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FCX591ATA

Public Made by Adom

by adom

Diodes Incorporated Bipolar (BJT), SOT-89. 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

Schematic Symbol

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PCB Footprint

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Datasheet

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Contents

README

markdown

FCX591ATA

Diodes Incorporated · Bipolar (BJT) · SOT-89

FCX591ATA from Diodes Incorporated, in a SOT-89. 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 PNP transistor; the pinout drawing shows it as the third lead from the top, opposite the emitter, with Vebo limited to -7V and peak base current IB of -200mA.
2 C passive Collector of the PNP transistor, the middle lead, which is common with the exposed collector tab, rated for VCEO of -40V, continuous IC of -1A and peak ICM of -2A.
3 E passive Emitter of the PNP transistor; the pinout drawing shows it as the top lead, and the emitter-base voltage is limited to -7V.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-89
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 -40 V IC = -100µA 4
Collector-Emitter Breakdown Voltage BVCEO -40 V IC = -10mA 4
Emitter-Base Breakdown Voltage BVEBO -7 V IE = -100µA 4
Collector Cutoff Current ICBO -100 nA VCB = -30V 4
Emitter Cutoff Current IEBO -100 nA VEB = -4V 4
DC Current Transfer Static Ratio hFE 300 IC = -1mA, VCE = -5V 4
DC Current Transfer Static Ratio hFE 250 IC = -500mA, VCE = -5V 4
DC Current Transfer Static Ratio hFE 160 IC = -1A, VCE = -5V 4
DC Current Transfer Static Ratio hFE 30 IC = -2A, VCE = -5V 4
Collector-Emitter Saturation Voltage VCE(sat) -0.2 V IC = -100mA, IB = -1mA 4
Collector-Emitter Saturation Voltage VCE(sat) -0.35 V IC = -500mA, IB = -20mA 4
Collector-Emitter Saturation Voltage VCE(sat) -0.5 V IC = -1A, IB = -100mA 4
Base-Emitter Saturation Voltage VBE(sat) -1.1 V IC = -1A, IB = -50mA 4
Base-Emitter Turn-On Voltage VBE(on) -1 V IC = -1A, VCE = -5V 4
Transitional Frequency fT 150 MHz IE = -50mA, VCE = -10V, f = 100MHz 4
Output Capacitance Cobo 10 pF VCB = -10V, f = 1MHz 4
Collector-Base Voltage VCBO -40 V TA = +25°C 2
Collector-Emitter Voltage VCEO -40 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
Peak Base Current IB -200 mA TA = +25°C 2
Operating and Storage Temperature Range TJ, TSTG -65 150 °C 2
Power Dissipation PD 1 W Note 5: surface mounted on 15mm X 15mm FR4 PCB, high coverage single sided 1 oz copper, still air, steady state 2
Thermal Resistance, Junction to Ambient Air RθJA 125 C/W Note 5: surface mounted on 15mm X 15mm FR4 PCB, still air 2
Thermal Resistance, Junction to Leads RθJL 10.01 C/W Note 6: junction to solder-point (on the exposed collector pad) 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: FCX591ATA
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: fcx591ata-etched.step / fcx591ata-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fcx591ata.step / fcx591ata.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (7 pp, sha256 383980c6f0331501, 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