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BC857AW-7-F

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Diodes Incorporated Bipolar (BJT), SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BC857AW-7-F

Diodes Incorporated · Bipolar (BJT) · SOT-323

BC857AW-7-F from Diodes Incorporated, in a SOT-323. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 B input Base of the PNP transistor, shown at bottom left of the top-view pin-out.
2 E passive Emitter of the PNP transistor, shown at bottom right of the top-view pin-out; VEBO is -5.0 V max.
3 C passive Collector of the PNP transistor, the single pin on the top side of the package; continuous IC is -100 mA max and VCEO is -45 V max for BC857.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-323
Category Transistors/Thyristors
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Collector-Base Breakdown Voltage (BC857) BVCBO -50 V IC = -100µA 3
Collector-Emitter Breakdown Voltage (BC857) BVCEO -45 V IC = -10mA 3
Emitter-Base Breakdown Voltage BVEBO -5 V IE = -100µA 3
DC Current Gain (Current Gain Group A) hFE 125 180 250 VCE = -5.0V, IC = -2.0mA 3
Collector Cutoff Current ICBO -15 nA VCB = -30V 3
Collector Cutoff Current ICBO -4 µA VCB = -30V, TA = +150°C 3
Collector-Emitter Saturation Voltage VCE(sat) -75 -300 mV IC = -10mA, IB = -0.5mA 3
Collector-Emitter Saturation Voltage VCE(sat) -250 -650 mV IC = -100mA, IB = -5.0mA 3
Base-Emitter Turn-On Voltage VBE(on) -600 -650 -750 mV IC = -2mA, VCE = -5V 3
Base-Emitter Turn-On Voltage VBE(on) -820 mV IC = -10mA, VCE = -5V 3
Base-Emitter Saturation Voltage VBE(sat) -850 -950 mV IC = -100mA, IB = -5mA 3
Output Capacitance Cobo 3 4.5 pF VCB = -10V, f = 1.0MHz 3
Transition Frequency fT 100 200 MHz VCE = -5V, IC = -10mA, f = 100MHz 3
Noise Figure NF 10 dB VCE = -5V, IC = -200µA, RS = 2kΩ, f = 1kHz, Δf = 200Hz 3
Base-Emitter Saturation Voltage VBE(sat) -700 mV IC = -10mA, IB = -0.5mA 3
Collector-Base Voltage (BC857) VCBO -50 V 2
Collector-Emitter Voltage (BC857) VCEO -45 V 2
Emitter-Base Voltage VEBO -5 V 2
Continuous Collector Current IC -100 mA 2
Peak Pulse Collector Current ICM -200 mA single pulse 2
Peak Pulse Emitter Current IEM -200 mA single pulse 2
Power Dissipation PD 200 mW Note 5: minimum recommended pad layout, 1oz copper, single-sided FR4 PCB, still air 2
Thermal Resistance, Junction to Ambient RθJA 625 °C/W Note 5: minimum recommended pad layout, 1oz copper, single-sided FR4 PCB, still air 2
Operating and Storage Temperature Range TJ, TSTG -55 150 °C 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin • Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208 1

CAD (KiCad official)

  • Symbol: BC857AW-7-F
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323 (KiCad packages3D, STEP)
  • 3D model files: bc857aw-7-f-etched.step / bc857aw-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bc857aw-7-f.step / bc857aw-7-f.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Diodes Incorporated datasheet (6 pp, sha256 8524b3f1e7fd66f2, retrieved 2026-10-20, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF