component

LBC857CWT1G

Public Made by Adom

by adom

LRC Bipolar (BJT), SC-70. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttransistors-thyristorslbc857cwt1gfactory-2.0.0extractor-text

Verified LBC857CWT1G

by Ray · last 6 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

6 Nov 2026RayPublished by the parts factory: tier lcsc, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: LBC857CWT1G · SC-70 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 6-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOT-323_SC-70
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-blzq7gc0/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ lbc857cwt1g.kicad_sym✓ lbc857cwt1g.kicad_mod✓ lbc857cwt1g.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 6h ago
viewers lbc857cwt1g: viewers · Ray 6h ago
lbc857cwt1g-etched.glb Publish 0.1.0 · Ray 6h ago
lbc857cwt1g-etched.step lbc857cwt1g: factory component page (tier=lcsc) · Ray 6h ago
lbc857cwt1g-hero.glb lbc857cwt1g: hero GLB from the etched model (keeps the MPN mark) · Ray 6h ago
lbc857cwt1g-hero.overlay.json Publish 0.1.0 · Ray 6h ago
lbc857cwt1g.glb Publish 0.1.0 · Ray 6h ago
lbc857cwt1g.kicad_mod Publish 0.1.0 · Ray 6h ago
lbc857cwt1g.kicad_sym Publish 0.1.0 · Ray 6h ago
lbc857cwt1g.lbr Publish 0.1.0 · Ray 6h ago
lbc857cwt1g.step Publish 0.1.0 · Ray 6h ago
package.json Publish 0.1.0 · Ray 6h ago
page.json Set visibility: public · Ray 6h ago
README.md Publish 0.1.0 · Ray 6h ago
verification.json Verified: Published by the parts factory: tier lcsc, 3 pins · Ray 6h ago

LBC857CWT1G

LRC · Bipolar (BJT) · SC-70

LBC857CWT1G from LRC, in a SC-70. 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 BASE input Base terminal of the PNP transistor; the BC857 series limits are VEBO -5.0 V and continuous collector current IC -100 mA.
2 EMITTER passive Emitter terminal; emitter-base breakdown voltage V(BR)EBO is specified at -5.0 V minimum (IE = -1.0 µA).
3 COLLECTOR passive Collector terminal; the BC857 series limits are VCEO -45 V and VCBO -50 V, with continuous collector current IC -100 mA.

Key specifications

Parameter Value
Manufacturer LRC
Package SC-70
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 Cutoff Current ICBO -15 nA VCB = -30 V 1
Collector Cutoff Current ICBO -4 µA VCB = -30 V, TA = 150°C 1
Collector-Emitter Breakdown Voltage V(BR)CEO -45 V IC = -10 mA 1
Collector-Emitter Breakdown Voltage V(BR)CES -50 V IC = -10 µA, VEB = 0 1
Collector-Base Breakdown Voltage V(BR)CBO -50 V IC = -10 µA 1
Emitter-Base Breakdown Voltage V(BR)EBO -5 V IE = -1.0 µA 1
DC Current Gain (grade C) hFE 420 520 800 IC = -2.0 mA, VCE = -5.0 V 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 Voltage VBE(on) -0.6 -0.75 V IC = -2.0 mA, VCE = -5.0 V 2
Base-Emitter 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 NF 10 dB IC = -0.2 mA, VCE = -5.0 Vdc, RS = 2.0 kΩ, f = 1.0 kHz, BW = 200 Hz 2
Collector Current, Continuous IC -100 mAdc 1
Collector-Emitter Voltage VCEO -45 V 1
Collector-Base Voltage VCBO -50 V 1
Emitter-Base Voltage VEBO -5 V 1
Junction and Storage Temperature TJ, Tstg -55 150 °C 1
Total Device Dissipation PD 150 mW FR-5 board, TA = 25°C 1
Thermal Resistance, Junction to Ambient RθJA 833 °C/W 1
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

CAD (KiCad official)

  • Symbol: LBC857CWT1G
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SC-70 (KiCad packages3D, STEP)
  • 3D model files: lbc857cwt1g-etched.step / lbc857cwt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lbc857cwt1g.step / lbc857cwt1g.glb are the bare package body.

Provenance

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

  • Datasheet: LRC datasheet (6 pp, sha256 09bc35c0e15f266b, retrieved 2026-11-06, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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