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MMST6427-7-F

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Diodes Incorporated Darlington Transistors, SOT-323-3. 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

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Datasheet

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Contents

README

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MMST6427-7-F

Diodes Incorporated · Darlington Transistors · SOT-323-3

MMST6427-7-F from Diodes Incorporated, in a SOT-323-3. 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 Darlington pair, at the bottom-left of the top-view pin-out; VEBO is 12 V max and IB is set low (0.5 mA in the VCE(sat) test conditions).
2 E passive Emitter of the Darlington pair, at the bottom-right of the top-view pin-out; continuous collector current is 500 mA max.
3 C passive Collector, the single pin on the top side of the top-view pin-out; VCEO is 40 V max and continuous IC is 500 mA max.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-323-3
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 TA = 25°C 2
Collector-Emitter Voltage VCEO 40 V TA = 25°C 2
Emitter-Base Voltage VEBO 12 V TA = 25°C 2
Collector Current - Continuous IC 500 mA TA = 25°C, Note 4 2
Power Dissipation Pd 200 mW TA = 25°C, Note 4 2
Thermal Resistance, Junction to Ambient RθJA 625 °C/W Note 4 2
Operating and Storage Temperature Range Tj, TSTG -55 150 °C 2
Collector-Base Breakdown Voltage BVCBO 40 V IC = 100μA, IE = 0 2
Collector-Emitter Breakdown Voltage BVCEO 40 V IC = 10mA, IB = 0 2
Emitter-Base Breakdown Voltage BVEBO 12 V IE = 10μA, IC = 0 2
Collector Cutoff Current ICBO 50 nA VCB = 30V, IE = 0 2
Collector Cutoff Current ICEO 1 μA VCE = 25V, IB = 0 2
Emitter Cutoff Current IEBO 50 nA VEB = 10V, IC = 0 2
DC Current Gain hFE 10000 100000 IC = 10mA, VCE = 5.0V 2
DC Current Gain hFE 20000 200000 IC = 100mA, VCE = 5.0V 2
DC Current Gain hFE 14000 140000 IC = 500mA, VCE = 5.0V 2
Collector-Emitter Saturation Voltage VCE(sat) 1.2 V IC = 50mA, IB = 0.5mA 2
Collector-Emitter Saturation Voltage VCE(sat) 1.5 V IC = 500mA, IB = 0.5mA 2
Base-Emitter Saturation Voltage VBE(sat) 2 V IC = 500mA, IB = 0.5mA 2
Base-Emitter On Voltage VBE(on) 1.75 V IC = 50mA, VCE =5.0V 2
Output Capacitance Cobo 8 pF VCB = 10V, f = 1.0MHz, IE = 0 2
Input Capacitance Cibo 15 pF VEB = 0.5V, f = 1.0MHz, IC = 0 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 Alloy 42 1

CAD (KiCad official)

  • Symbol: MMST6427-7-F
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323-3 (KiCad packages3D, STEP)
  • 3D model files: mmst6427-7-f-etched.step / mmst6427-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmst6427-7-f.step / mmst6427-7-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 ea2319c9f5fc5e3d, retrieved 2026-10-22, 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