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FMMT493ATA

Public Made by Adom

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

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FMMT493ATA

Diodes Incorporated · Bipolar (BJT) · SOT-23

FMMT493ATA from Diodes Incorporated, 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 B input Base of the NPN transistor; the datasheet's Pin-Out view labels it B but prints no pin number.
2 E passive Emitter of the NPN transistor; the datasheet's Pin-Out view labels it E but prints no pin number.
3 C passive Collector of the NPN transistor, on the single-lead side of the package, rated VCEO 60 V and IC 1 A continuous (2 A peak).

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
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 BVCBO 120 V IC = 100µA 4
Collector-Emitter Breakdown Voltage BVCEO 60 V IC = 10mA 4
Emitter-Base Breakdown Voltage BVEBO 7 V IE = 100µA 4
Collector Cutoff Current ICBO 100 nA VCB = 45V 4
Emitter Cutoff Current IEBO 100 nA VEB = 4V 4
Collector Emitter Cutoff Current ICES 100 nA VCE = 45V 4
Static Forward Current Transfer Ratio hFE 300 IC = 1mA, VCE = 10V 4
Static Forward Current Transfer Ratio hFE 500 IC = 150mA, VCE = 10V 4
Static Forward Current Transfer Ratio hFE 300 1200 IC = 250mA, VCE = 10V 4
Static Forward Current Transfer Ratio hFE 100 IC = 500mA, VCE = 10V 4
Static Forward Current Transfer Ratio hFE 20 IC = 1A, VCE = 10V 4
Collector-Emitter Saturation Voltage VCE(SAT) 250 mV IC = 500mA, IB = 50mA 4
Collector-Emitter Saturation Voltage VCE(SAT) 500 mV IC = 1A, IB = 100mA 4
Base-Emitter Turn-On Voltage VBE(ON) 1 V IC = 1A, VCE = 10V 4
Base-Emitter Saturation Voltage VBE(SAT) 1.15 V IC = 1A, IB = 100mA 4
Output Capacitance Cobo 10 pF VCB = 10V, f = 1MHz 4
Transition Frequency fT 150 MHz VCE = 10V, IC = 50mA, f = 100MHz 4
Collector-Base Voltage VCBO 120 V TA = +25°C 2
Collector-Emitter Voltage VCEO 60 V TA = +25°C 2
Emitter-Base Voltage VEBO 7 V TA = +25°C 2
Continuous Collector Current IC 1 A TA = +25°C 2
Peak Pulse Current ICM 2 A TA = +25°C 2
Base Current IB 200 mA TA = +25°C 2
Power Dissipation PD 500 mW TA = +25°C; Note 5 (15mm x 15mm FR-4, 1oz Cu) 2
Thermal Resistance, Junction to Ambient RθJA 250 °C/W Note 5 (15mm x 15mm FR-4, 1oz Cu, still air) 2
Thermal Resistance, Junction to Lead RθJL 197 °C/W Note 6 (junction to solder point at end of collector lead) 2
Operating and Storage Temperature Range TJ, TSTG -55 150 °C 2
Electrostatic Discharge - Human Body Model ESD HBM 4000 V JEDEC Class 3A (JESD22-A114) 2
Electrostatic Discharge - Machine Model ESD MM 400 V JEDEC Class C (JESD22-A115) 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin  Terminals: Finish, Matte Tin Plated Leads. Solderable per MIL-STD-202, Method 208 1

CAD (KiCad official)

  • Symbol: FMMT493ATA
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: fmmt493ata-etched.step / fmmt493ata-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fmmt493ata.step / fmmt493ata.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (7 pp, sha256 dbea400800df4034, retrieved 2026-10-18, 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