base Voltage |Veb|: 6 V
Maximum Collector Current |Ic max|: 0.5 A
Max. Operating Junction Temperature (Tj): 150 °C
Electrical Characteristics
Transition Frequency (ft): 200 MHz
Forward Current Transfer Ratio (hFE), MIN: 60
Package: TO92S
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UN4123 datasheet
un4121 un4122 un4123 un4124 un412x un412y.pdf 
Transistors with built-in Resistor UN4121/4122/4123/4124/412X/412Y Silicon PNP epitaxial planer transistor For digital circuits Unit mm 4.0 0.2 Features Costs can be reduced through downsizing of the equipment and reduction of the number of parts. New S type package, allowing supply with the radial taping. Resistance by Part Number marking (R1)(R2) 1 2 3 UN4121 2.2k 2.2k ... See More ⇒
Detailed specifications: UN4119, UN411D, UN411E, UN411F, UN411H, UN411L, UN4121, UN4122, 2N4401, UN4124, UN412X, UN412Y, UN4210Q, UN4210R, UN4210S, UN4211, UN4212
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