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2SC4081FRAT106R

Public Made by Adom

by adom

ROHM Semicon Bipolar Transistors - BJT, SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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2SC4081FRAT106R

ROHM Semicon · Bipolar Transistors - BJT · SOT-323

2SC4081FRAT106R from ROHM Semicon, 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 Emitter passive Emitter of the NPN transistor; emitter-base voltage VEBO max 7 V and emitter cut-off current IEBO max 100 nA at VEB = 7 V.
2 Base input Base of the NPN transistor; collector-emitter saturation voltage is max 400 mV at IC = 50 mA, IB = 5 mA.
3 Collector passive Collector of the NPN transistor; VCBO 60 V, VCEO 50 V, IC 150 mA continuous and 200 mA peak (Pw = 1 ms, single pulse).

Key specifications

Parameter Value
Manufacturer ROHM Semicon
Package SOT-323
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 60 V Ta = 25°C 2
Collector-emitter voltage VCEO 50 V Ta = 25°C 2
Emitter-base voltage VEBO 7 V Ta = 25°C 2
Collector current IC 150 mA Ta = 25°C 2
Collector current (pulse) ICP 200 mA Pw=1ms, Single Pulse 2
Power dissipation PD 200 mW Each terminal mounted on a reference land 2
Junction temperature Tj 150 ℃ 2
Range of storage temperature Tstg -55 150 ℃ 2
Collector-base breakdown voltage BVCBO 60 V IC = 50μA 2
Collector-emitter breakdown voltage BVCEO 50 V IC = 1mA 2
Emitter-base breakdown voltage BVEBO 7 V IE = 50μA 2
Collector cut-off current ICBO 100 nA VCB = 60V 2
Emitter cut-off current IEBO 100 nA VEB = 7V 2
Collector-emitter saturation voltage VCE(sat) 400 mV IC = 50mA, IB = 5mA 2
DC current gain hFE 120 560 - VCE = 6V, IC = 1mA 2
Output capacitance Cob 2 3.5 pF VCB = 12V, IE = 0A, f = 1MHz 2
Transition frequency fT 180 MHz VCE = 12V, IE = -2mA, f = 100MHz 2

CAD (KiCad official)

  • Symbol: 2SC4081FRAT106R
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323 (KiCad packages3D, STEP)
  • 3D model files: 2sc4081frat106r-etched.step / 2sc4081frat106r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 2sc4081frat106r.step / 2sc4081frat106r.glb are the bare package body.

Provenance

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

  • Datasheet: ROHM Semicon datasheet (9 pp, sha256 37cb53c15e5ff793, retrieved 2026-10-27, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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