component

TIP42B

Public Made by Adom

by adom

onsemi Bipolar Transistors - BJT, TO-220-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttriode-mos tube-transistortip42bfactory-2.0.0extractor-text

Verified TIP42B

by Ray · last 2 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

2 Nov 2026RayPublished by the parts factory: tier mfr, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: TIP42B · TO-220-3 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 5-page datasheet
  • ✓distributor: lcsc C3200976, digikey 2156-TIP42B-ON-ND, mouser 863-TIP42B
  • ✓family: TO-220-3_Vertical
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-7mf812ti/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
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ tip42b.kicad_sym✓ tip42b.kicad_mod✓ tip42b.step
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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

markdown

TIP42B

onsemi · Bipolar Transistors - BJT · TO-220-3

TIP42B from onsemi, in a TO-220-3. 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 datasheet gives a base current rating of -2 A (IB) as an absolute maximum.
2 Collector passive Collector terminal of the PNP transistor; the datasheet gives a collector current rating of -6 A DC and -10 A pulse (IC, ICP) as absolute maximums.
3 Emitter passive Emitter terminal of the PNP transistor; the datasheet gives an emitter-base voltage rating of -5 V (VEBO) as an absolute maximum.

Key specifications

Parameter Value
Manufacturer onsemi
Package TO-220-3
Category Triode/MOS Tube/Transistor
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 Sustaining Voltage (TIP42B) VCEO(sus) -80 V IC = -30mA, IB = 0 2
Collector Cut-off Current (TIP42B/42C) ICEO -0.7 mA VCE = -60V, IB = 0 2
Collector Cut-off Current (TIP42B) ICES -400 μA VCE = -80V, VEB = 0 2
Emitter Cut-off Current IEBO -1 mA VEB = -5V, IC = 0 2
DC Current Gain hFE 30 VCE = -4V, IC = -0.3A 2
DC Current Gain hFE 15 75 VCE = -4V, IC = -3A 2
Collector-Emitter Saturation Voltage VCE(sat) -1.5 V IC = -6A, IB = -600mA 2
Base-Emitter Saturation Voltage VBE(sat) -2 V VCE = -4V, IC = -6A 2
Current Gain Bandwidth Product fT 3 MHz VCE = -10V, IC = -500mA, f = 1MHz 2
Collector-Base Voltage (TIP42B) VCBO -80 V 1
Collector-Emitter Voltage (TIP42B) VCEO -80 V 1
Emitter-Base Voltage VEBO -5 V 1
Collector Current (DC) IC -6 A 1
Collector Current (Pulse) ICP -10 A 1
Base Current IB -2 A 1
Collector Dissipation PC 65 W TC=25°C 1
Collector Dissipation PC 2 W TA=25°C 1
Junction Temperature TJ 150 °C 1
Storage Temperature TSTG -65 150 °C 1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing PC IB Base Current -2 A PC Collector Dissipation (TC=25°C) 65 W 1

CAD (KiCad official)

  • Symbol: TIP42B
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220-3 (KiCad packages3D, STEP)
  • 3D model files: tip42b-etched.step / tip42b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tip42b.step / tip42b.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (5 pp, sha256 6de79efcef19d13b, retrieved 2026-11-02, tier: manufacturer)
  • 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