component

2SC4177

Public Made by Adom

by adom

TWGMC Bipolar (BJT), SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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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 16d ago
viewers 2sc4177: viewers · Ray 16d ago
2sc4177-etched.glb 2sc4177: factory component page (tier=lcsc) · Ray 16d ago
2sc4177-etched.step 2sc4177: factory component page (tier=lcsc) · Ray 16d ago
2sc4177-hero.glb 2sc4177: hero GLB from the etched model (keeps the MPN mark) · Ray 16d ago
2sc4177-hero.overlay.json Publish 0.1.0 · Ray 16d ago
2sc4177.glb Publish 0.1.0 · Ray 16d ago
2sc4177.kicad_mod Publish 0.1.0 · Ray 16d ago
2sc4177.kicad_sym Publish 0.1.0 · Ray 16d ago
2sc4177.lbr Publish 0.1.0 · Ray 16d ago
2sc4177.step Publish 0.1.0 · Ray 16d ago
package.json Publish 0.1.0 · Ray 16d ago
page.json 2sc4177: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 10d ago
README.md 2sc4177: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 10d ago

2SC4177

TWGMC · Bipolar (BJT) · SOT-323

2SC4177 from TWGMC, in a SOT-323. 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 passive Base terminal of the NPN transistor, rated with emitter-base voltage VEBO of 5 V maximum and a base-emitter saturation voltage of 1 V maximum at IC=100 mA, IB=10 mA.
2 EMITTER passive Emitter terminal of the NPN transistor, with emitter-base breakdown voltage V(BR)EBO of 5 V at IE=100 µA.
3 COLLECTOR passive Collector terminal of the NPN transistor, rated at collector-emitter voltage VCEO of 50 V, collector-base voltage VCBO of 60 V and collector current IC of 100 mA.

Key specifications

Parameter Value
Manufacturer TWGMC
Package SOT-323
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-base breakdown voltage V(BR)CBO 60 V IC=100µA, IE=0 1
Collector-emitter breakdown voltage V(BR)CEO 50 V IC=1mA, IB=0 1
Emitter-base breakdown voltage V(BR)EBO 5 V IE=100µA, IC=0 1
Collector cut-off current ICBO 100 nA VCB=60V, IE=0 1
Emitter cut-off current IEBO 100 nA VEB=5V, IC=0 1
DC current gain hFE 90 600 VCE=6V, IC=1mA 1
Collector-emitter saturation voltage VCE(sat) 0.3 V IC=100mA, IB=10mA 1
Base-emitter saturation voltage VBE(sat) 1 V IC=100mA, IB=10mA 1
Base-emitter voltage VBE 0.55 0.65 V VCE=6V, IC=1mA 1
Transition frequency fT 250 MHz VCE=6V, IC=10mA 1
Collector output capacitance Cob 3 pF VCB=6V, IE=0, f=1MHz 1
Collector-base voltage VCBO 60 V 1
Collector-emitter voltage VCEO 50 V 1
Emitter-base voltage VEBO 5 V 1
Collector current IC 100 mA 1
Collector power dissipation PC 150 mW 1
Junction temperature Tj 150 ℃ 1
Storage temperature Tstg -55 150 ℃ 1
Thermal resistance, junction to ambient RθJA 833 ℃/W 1

CAD (KiCad official)

  • Symbol: 2SC4177
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323 (KiCad packages3D, STEP)
  • 3D model files: 2sc4177-etched.step / 2sc4177-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 2sc4177.step / 2sc4177.glb are the bare package body.

Provenance

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

  • Datasheet: TWGMC datasheet (3 pp, sha256 2e7c4cf49dd2b338, retrieved 2026-10-09, 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