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FMMT458TA

Public Made by Adom

by adom

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

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs fmmt458ta: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers fmmt458ta: viewers · Ray 1mo ago
fmmt458ta-etched.fit.json fmmt458ta: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
fmmt458ta-etched.glb fmmt458ta: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
fmmt458ta-etched.step fmmt458ta: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
fmmt458ta.glb Publish 0.1.0 · Ray 1mo ago
fmmt458ta.kicad_mod Publish 0.1.0 · Ray 1mo ago
fmmt458ta.kicad_sym Publish 0.1.0 · Ray 1mo ago
fmmt458ta.lbr Publish 0.1.0 · Ray 1mo ago
fmmt458ta.step Publish 0.1.0 · Ray 1mo ago
package.json fmmt458ta: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json fmmt458ta: specified limits as data (metadata.characteristics, 27 rows from the datasheet) · Ray 23d ago
README.md fmmt458ta: specified limits as data (metadata.characteristics, 27 rows from the datasheet) · Ray 23d ago

FMMT458TA

Diodes Incorporated · Bipolar (BJT) · SOT-23

FMMT458TA from Diodes Incorporated, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 B input NPN base terminal; continuous base current IB up to 200mA; base-emitter turn-on voltage VBE(on) max 0.9V at IC=50mA, VCE=10V.
2 E passive NPN emitter terminal; emitter-base breakdown voltage BVEBO min 7V; emitter cutoff current IEBO max 100nA at VEB=5.6V.
3 C passive NPN collector terminal; VCEO 400V, continuous collector current IC max 225mA, peak pulse current ICM 1A; VCE(sat) max 200mV at IC=20mA, IB=2mA.

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 Voltage VCBO 400 V 2
Collector-Emitter Voltage VCEO 400 V 2
Emitter-Base Voltage VEBO 7 V 2
Continuous Collector Current IC 225 mA 2
Peak Pulse Current ICM 1 A 2
Base Current IB 200 mA 2
Power Dissipation PD 500 mW Note 5: 15mm x 15mm x 1.6mm FR-4 PCB, still air 2
Thermal Resistance, Junction to Ambient RθJA 250 °C/W Note 5: 15mm x 15mm x 1.6mm FR-4 PCB, 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 2
Electrostatic Discharge - Machine Model ESD MM 400 V JEDEC Class C 2
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 7 V IE = 100µA 4
Collector Cutoff Current ICBO 100 nA VCB = 320V 4
Emitter Cutoff Current IEBO 100 nA VEB = 5.6V 4
Collector Emitter Cutoff Current ICES 100 nA VCE = 320V 4
Static Forward Current Transfer Ratio hFE 100 IC = 1mA, VCE = 10V 4
Static Forward Current Transfer Ratio hFE 15 IC = 100mA, VCE = 10V 4
Static Forward Current Transfer Ratio hFE 300 4
Collector-Emitter Saturation Voltage VCE(sat) 200 mV IC = 20mA, IB = 2mA 4
Collector-Emitter Saturation Voltage VCE(sat) 500 mV IC = 50mA, IB = 6mA 4
Base-Emitter Turn-On Voltage VBE(on) 0.9 V IC = 50mA, VCE = 10V 4
Base-Emitter Saturation Voltage VBE(sat) 0.9 V IC = 50mA, IB = 5mA 4
Output Capacitance Cobo 5 pF VCB = 20V, f = 1MHz 4
Transition Frequency fT 50 MHz VCE = 20V, IC = 10mA, f = 20MHz 4

CAD (KiCad official)

  • Symbol: FMMT458TA
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: fmmt458ta-etched.step / fmmt458ta-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fmmt458ta.step / fmmt458ta.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (7 pp, sha256 f814aabfe00cf07b, retrieved 2026-09-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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