component
BC857AW-7-F
Public Made by Adomby adom
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc857aw-7-f.step/bc857aw-7-f.glbare 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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).
# 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](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8560093233737711616) (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](docs/bc857aw-7-f-datasheet.pdf)