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MPSA44

Public Made by Adom

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ST Semtech Bipolar (BJT), TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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MPSA44

ST Semtech · Bipolar (BJT) · TO-92

MPSA44 from ST Semtech, in a TO-92. 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 terminal of the TO-92 package; the datasheet gives emitter-base voltage VEBO as 6 V maximum and emitter-base cutoff current IEBO as 0.1 µA maximum at VEB = 4 V.
2 Base passive Base terminal of the TO-92 package; the datasheet gives base-emitter saturation voltage VBE(sat) as 0.75 V maximum at IC = 10 mA, IB = 1 mA.
3 C passive Collector terminal of the TO-92 package; the datasheet rates collector-base voltage VCBO at 500 V, collector-emitter voltage VCEO at 400 V and collector current IC at 300 mA.

Key specifications

Parameter Value
Manufacturer ST Semtech
Package TO-92
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 Voltage VCBO 500 V Ta = 25 °C 1
Collector Emitter Voltage VCEO 400 V Ta = 25 °C 1
Emitter Base Voltage VEBO 6 V Ta = 25 °C 1
Collector Current IC 300 mA Ta = 25 °C 1
Power Dissipation Ptot 625 mW Ta = 25 °C 1
Junction Temperature Tj 150 °C 1
Storage Temperature Range Tstg -55 150 °C 1
DC Current Gain hFE 40 VCE = 10 V, IC = 1 mA 1
DC Current Gain hFE 50 200 VCE = 10 V, IC = 10 mA 1
DC Current Gain hFE 45 VCE = 10 V, IC = 50 mA 1
Collector Base Cutoff Current ICBO 0.1 µA VCB = 400 V 1
Collector Emitter Cutoff Current ICEO 0.5 µA VCE = 400 V 1
Emitter Base Cutoff Current IEBO 0.1 µA VEB = 4 V 1
Collector Base Breakdown Voltage V(BR)CBO 500 V IC = 100 µA 1
Collector Emitter Breakdown Voltage V(BR)CEO 400 V IC = 1 mA 1
Emitter Base Breakdown Voltage V(BR)EBO 6 V IE = 100 µA 1
Collector Emitter Saturation Voltage VCE(sat) 0.4 V IC = 1 mA, IB = 0.1 mA 1
Collector Emitter Saturation Voltage VCE(sat) 0.5 V IC = 10 mA, IB = 1 mA 1
Collector Emitter Saturation Voltage VCE(sat) 0.75 V IC = 50 mA, IB = 5 mA 1
Base Emitter Saturation Voltage VBE(sat) 0.75 V IC = 10 mA, IB = 1 mA 1
Collector Output Capacitance Cob 7 pF VCB = 20 V, f = 1 MHz 1

CAD (KiCad official)

  • Symbol: MPSA44
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: mpsa44-etched.step / mpsa44-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mpsa44.step / mpsa44.glb are the bare package body.

Provenance

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

  • Datasheet: ST Semtech datasheet (2 pp, sha256 ed42b2899a543f7c, retrieved 2026-10-17, 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