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MMST4403-7-F

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Diodes Incorporated Bipolar Transistors - BJT, SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttriode-mos tube-transistormmst4403-7-ffactory-2.0.0extractor-text

Verified MMST4403-7-F

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier mfr, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: MMST4403-7-F · SOT-323 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 5-page datasheet
  • ✓distributor: lcsc C526686, digikey MMST4403-FDITR-ND, mouser 621-MMST4403-7-F
  • ✓family: SOT-323_SC-70
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-1t5kh4yz/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ mmst4403-7-f.kicad_sym✓ mmst4403-7-f.kicad_mod✓ mmst4403-7-f.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 1d ago
viewers mmst4403-7-f: viewers · Ray 1d ago
mmst4403-7-f-etched.glb Publish 0.1.0 · Ray 1d ago
mmst4403-7-f-etched.step mmst4403-7-f: factory component page (tier=mfr) · Ray 1d ago
mmst4403-7-f-hero.glb mmst4403-7-f: hero GLB from the etched model (keeps the MPN mark) · Ray 1d ago
mmst4403-7-f-hero.overlay.json Publish 0.1.0 · Ray 1d ago
mmst4403-7-f.glb Publish 0.1.0 · Ray 1d ago
mmst4403-7-f.kicad_mod Publish 0.1.0 · Ray 1d ago
mmst4403-7-f.kicad_sym Publish 0.1.0 · Ray 1d ago
mmst4403-7-f.lbr Publish 0.1.0 · Ray 1d ago
mmst4403-7-f.step Publish 0.1.0 · Ray 1d ago
package.json Publish 0.1.0 · Ray 1d ago
page.json Set visibility: public · Ray 1d ago
README.md Publish 0.1.0 · Ray 1d ago
verification.json Verified: Published by the parts factory: tier mfr, 3 pins · Ray 1d ago

MMST4403-7-F

Diodes Incorporated · Bipolar Transistors - BJT · SOT-323

MMST4403-7-F from Diodes Incorporated, 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 B input Base of the PNP transistor; VEBO is limited to -5.0 V and the base is on the bottom-left lead in the top-view pinout.
2 E passive Emitter of the PNP transistor; it is the bottom-right lead in the top-view pinout, with VEBO limited to -5.0 V.
3 C passive Collector of the PNP transistor; it is the single top lead in the pinout, with VCBO/VCEO of -40 V and IC of -600 mA continuous.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-323
Category Triode/MOS Tube/Transistor
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 -40 V 2
Collector-Emitter Voltage VCEO -40 V 2
Emitter-Base Voltage VEBO -5 V 2
Collector Current - Continuous IC -600 mA Note 4 2
Power Dissipation Pd 200 mW Note 4: device mounted on FR-4 PCB, 1 inch x 0.85 inch x 0.062 inch 2
Thermal Resistance, Junction to Ambient RθJA 625 K/W Note 4: device mounted on FR-4 PCB, 1 inch x 0.85 inch x 0.062 inch 2
Operating and Storage Temperature Range Tj, TSTG -55 150 °C 2
Collector-Base Breakdown Voltage V(BR)CBO -40 V IC = -100μA, IE = 0 2
Collector-Emitter Breakdown Voltage V(BR)CEO -40 V IC = -1.0mA, IB = 0 2
Emitter-Base Breakdown Voltage V(BR)EBO -5 V IE = -100μA, IC = 0 2
Collector Cutoff Current ICEX -100 nA VCE = -35V, VEB(OFF) = -0.4V 2
Base Cutoff Current IBL -100 nA VCE = -35V, VEB(OFF) = -0.4V 2
DC Current Gain hFE 30 IC = -100μA, VCE = -1.0V 2
DC Current Gain hFE 60 IC = -1.0mA, VCE = -1.0V 2
DC Current Gain hFE 100 IC = -10mA, VCE = -1.0V 2
DC Current Gain hFE 100 300 IC = -150mA, VCE = -2.0V 2
DC Current Gain hFE 20 IC = -500mA, VCE = -2.0V 2
Collector-Emitter Saturation Voltage VCE(SAT) -0.4 V IC = -150mA, IB = -15mA 2
Collector-Emitter Saturation Voltage VCE(SAT) -0.75 V IC = -500mA, IB = -50mA 2
Base-Emitter Saturation Voltage VBE(SAT) -0.75 -0.95 V IC = -150mA, IB = -15mA 2
Base-Emitter Saturation Voltage VBE(SAT) -1.3 V IC = -500mA, IB = -50mA 2
Output Capacitance Cob 8.5 pF VCB = -10V, f = 1.0MHz, IE = 0 2
Input Capacitance Ceb 30 pF VEB = -0.5V, f = 1.0MHz, IC = 0 2
Input Impedance hie 1.5 15 kΩ VCE = -10V, IC = -1.0mA, f = 1.0MHz 2
Voltage Feedback Ratio hre 0.1 8 x 10-4 2
Small Signal Current Gain hfe 60 500 2
Output Admittance hoe 1 100 μS 2
Current Gain-Bandwidth Product fT 200 MHz VCE = -10V, IC = -20mA, f = 100MHz 2
Delay Time td 15 ns VCE = -30V, IC = -150mA, VBE(OFF) = -2.0V, IB1 = -15mA 2
Rise Time tr 20 ns VCE = -30V, IC = -150mA, VBE(OFF) = -2.0V, IB1 = -15mA 2
Storage Time ts 225 ns VCE = -30V, IC = -150mA, IB1 = IB2 = -15mA 2
Fall Time tr 30 ns VCE = -30V, IC = -150mA, IB1 = IB2 = -15mA 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: Solderable per MIL-STD-202, Method 208 • Lead Free Plating (Matte Tin Finish annealed over 1

CAD (KiCad official)

  • Symbol: MMST4403-7-F
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323 (KiCad packages3D, STEP)
  • 3D model files: mmst4403-7-f-etched.step / mmst4403-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmst4403-7-f.step / mmst4403-7-f.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (5 pp, sha256 0a4002011ecc8452, retrieved 2026-11-05, 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