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MMBT6427-7-F

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Diodes Incorporated Darlington Transistors, SOT-23. 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

markdown

MMBT6427-7-F

Diodes Incorporated · Darlington Transistors · SOT-23

MMBT6427-7-F from Diodes Incorporated, in a SOT-23. 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; drives the input transistor (hFE 10,000 min at IC = 10mA, VCE = 5V; VEBO max 12 V).
2 E passive Emitter of the Darlington pair; VCEO and VCBO are rated 40 V and IC up to 500 mA (1 A peak).
3 C passive Collector of the Darlington pair; VCEO 40 V, VCBO 40 V, IC 500 mA continuous and 1 A peak.

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 Breakdown Voltage BVCBO 40 170 V IC = 100μA 4
Collector-Emitter Breakdown Voltage BVCEO 40 66 V IC = 10mA 4
Emitter-Base Breakdown Voltage BVEBO 12 17 V IE = 100μA 4
Collector Cutoff Current ICBO 1 50 nA VCB = 30V 4
Collector Cutoff Current ICES 0.03 1 μA VCE = 25V 4
Emitter Cutoff Current IEBO 1 50 nA VEB = 10V 4
DC Current Gain hFE 10000 100000 IC = 10mA, VCE = 5V 4
DC Current Gain hFE 20000 200000 IC = 100mA, VCE = 5V 4
DC Current Gain hFE 14000 140000 IC = 500mA, VCE = 5V 4
Collector-Emitter Saturation Voltage VCE(sat) 0.68 1.2 V IC = 50mA, IB = 0.5mA 4
Collector-Emitter Saturation Voltage VCE(sat) 0.87 1.5 V IC = 500mA, IB = 0.5mA 4
Base-Emitter Saturation Voltage VBE(sat) 1.55 2 V IC = 500mA, IB = 0.5mA 4
Base-Emitter On Voltage VBE(on) 1.25 1.75 V IC = 50mA, VCE = 5V 4
Collector-Base Voltage VCBO 40 V 2
Collector-Emitter Voltage VCEO 40 V 2
Emitter-Base Voltage VEBO 12 V 2
Collector Current IC 500 mA 2
Peak Collector Current ICM 1 A 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
Power Dissipation PD 310 mW Note 5: minimum recommended pad layout, 1oz copper, single-sided FR4, still air 2
Power Dissipation PD 350 mW Note 6: 15mm x 15mm 1oz copper 2
Thermal Resistance, Junction to Ambient RθJA 403 C/W Note 5: minimum recommended pad layout, 1oz copper, single-sided FR4, still air 2
Thermal Resistance, Junction to Ambient RθJA 357 C/W Note 6: 15mm x 15mm 1oz copper 2
Thermal Resistance, Junction to Leads RθJL 350 C/W Note 7: junction to solder point at end of leads 2
Thermal Resistance, Junction to Case RθJC 120 C/W Note 5: minimum recommended pad layout, 1oz copper, single-sided FR4, still air 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: MMBT6427-7-F
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: mmbt6427-7-f-etched.step / mmbt6427-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbt6427-7-f.step / mmbt6427-7-f.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (7 pp, sha256 409ff2b7c8678124, 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