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UMA3N

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Changjing Digital Transistors, SOT-353. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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UMA3N

Changjing · Digital Transistors · SOT-353

UMA3N from Changjing, in a SOT-353. 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 B1 input Base of the first PNP transistor, entering through its built-in input resistor R1 (4.7 kΩ typ, 3.29-6.11 kΩ); VEBO limit is -5 V.
2 E passive Emitter pin shared by both PNP transistors (common emitter connection in the pinout diagram).
3 B2 input Base of the second PNP transistor, entering through its built-in input resistor R1 (4.7 kΩ typ, 3.29-6.11 kΩ); VEBO limit is -5 V.
4 C2 passive Collector of the second PNP transistor, rated VCEO -50 V and IC -100 mA continuous.
5 C1 passive Collector of the first PNP transistor, rated VCEO -50 V and IC -100 mA continuous.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-353
Category Transistors/Thyristors
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input resistor R1 3.29 4.7 6.11 KΩ 1
Collector-base breakdown voltage V(BR)CBO -50 V IC=-50μA,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=-50μA,IC=0 1
Collector cut-off current ICBO -0.5 μA VCB=-50V,IE=0 1
Emitter cut-off current IEBO 0.5 μA VEB=4V,IC=0 1
DC current gain hFE 100 600 VCE=-5V,IC=-1mA 1
Collector-emitter saturation voltage VCE(sat) -0.3 V IC=-5mA,IB=-0.25mA 1
Transition frequency fT 250 MHz VCE=-10V,IC=-5mA, f=100MHz 1
Collector-base voltage VCBO -50 V Ta=25℃ 1
Collector-emitter voltage VCEO -50 V Ta=25℃ 1
Emitter-base voltage VEBO -5 V Ta=25℃ 1
Collector current, continuous IC -100 mA Ta=25℃ 1
Collector dissipation PC 150 mW Ta=25℃ 1
Operation junction and storage temperature range TJ,Tstg -55 150 ℃ 1

CAD (KiCad official)

  • Symbol: UMA3N
  • Footprint: Package_TO_SOT_SMD:SOT-353_SC-70-5
  • 3D model: SOT-353 (KiCad packages3D, STEP)
  • 3D model files: uma3n-etched.step / uma3n-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); uma3n.step / uma3n.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (4 pp, sha256 c99faf26adc14245, retrieved 2026-10-17, tier: lcsc)
  • 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