component
BC857A
Public Made by Adomby adom
Nexperia Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
← Commit history
bc857a: specified limits as data (metadata.characteristics, 26 rows from the datasheet)
2 files changed
+353−1
README.md+33@@ -21,6 +21,39 @@ BC857A from Nexperia, in a SOT-23. Pinout and pin descriptions extracted from th | 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 voltage (BC857; BC857A; BC857B; BC857C) | VCBO | | | -50 | V | open emitter | 3 |+| collector-emitter voltage (BC857; BC857A; BC857B; BC857C) | VCEO | | | -45 | V | open base | 3 |+| emitter-base voltage | VEBO | | | -5 | V | open collector | 3 |+| collector current | IC | | | -100 | mA | | 3 |+| peak collector current | ICM | | | -200 | mA | | 3 |+| peak base current | IBM | | | -200 | mA | | 3 |+| total power dissipation | Ptot | | | 250 | mW | Tamb ≤ 25 °C [1] | 3 |+| junction temperature | Tj | | | 150 | °C | | 3 |+| ambient temperature | Tamb | -65 | | 150 | °C | | 3 |+| storage temperature | Tstg | -65 | | 150 | °C | | 3 |+| thermal resistance from junction to ambient | Rth(j-a) | | | 500 | K/W | in free air [1] | 4 |+| collector-base breakdown voltage (BC857A) | V(BR)CBO | -50 | | | V | IC = -100 µA; IE = 0 A | 5 |+| collector-emitter breakdown voltage (BC857A) | V(BR)CEO | -45 | | | V | IC = -2 mA; IB = 0 A | 5 |+| emitter-base breakdown voltage | V(BR)EBO | -5 | | | V | IC = 0 A; IE = -100 µA | 5 |+| collector-base cut-off current | ICBO | | -1 | -15 | nA | VCB = -30 V; IE = 0 A | 5 |+| collector-base cut-off current | ICBO | | | -4 | µA | VCB = -30 V; IE = 0 A; Tj = 150 °C | 5 |+| emitter-base cut-off current | IEBO | | | -100 | nA | VEB = -5 V; IC = 0 A | 5 |+| DC current gain (BC857A) | hFE | 125 | | 250 | | VCE = -5 V; IC = -2 mA | 5 |+| collector-emitter saturation voltage | VCEsat | | -75 | -300 | mV | IC = -10 mA; IB = -0.5 mA | 5 |+| collector-emitter saturation voltage | VCEsat | | -250 | -650 | mV | IC = -100 mA; IB = -5 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.02 | 5 |+| base-emitter saturation voltage | VBEsat | | -700 | | mV | IC = -10 mA; IB = -0.5 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.02 | 5 |+| base-emitter saturation voltage | VBEsat | | -850 | | mV | IC = -100 mA; IB = -5 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.02 | 5 |+| base-emitter voltage | VBE | -600 | -650 | -750 | mV | VCE = -5 V; IC = -2 mA | 5 |+| base-emitter voltage | VBE | | | -820 | mV | VCE = -5 V; IC = -10 mA | 5 |+| transition frequency | fT | 100 | | | MHz | VCE = -5 V; IC = -10 mA; f = 100 MHz | 5 |+| noise figure | NF | | 2 | 10 | dB | IC = -200 µA; VCE = -5 V; RS = 2 kΩ; f = 1 kHz; B = 200 Hz | 5 |+ ## CAD (KiCad official) - Symbol: `BC857A`
page.json+320−1@@ -150,6 +150,325 @@ "Package": "SOT-23", "Category": "Transistors/Thyristors", "Pins": "3"+ },+ "characteristics": {+ "version": 1,+ "source": "datasheet",+ "datasheet_sha256": "d9a836e40dd8f1e7",+ "rows": [+ {+ "name": "collector-base voltage (BC857; BC857A; BC857B; BC857C)",+ "symbol": "VCBO",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": -50,+ "conditions": "open emitter",+ "source_page": 3,+ "source": "datasheet"+ },+ {+ "name": "collector-emitter voltage (BC857; BC857A; BC857B; BC857C)",+ "symbol": "VCEO",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": -45,+ "conditions": "open base",+ "source_page": 3,+ "source": "datasheet"+ },+ {+ "name": "emitter-base voltage",+ "symbol": "VEBO",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": -5,+ "conditions": "open collector",+ "source_page": 3,+ "source": "datasheet"+ },+ {+ "name": "collector current",+ "symbol": "IC",+ "kind": "absolute_maximum",+ "unit": "mA",+ "min": null,+ "typ": null,+ "max": -100,+ "conditions": "",+ "source_page": 3,+ "source": "datasheet"+ },+ {+ "name": "peak collector current",+ "symbol": "ICM",+ "kind": "absolute_maximum",+ "unit": "mA",+ "min": null,+ "typ": null,+ "max": -200,+ "conditions": "",+ "source_page": 3,+ "source": "datasheet"+ },+ {+ "name": "peak base current",+ "symbol": "IBM",+ "kind": "absolute_maximum",+ "unit": "mA",+ "min": null,+ "typ": null,+ "max": -200,+ "conditions": "",+ "source_page": 3,+ "source": "datasheet"+ },+ {+ "name": "total power dissipation",+ "symbol": "Ptot",+ "kind": "absolute_maximum",+ "unit": "mW",+ "min": null,+ "typ": null,+ "max": 250,+ "conditions": "Tamb ≤ 25 °C [1]",+ "source_page": 3,+ "source": "datasheet"+ },+ {+ "name": "junction temperature",+ "symbol": "Tj",+ "kind": "absolute_maximum",+ "unit": "°C",+ "min": null,+ "typ": null,+ "max": 150,+ "conditions": "",+ "source_page": 3,+ "source": "datasheet"+ },+ {+ "name": "ambient temperature",+ "symbol": "Tamb",+ "kind": "absolute_maximum",+ "unit": "°C",+ "min": -65,+ "typ": null,+ "max": 150,+ "conditions": "",+ "source_page": 3,+ "source": "datasheet"+ },+ {+ "name": "storage temperature",+ "symbol": "Tstg",+ "kind": "absolute_maximum",+ "unit": "°C",+ "min": -65,+ "typ": null,+ "max": 150,+ "conditions": "",+ "source_page": 3,+ "source": "datasheet"+ },+ {+ "name": "thermal resistance from junction to ambient",+ "symbol": "Rth(j-a)",+ "kind": "thermal",+ "unit": "K/W",+ "min": null,+ "typ": null,+ "max": 500,+ "conditions": "in free air [1]",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "collector-base breakdown voltage (BC857A)",+ "symbol": "V(BR)CBO",+ "kind": "electrical",+ "unit": "V",+ "min": -50,+ "typ": null,+ "max": null,+ "conditions": "IC = -100 µA; IE = 0 A",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "collector-emitter breakdown voltage (BC857A)",+ "symbol": "V(BR)CEO",+ "kind": "electrical",+ "unit": "V",+ "min": -45,+ "typ": null,+ "max": null,+ "conditions": "IC = -2 mA; IB = 0 A",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "emitter-base breakdown voltage",+ "symbol": "V(BR)EBO",+ "kind": "electrical",+ "unit": "V",+ "min": -5,+ "typ": null,+ "max": null,+ "conditions": "IC = 0 A; IE = -100 µA",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "collector-base cut-off current",+ "symbol": "ICBO",+ "kind": "electrical",+ "unit": "nA",+ "min": null,+ "typ": -1,+ "max": -15,+ "conditions": "VCB = -30 V; IE = 0 A",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "collector-base cut-off current",+ "symbol": "ICBO",+ "kind": "electrical",+ "unit": "µA",+ "min": null,+ "typ": null,+ "max": -4,+ "conditions": "VCB = -30 V; IE = 0 A; Tj = 150 °C",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "emitter-base cut-off current",+ "symbol": "IEBO",+ "kind": "electrical",+ "unit": "nA",+ "min": null,+ "typ": null,+ "max": -100,+ "conditions": "VEB = -5 V; IC = 0 A",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "DC current gain (BC857A)",+ "symbol": "hFE",+ "kind": "electrical",+ "unit": "",+ "min": 125,+ "typ": null,+ "max": 250,+ "conditions": "VCE = -5 V; IC = -2 mA",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "collector-emitter saturation voltage",+ "symbol": "VCEsat",+ "kind": "electrical",+ "unit": "mV",+ "min": null,+ "typ": -75,+ "max": -300,+ "conditions": "IC = -10 mA; IB = -0.5 mA",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "collector-emitter saturation voltage",+ "symbol": "VCEsat",+ "kind": "electrical",+ "unit": "mV",+ "min": null,+ "typ": -250,+ "max": -650,+ "conditions": "IC = -100 mA; IB = -5 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.02",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "base-emitter saturation voltage",+ "symbol": "VBEsat",+ "kind": "electrical",+ "unit": "mV",+ "min": null,+ "typ": -700,+ "max": null,+ "conditions": "IC = -10 mA; IB = -0.5 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.02",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "base-emitter saturation voltage",+ "symbol": "VBEsat",+ "kind": "electrical",+ "unit": "mV",+ "min": null,+ "typ": -850,+ "max": null,+ "conditions": "IC = -100 mA; IB = -5 mA; pulsed; tp ≤ 300 µs; δ ≤ 0.02",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "base-emitter voltage",+ "symbol": "VBE",+ "kind": "electrical",+ "unit": "mV",+ "min": -600,+ "typ": -650,+ "max": -750,+ "conditions": "VCE = -5 V; IC = -2 mA",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "base-emitter voltage",+ "symbol": "VBE",+ "kind": "electrical",+ "unit": "mV",+ "min": null,+ "typ": null,+ "max": -820,+ "conditions": "VCE = -5 V; IC = -10 mA",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "transition frequency",+ "symbol": "fT",+ "kind": "electrical",+ "unit": "MHz",+ "min": 100,+ "typ": null,+ "max": null,+ "conditions": "VCE = -5 V; IC = -10 mA; f = 100 MHz",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "noise figure",+ "symbol": "NF",+ "kind": "electrical",+ "unit": "dB",+ "min": null,+ "typ": 2,+ "max": 10,+ "conditions": "IC = -200 µA; VCE = -5 V; RS = 2 kΩ; f = 1 kHz; B = 200 Hz",+ "source_page": 5,+ "source": "datasheet"+ }+ ] } }, "variants": [],@@ -191,4 +510,4 @@ "visibility": { "public": true }-}+}