component

BC858CMTF

Public Made by Adom

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onsemi Bipolar Transistors - BJT, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttransistorsbc858cmtffactory-2.0.0extractor-text

Verified BC858CMTF

by Ray · last 13 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

13 Nov 2026RayPublished by the parts factory: tier mfr, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • •array (skip): not an array of element pairs
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: BC858CMTF · SOT-23 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 7-page datasheet
  • ✓distributor: lcsc C184403, digikey 2832-BC858CMTFTR-ND, mouser 512-BC858CMTF
  • ✓family: SOT-23
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-x0cn5g55/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.5)
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓symbol_text: no pin names collide
  • ✓viewers: viewers/footprint.html 17 kB, viewers/symbol.html 7 kB
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ bc858cmtf.kicad_sym✓ bc858cmtf.kicad_mod✓ bc858cmtf.step
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BC858CMTF

onsemi · Bipolar Transistors - BJT · SOT-23

BC858CMTF from onsemi, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model). Symbol and footprint from KiCad-official CAD; the 3D model is generated from the datasheet's package dimensions.

Pinout

Pin Name Type Function
1 Base input Base of the PNP transistor; the datasheet lists Emitter-Base voltage max of -5 V and DC collector current max of -100 mA.
2 Emitter passive Emitter of the PNP transistor, pin 2 per the SOT-23 pin definitions in the ordering table.
3 Collector passive Collector of the PNP transistor; BC858 has Collector-Emitter voltage max of -30 V and Collector-Base voltage max of -30 V, with 310 mW collector power dissipation.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOT-23
Category Transistors
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 VCBO -30 V BC858/859 2
Collector-Emitter Voltage VCEO -30 V BC858/859 2
Emitter-Base Voltage VEBO -5 V 2
Collector Current (DC) IC -100 mA 2
Collector Power Dissipation PC 310 mW Ta=25°C 2
Junction Temperature TJ 150 °C 2
Storage Temperature TSTG -65 150 °C 2
Collector Cut-off Current ICBO -15 nA VCB=-30V, IE=0 2
DC Current Gain (class C) hFE 420 800 VCE=-5V, IC=-2mA; classification C 3
Collector-Emitter Saturation Voltage VCE(sat) -90 -250 mV IC=-10mA, IB=-0.5mA 2
Collector-Emitter Saturation Voltage VCE(sat) -300 -650 mV IC=-100mA, IB=-5mA 2
Base-Emitter On Voltage VBE(on) -600 -660 -750 mV VCE=-5V, IC=-2mA 2
Base-Emitter On Voltage VBE(on) -800 mV VCE=-5V, IC=-10mA 2
Noise Figure NF 2 10 dB VCE=-5V, IC=-200µA, RG=2KΩ, f=1KHz; BC856/857/858 2
Base-Emitter Saturation Voltage VBE(sat) -700 mV IC=-10mA, IB=-0.5mA 2
Base-Emitter Saturation Voltage VBE(sat) -900 mV IC=-100mA, IB=-5mA 2
Current Gain Bandwidth Product fT 150 MHz VCE=-5V, IC=-10mA, f=100MHz 2
Output Capacitance Cob 6 pF VCB=-10V, IE=0, f=1MHz 2

CAD (land: KiCad; 3D: generated from the datasheet)

  • Symbol: BC858CMTF
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23, generated on the KiCad land (body 1.3 x 2.9 mm, terminals on the pads, 1.0499999999999998 mm tall, datasheet A, midpoint of min and max). KiCad's stock model for this land is taller than the datasheet allows, so the model is generated from the datasheet drawing; the dimensions come from the datasheet drawing where it was read and are defaults otherwise (see provenance.model_3d_generated), not the manufacturer's CAD (STEP)
  • 3D model files: bc858cmtf-etched.step / bc858cmtf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bc858cmtf.step / bc858cmtf.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (7 pp, sha256 efea6827baea1f4c, retrieved 2026-11-13, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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: land: KiCad official libraries (CC-BY-SA 4.0); 3D: generated from the datasheet's package dimensions (provenance.model_3d_generated).

Datasheet PDF