component
BC857B-QR
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
Publish 0.1.1
4 files changed
+515−13
bc857b-qr-hero.glbadded⋯ 1 unchanged line ⋯
bc857b-qr-hero.overlay.jsonadded+150@@ -0,0 +1,150 @@+{+ "spec": "adom-hero 1.4",+ "mpn": "BC857B-QR",+ "kind": "component + footprint reference art",+ "board_use": false,+ "plane_z_mm": -0.02,+ "units": "metre",+ "upAxis": "Z",+ "layers": {+ "pad_outlines": {+ "material": "Footprint pads - teal dashed outlines - 50 percent opacity",+ "rgba": [+ 0.0,+ 0.902,+ 0.863,+ 0.5+ ],+ "pads": 3,+ "span_mm": 3.35,+ "dash_mm": 0.12,+ "gap_mm": 0.072,+ "pad_stroke_mm": 0.03+ },+ "silkscreen": {+ "material": "Silkscreen reference lines - 30 percent opacity",+ "rgba": [+ 0.92,+ 0.96,+ 1.0,+ 0.3+ ],+ "footprint_items": 8,+ "pin1": {+ "source": "footprint silkscreen",+ "pad": "1"+ }+ },+ "signal_names": {+ "material": "Signal names - 50 percent opacity",+ "rgba": [+ 0.92,+ 0.96,+ 1.0,+ 0.5+ ],+ "font": "DejaVu Sans Mono",+ "labels": 3,+ "sides": "top + mirrored underside (single-sided)",+ "fallback_to_pad_number": 0+ }+ },+ "align": {+ "ok": true,+ "centre_offset_mm": 0.0,+ "tolerance_mm": 0.268,+ "orientation_flipped": false,+ "contacts_bbox_mm": [+ -1.25,+ 1.25,+ -1.15,+ 1.15+ ],+ "pads_bbox_mm": [+ -1.675,+ 1.675,+ -1.25,+ 1.25+ ],+ "seating_z_mm": 0.0+ },+ "sources": {+ "glb": "bc857b-qr-etched.glb",+ "glb_sha256": "08eed5be9878bd7456ba173bc2423dfad17612ba6ab95bb9bf826c087dbc27e5",+ "footprint": "bc857b-qr.kicad_mod",+ "footprint_sha256": "0d88c86c1b6d8c1aae4aa8c09386264c089d4451a128b6ccd63ed253f4300b15",+ "pins": "page.json component.pins",+ "pins_sha256": "88adb3a0114ad14a942771aca00eb966ca13853032d242cc20c4a52aff3d07c8"+ },+ "generator": "adom-wiki 1.8.24 (component_hero)",+ "labels": [+ {+ "pad": "1",+ "text": "B",+ "x": -1.825,+ "y": -0.95,+ "align": "right",+ "vertical": false,+ "h": 0.6+ },+ {+ "pad": "2",+ "text": "E",+ "x": -1.825,+ "y": 0.95,+ "align": "right",+ "vertical": false,+ "h": 0.6+ },+ {+ "pad": "3",+ "text": "C",+ "x": 1.825,+ "y": 0.0,+ "align": "left",+ "vertical": false,+ "h": 0.6+ }+ ],+ "pads": [+ {+ "number": "1",+ "shape": "roundrect",+ "center_mm": [+ -0.9375,+ -0.95+ ],+ "size_mm": [+ 1.475,+ 0.6+ ],+ "rot": 0.0+ },+ {+ "number": "2",+ "shape": "roundrect",+ "center_mm": [+ -0.9375,+ 0.95+ ],+ "size_mm": [+ 1.475,+ 0.6+ ],+ "rot": 0.0+ },+ {+ "number": "3",+ "shape": "roundrect",+ "center_mm": [+ 0.9375,+ 0.0+ ],+ "size_mm": [+ 1.475,+ 0.6+ ],+ "rot": 0.0+ }+ ]+}
package.json+352−3@@ -1,6 +1,6 @@ { "slug": "bc857b-qr",- "version": "0.1.0",+ "version": "0.1.1", "type": "component", "description": "Nexperia Bipolar (BJT), SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.", "tags": [@@ -26,7 +26,10 @@ "docs/hero.png", "docs/bc857b-qr-datasheet.pdf", "viewers/symbol.html",- "viewers/footprint.html"+ "viewers/footprint.html",+ "bc857b-qr-etched.step",+ "bc857b-qr-hero.glb",+ "bc857b-qr-hero.overlay.json" ], "component": { "mpn": "BC857B-QR",@@ -141,5 +144,351 @@ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)" } ]- }+ },+ "title": "BC857B-QR",+ "brief": "Nexperia Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "metadata": {+ "specs": {+ "Manufacturer": "Nexperia",+ "Package": "SOT-23",+ "Category": "Transistors/Thyristors",+ "Pins": "3"+ },+ "characteristics": {+ "version": 1,+ "source": "datasheet",+ "datasheet_sha256": "51197e747b27e7b9",+ "rows": [+ {+ "name": "collector-base voltage",+ "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",+ "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; device mounted on FR4 PCB [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; device mounted on FR4 PCB, single-sided, 35 µm copper [1]",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "collector-base breakdown voltage",+ "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",+ "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",+ "symbol": "hFE",+ "kind": "electrical",+ "unit": "",+ "min": 220,+ "typ": null,+ "max": 475,+ "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 [1]",+ "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"+ },+ {+ "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 [1]",+ "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 [1]",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "collector capacitance",+ "symbol": "Cc",+ "kind": "electrical",+ "unit": "pF",+ "min": null,+ "typ": 4.5,+ "max": null,+ "conditions": "VCB = -10 V; IE = ie = 0 A; f = 1 MHz",+ "source_page": 5,+ "source": "datasheet"+ }+ ]+ }+ },+ "discovery_triggers": [+ "bc857b-qr"+ ],+ "discovery_pitch": "BC857B-QR (Nexperia) component page with datasheet-verified CAD.",+ "visibility": "public" }
page.json+13−10@@ -4,7 +4,7 @@ "slug": "bc857b-qr", "title": "BC857B-QR", "brief": "Nexperia Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",- "version": "0.1.0",+ "version": "0.1.1", "license": "CC-BY-SA-4.0", "tags": [ "component",@@ -115,11 +115,11 @@ "seat": "z = 0", "extents_mm": [ 2.5,- 3.0,+ 3, 1.2 ],- "zmin_mm": 0.0,- "centre_offset_mm": 0.0,+ "zmin_mm": 0,+ "centre_offset_mm": 0, "footprint_binding": "identity", "sha256": "4366722f81f66f2ed9c1c14ae70f90704aaef31551caeb2e2425c5012125a31e", "checked": "2026-11-13",@@ -497,10 +497,13 @@ "docs/hero.png", "docs/bc857b-qr-datasheet.pdf", "viewers/symbol.html",- "viewers/footprint.html"+ "viewers/footprint.html",+ "bc857b-qr-etched.step",+ "bc857b-qr-hero.glb",+ "bc857b-qr-hero.overlay.json" ],- "visibility": {- "public": true- },- "updated_at": "2026-09-24T17:39:23.675Z"-}+ "visibility": "public",+ "updated_at": "2026-09-24T17:39:23.675Z",+ "description": "Nexperia Bipolar (BJT), SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "org": "adom"+}