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C945-MS

Public Made by Adom

by adom

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

componenttransistors-thyristorsc945-msfactory-2.0.0extractor-text
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Contents

README

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C945-MS

MSKSEMI · Bipolar (BJT) · SOT-23

C945-MS from MSKSEMI, in a SOT-23. 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 NPN transistor; the datasheet gives VEBO 5 V maximum and VBE(sat) 1 V maximum at IC=100 mA, IB=10 mA.
2 EMITTER passive Emitter terminal of the NPN transistor; the datasheet gives VEBO 5 V and an emitter-base breakdown voltage V(BR)EBO of 5 V at IE=0.1 mA.
3 COLLECTOR passive Collector terminal of the NPN transistor; the datasheet gives VCBO 60 V, VCEO 50 V, IC 150 mA and PC 200 mW as maximum ratings.

Key specifications

Parameter Value
Manufacturer MSKSEMI
Package SOT-23
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=100uA, IE=0 2
Collector-emitter breakdown voltage V(BR)CEO 50 V IC=1mA, IB=0 2
Emitter-base breakdown voltage V(BR)EBO 5 V IE=0.1mA, IC=0 2
Collector cut-off current ICBO 0.1 uA VCB=60V, IE=0 2
Emitter cut-off current IEBO 0.1 uA VEB=5V, IC=0 2
DC current gain hFE(1) 130 400 VCE=6 V, IC=1mA 2
DC current gain hFE(2) 40 VCE=6 V, IC=0.1mA 2
Collector-emitter saturation voltage VCE(sat) 0.3 V IC=100mA, IB=10mA 2
Base-emitter saturation voltage VBE(sat) 1 V IC=100mA, IB=10mA 2
Transition frequency fT 150 MHz VCE=6V,IC=10mA,f=30 MHz 2
Collector output capacitance Cob 3 pF VCB=10V,IE=0,f=1MHZ 2
Noise figure NF 4 10 dB VCE=6V,IC=0.1mA, Rg=10kΩ,f=1kMHZ 2
Collector-emitter voltage VCBO 60 V Ta=25℃ 2
Collector-emitter voltage VCEO 50 V Ta=25℃ 2
Emitter-base voltage VEBO 5 V Ta=25℃ 2
Collector current IC 150 mA Ta=25℃ 2
Collector power dissipation PC 200 mW Ta=25℃ 2
Junction temperature TJ 150 ℃ 2
Storage temperature Tstg -55 150 ℃ 2

CAD (KiCad official)

  • Symbol: C945-MS
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: c945-ms-etched.step / c945-ms-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); c945-ms.step / c945-ms.glb are the bare package body.

Provenance

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

  • Datasheet: MSKSEMI datasheet (5 pp, sha256 bfe15be1230ced6e, retrieved 2026-10-18, 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