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ZUMT491

Public Made by Adom

by adom

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

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ZUMT491

Changjing · Bipolar (BJT) · SOT-323

ZUMT491 from Changjing, 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 input Base terminal of the NPN transistor; emitter-base voltage VEBO is rated 5 V max and V(BR)EBO is 5 V at IE=100µA.
2 EMITTER passive Emitter terminal of the NPN transistor; the datasheet's emitter-base limits and the 1 A continuous collector current rating are referenced to this pin.
3 COLLECTOR passive Collector terminal of the NPN transistor; rated VCBO 80 V, VCEO 60 V, continuous collector current IC 1 A, with collector power dissipation PC listed as 250 mW.

Key specifications

Parameter Value
Manufacturer Changjing
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 80 V IC=100µA,IE=0 1
Collector-emitter breakdown voltage V(BR)CEO 60 V IC=10mA,IB=0 1
Emitter-base breakdown voltage V(BR)EBO 5 V IE=100µA,IC=0 1
Collector cut-off current ICBO 0.1 μA VCB=60V,IE=0 1
Emitter cut-off current IEBO 0.1 μA VEB=4V,IC=0 1
DC current gain hFE(1) 100 VCE=5V, IC=1mA 1
DC current gain hFE(2) * 100 300 VCE=5V, IC=500mA 1
DC current gain hFE(3) * 80 VCE=5V, IC=1A 1
DC current gain hFE(4) * 30 VCE=5V, IC=2A 1
Collector-emitter saturation voltage VCE(sat)1 * 0.25 V IC=500mA,IB=50mA 1
Collector-emitter saturation voltage VCE(sat)2 * 0.5 V IC=1A,IB=100mA 1
Base emitter saturation voltage VBE(sat) * 1.1 V IC=1A, IB=100mA 1
Base emitter turn on voltage VBE(on) * 1 V VCE=5V,IC=1A 1
Transition frequency fT 150 MHz VCE=10V, IC=50mA,f=100MHz 1
Collector output capacitance Cob 10 pF VCB=10V,IE=0,f=1MHz 1
Collector-Base Voltage VCBO 80 V 1
Collector-Emitter Voltage VCEO 60 V 1
Emitter-Base Voltage VEBO 5 V 1
Collector Current IC 1 A 1
Collector Power Dissipation PC 250 mW 1
Thermal Resistance From Junction To ambient RθJA 500 ℃/W 1
Operation Junction and Storage Temperature Range TJ,Tstg -55 150 ℃ 1

CAD (KiCad official)

  • Symbol: ZUMT491
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323 (KiCad packages3D, STEP)
  • 3D model files: zumt491-etched.step / zumt491-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); zumt491.step / zumt491.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (3 pp, sha256 be1e19f29077a7d8, 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