component

ZTX558

Public Made by Adom

by adom

Diodes Incorporated Bipolar Transistors - BJT, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ZTX558

Diodes Incorporated · Bipolar Transistors - BJT · TO-92

ZTX558 from Diodes Incorporated, 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 C passive Collector; rated VCEO -400V and IC -200mA continuous.
2 B passive Base; emitter-base voltage limited to VEBO -5V.
3 E passive Emitter of the PNP transistor; the emitter-base breakdown voltage is -5V minimum.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
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 Breakdown Voltage BVCBO -400 V IC = -100µA 4
Collector-Emitter Breakdown Voltage BVCEO -400 V IC = -10mA 4
Emitter-Base Breakdown Voltage BVEBO -5 V IE = -100µA 4
DC Current Gain hFE 100 VCE = -10V, IC = -1mA 4
DC Current Gain hFE 15 VCE = -10V, IC = -100mA 4
DC Current Gain hFE 300 4
Collector-Emitter Saturation Voltage VCE(sat) -0.2 V IC = -20mA, IB = -2mA 4
Collector-Emitter Saturation Voltage VCE(sat) -0.5 V IC = -50mA, IB = -6mA 4
Base-Emitter Saturation Voltage VBE(sat) -0.9 V IC = -50mA, IB = -5mA 4
Base-Emitter Turn-On Voltage VBE(on) -0.9 V IC = -50mA, VCE = -10V 4
Collector-Cutoff Current ICBO -100 nA VCB = -320V 4
Emitter-Cutoff Current IEBO -100 nA VEB = -4V 4
Current Gain-Bandwidth Product fT 50 MHz VCE = -20V, IC = -10mA, f = 20MHz 4
Output Capacitance COBO 5 pF VCB = -20V, f = 1MHz 4
Switching Time (turn-on) ton 95 ns IC = -50mA, VC = -100V, IB1 = 5mA, IB2 = -10mA 4
Switching Time (turn-off) toff 1600 ns IC = -50mA, VC = -100V, IB1 = 5mA, IB2 = -10mA 4
Collector-Base Voltage VCBO -400 V 2
Collector-Emitter Voltage VCEO -400 V 2
Emitter-Base Voltage VEBO -5 V 2
Collector Current IC -200 mA 2
Power Dissipation PD 1.5 W Note 5: through-hole at seating plane, 2.5mm lead length, collector lead on 25mm × 25mm 1oz copper, still air 2
Power Dissipation PD 1 W Note 6: minimum recommended pad layout, 12mm lead length 2
Thermal Resistance Junction to Ambient RθJA 116 °C/W Note 5 2
Thermal Resistance Junction to Ambient RθJA 175 °C/W Note 6 2
Thermal Resistance Junction to Lead RθJL 63.75 °C/W Note 7: junction to solder-point at seating plane, 2.5mm from bottom of package 2
Operating and Storage Temperature Range TJ, TSTG -55 200 °C 2
Electrostatic Discharge - Human Body Model ESD HBM 4000 V JEDEC Class 3A 2
Electrostatic Discharge - Machine Model ESD MM 400 V JEDEC Class C 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: ZTX558
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: ztx558-etched.step / ztx558-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ztx558.step / ztx558.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (7 pp, sha256 607afa207af7b13a, retrieved 2026-10-24, tier: manufacturer)
  • 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