PN4257 Specs and Replacement

Type Designator: PN4257

Material of Transistor: Si

Polarity: NPN

Absolute Maximum Ratings

Maximum Collector Power Dissipation (Pc): 0.35 W

Maximum Collector-Base Voltage |Vcb|: 12 V

Maximum Collector-Emitter Voltage |Vce|: 12 V

Maximum Emitter-Base Voltage |Veb|: 4 V

Maximum Collector Current |Ic max|: 0.1 A

Max. Operating Junction Temperature (Tj): 150 °C

Electrical Characteristics

Transition Frequency (ft): 700 MHz

Collector Capacitance (Cc): 3 pF

Forward Current Transfer Ratio (hFE), MIN: 30

Noise Figure, dB: -

Package: TO92

 PN4257 Substitution

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PN4257 datasheet

 9.1. Size:294K  fairchild semi

 pn4250a.pdf pdf_icon

PN4257

Discrete POWER & Signal Technologies PN4250A C TO-92 B E PNP General Purpose Amplifier This device is designed for use as general purpose amplifiers and switches requiring collector currents to 300 mA. Sourced from Process 68. See PN200 for characteristics. Absolute Maximum Ratings* TA = 25 C unless otherwise noted Symbol Parameter Value Units V Collector-Emitter Voltage 60 V CEO ... See More ⇒

 9.2. Size:294K  fairchild semi

 pn4250.pdf pdf_icon

PN4257

Discrete POWER & Signal Technologies PN4250 C TO-92 B E PNP General Purpose Amplifier This device is designed for use as general purpose amplifiers and switches requiring collector currents to 300 mA. Sourced from Process 68. See PN200 for characteristics. Absolute Maximum Ratings* TA = 25 C unless otherwise noted Symbol Parameter Value Units V Collector-Emitter Voltage 40 V CEO ... See More ⇒

Detailed specifications: PN4140, PN4141, PN4142, PN4143, PN4248, PN4249, PN4250, PN4250A, 2SB817, PN4258, PN4258A, PN4274, PN4275, PN4354, PN4355, PN4356, PN4401

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