component
BC857ALT1G
Public Made by Adomby adom
onsemi Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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bc857alt1g: specified limits as data (metadata.characteristics, 29 rows from the datasheet)
2 files changed
+392−1
README.md+36@@ -21,6 +21,42 @@ BC857ALT1G from onsemi, in a SOT-23. Pinout and pin descriptions extracted from | 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-Emitter Breakdown Voltage (BC857 series) | V(BR)CEO | -45 | | | V | IC = -10 mA | 2 |+| Collector-Emitter Breakdown Voltage (BC857A) | V(BR)CES | -50 | | | V | IC = -10 µA, VEB = 0 (as printed: IC = -10 A) | 2 |+| Collector-Base Breakdown Voltage (BC857 series) | V(BR)CBO | -50 | | | V | IC = -10 µA (as printed: IC = -10 A) | 2 |+| Emitter-Base Breakdown Voltage (BC857 series) | V(BR)EBO | -5 | | | V | IE = -1.0 µA (as printed: IE = -1.0 A) | 2 |+| Collector Cutoff Current | ICBO | | | -15 | nA | VCB = -30 V | 2 |+| Collector Cutoff Current | ICBO | | | -4 | µA | VCB = -30 V, TA = 150°C | 2 |+| Collector-Emitter Saturation Voltage | VCE(sat) | | | -0.3 | V | IC = -10 mA, IB = -0.5 mA | 2 |+| Collector-Emitter Saturation Voltage | VCE(sat) | | | -0.65 | V | IC = -100 mA, IB = -5.0 mA | 2 |+| Base-Emitter Saturation Voltage | VBE(sat) | | | -0.7 | V | IC = -10 mA, IB = -0.5 mA | 2 |+| Base-Emitter Saturation Voltage | VBE(sat) | | | -0.9 | V | IC = -100 mA, IB = -5.0 mA | 2 |+| Base-Emitter On Voltage | VBE(on) | -0.6 | | -0.75 | V | IC = -2.0 mA, VCE = -5.0 V | 2 |+| Base-Emitter On Voltage | VBE(on) | | | -0.82 | V | IC = -10 mA, VCE = -5.0 V | 2 |+| Current-Gain - Bandwidth Product | fT | 100 | | | MHz | IC = -10 mA, VCE = -5.0 Vdc, f = 100 MHz | 2 |+| Output Capacitance | Cob | | | 4.5 | pF | VCB = -10 V, f = 1.0 MHz | 2 |+| Noise Figure (BC857 series) | NF | | | 10 | dB | IC = -0.2 mA, VCE = -5.0 Vdc, RS = 2.0 k, f = 1.0 kHz, BW = 200 Hz | 2 |+| Collector-Emitter Voltage (BC857 series) | VCEO | | | -45 | V | Maximum Ratings, TA = 25°C | 1 |+| Collector-Base Voltage (BC857 series) | VCBO | | | -50 | V | Maximum Ratings, TA = 25°C | 1 |+| Emitter-Base Voltage | VEBO | | | -5 | V | Maximum Ratings, TA = 25°C | 1 |+| Collector Current - Continuous | IC | | | -100 | mAdc | Maximum Ratings, TA = 25°C | 1 |+| Collector Current - Peak | IC | | | -200 | mAdc | Maximum Ratings, TA = 25°C | 1 |+| Junction and Storage Temperature | TJ, Tstg | -55 | | 150 | °C | | 1 |+| Total Device Dissipation, FR-5 Board | PD | | | 225 | mW | FR-5 board (Note 1), TA = 25°C | 1 |+| Derate above 25°C, FR-5 Board | PD | | | 1.8 | mW/°C | FR-5 board (Note 1), derate above 25°C | 1 |+| Thermal Resistance, Junction-to-Ambient, FR-5 Board | RJA | | | 556 | °C/W | FR-5 board (Note 1) | 1 |+| Total Device Dissipation, Alumina Substrate | PD | | | 300 | mW | Alumina substrate (Note 2), TA = 25°C | 1 |+| Derate above 25°C, Alumina Substrate | PD | | | 2.4 | mW/°C | Alumina substrate (Note 2), derate above 25°C | 1 |+| Thermal Resistance, Junction-to-Ambient, Alumina Substrate | RJA | | | 417 | °C/W | Alumina substrate (Note 2) | 1 |+| Thermal Resistance, Junction-to-Ambient (transient-response note) | RJA | | | 200 | °C/W | Figure 14 SOA note: RJA = 200°C/W MAX | 5 |+| Thermal Resistance, Junction-to-Case (transient-response note) | RJC | | | 83.3 | °C/W | Figure 14 SOA note: RJC = 83.3°C/W MAX | 5 |+ ## CAD (KiCad official) - Symbol: `BC857ALT1G`
page.json+356−1@@ -150,6 +150,361 @@ "Package": "SOT-23", "Category": "Transistors/Thyristors", "Pins": "3"+ },+ "characteristics": {+ "version": 1,+ "source": "datasheet",+ "datasheet_sha256": "5b3358db41b73faa",+ "rows": [+ {+ "name": "Collector-Emitter Breakdown Voltage (BC857 series)",+ "symbol": "V(BR)CEO",+ "kind": "electrical",+ "unit": "V",+ "min": -45,+ "typ": null,+ "max": null,+ "conditions": "IC = -10 mA",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Collector-Emitter Breakdown Voltage (BC857A)",+ "symbol": "V(BR)CES",+ "kind": "electrical",+ "unit": "V",+ "min": -50,+ "typ": null,+ "max": null,+ "conditions": "IC = -10 µA, VEB = 0 (as printed: IC = -10 A)",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Collector-Base Breakdown Voltage (BC857 series)",+ "symbol": "V(BR)CBO",+ "kind": "electrical",+ "unit": "V",+ "min": -50,+ "typ": null,+ "max": null,+ "conditions": "IC = -10 µA (as printed: IC = -10 A)",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Emitter-Base Breakdown Voltage (BC857 series)",+ "symbol": "V(BR)EBO",+ "kind": "electrical",+ "unit": "V",+ "min": -5,+ "typ": null,+ "max": null,+ "conditions": "IE = -1.0 µA (as printed: IE = -1.0 A)",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Collector Cutoff Current",+ "symbol": "ICBO",+ "kind": "electrical",+ "unit": "nA",+ "min": null,+ "typ": null,+ "max": -15,+ "conditions": "VCB = -30 V",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Collector Cutoff Current",+ "symbol": "ICBO",+ "kind": "electrical",+ "unit": "µA",+ "min": null,+ "typ": null,+ "max": -4,+ "conditions": "VCB = -30 V, TA = 150°C",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Collector-Emitter Saturation Voltage",+ "symbol": "VCE(sat)",+ "kind": "electrical",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": -0.3,+ "conditions": "IC = -10 mA, IB = -0.5 mA",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Collector-Emitter Saturation Voltage",+ "symbol": "VCE(sat)",+ "kind": "electrical",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": -0.65,+ "conditions": "IC = -100 mA, IB = -5.0 mA",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Base-Emitter Saturation Voltage",+ "symbol": "VBE(sat)",+ "kind": "electrical",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": -0.7,+ "conditions": "IC = -10 mA, IB = -0.5 mA",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Base-Emitter Saturation Voltage",+ "symbol": "VBE(sat)",+ "kind": "electrical",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": -0.9,+ "conditions": "IC = -100 mA, IB = -5.0 mA",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Base-Emitter On Voltage",+ "symbol": "VBE(on)",+ "kind": "electrical",+ "unit": "V",+ "min": -0.6,+ "typ": null,+ "max": -0.75,+ "conditions": "IC = -2.0 mA, VCE = -5.0 V",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Base-Emitter On Voltage",+ "symbol": "VBE(on)",+ "kind": "electrical",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": -0.82,+ "conditions": "IC = -10 mA, VCE = -5.0 V",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Current-Gain - Bandwidth Product",+ "symbol": "fT",+ "kind": "electrical",+ "unit": "MHz",+ "min": 100,+ "typ": null,+ "max": null,+ "conditions": "IC = -10 mA, VCE = -5.0 Vdc, f = 100 MHz",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Output Capacitance",+ "symbol": "Cob",+ "kind": "electrical",+ "unit": "pF",+ "min": null,+ "typ": null,+ "max": 4.5,+ "conditions": "VCB = -10 V, f = 1.0 MHz",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Noise Figure (BC857 series)",+ "symbol": "NF",+ "kind": "electrical",+ "unit": "dB",+ "min": null,+ "typ": null,+ "max": 10,+ "conditions": "IC = -0.2 mA, VCE = -5.0 Vdc, RS = 2.0 k, f = 1.0 kHz, BW = 200 Hz",+ "source_page": 2,+ "source": "datasheet"+ },+ {+ "name": "Collector-Emitter Voltage (BC857 series)",+ "symbol": "VCEO",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": -45,+ "conditions": "Maximum Ratings, TA = 25°C",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Collector-Base Voltage (BC857 series)",+ "symbol": "VCBO",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": -50,+ "conditions": "Maximum Ratings, TA = 25°C",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Emitter-Base Voltage",+ "symbol": "VEBO",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": -5,+ "conditions": "Maximum Ratings, TA = 25°C",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Collector Current - Continuous",+ "symbol": "IC",+ "kind": "absolute_maximum",+ "unit": "mAdc",+ "min": null,+ "typ": null,+ "max": -100,+ "conditions": "Maximum Ratings, TA = 25°C",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Collector Current - Peak",+ "symbol": "IC",+ "kind": "absolute_maximum",+ "unit": "mAdc",+ "min": null,+ "typ": null,+ "max": -200,+ "conditions": "Maximum Ratings, TA = 25°C",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Junction and Storage Temperature",+ "symbol": "TJ, Tstg",+ "kind": "absolute_maximum",+ "unit": "°C",+ "min": -55,+ "typ": null,+ "max": 150,+ "conditions": "",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Total Device Dissipation, FR-5 Board",+ "symbol": "PD",+ "kind": "thermal",+ "unit": "mW",+ "min": null,+ "typ": null,+ "max": 225,+ "conditions": "FR-5 board (Note 1), TA = 25°C",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Derate above 25°C, FR-5 Board",+ "symbol": "PD",+ "kind": "thermal",+ "unit": "mW/°C",+ "min": null,+ "typ": null,+ "max": 1.8,+ "conditions": "FR-5 board (Note 1), derate above 25°C",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Thermal Resistance, Junction-to-Ambient, FR-5 Board",+ "symbol": "RJA",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": null,+ "max": 556,+ "conditions": "FR-5 board (Note 1)",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Total Device Dissipation, Alumina Substrate",+ "symbol": "PD",+ "kind": "thermal",+ "unit": "mW",+ "min": null,+ "typ": null,+ "max": 300,+ "conditions": "Alumina substrate (Note 2), TA = 25°C",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Derate above 25°C, Alumina Substrate",+ "symbol": "PD",+ "kind": "thermal",+ "unit": "mW/°C",+ "min": null,+ "typ": null,+ "max": 2.4,+ "conditions": "Alumina substrate (Note 2), derate above 25°C",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Thermal Resistance, Junction-to-Ambient, Alumina Substrate",+ "symbol": "RJA",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": null,+ "max": 417,+ "conditions": "Alumina substrate (Note 2)",+ "source_page": 1,+ "source": "datasheet"+ },+ {+ "name": "Thermal Resistance, Junction-to-Ambient (transient-response note)",+ "symbol": "RJA",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": null,+ "max": 200,+ "conditions": "Figure 14 SOA note: RJA = 200°C/W MAX",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Thermal Resistance, Junction-to-Case (transient-response note)",+ "symbol": "RJC",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": null,+ "max": 83.3,+ "conditions": "Figure 14 SOA note: RJC = 83.3°C/W MAX",+ "source_page": 5,+ "source": "datasheet"+ }+ ] } }, "variants": [],@@ -191,4 +546,4 @@ "visibility": { "public": true }-}+}