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MMST3904Q-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.

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MMST3904Q-7-F

Diodes Incorporated · Bipolar Transistors - BJT · SOT-323

MMST3904Q-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 terminal, bottom-left in the top-view pinout; the NPN control input, with VEBO rated at 6V maximum.
2 E passive Emitter terminal, bottom-right in the top-view pinout; the NPN current-return terminal, with VEBO rated at 6V maximum.
3 C passive Collector terminal, top centre in the top-view pinout; rated for IC of 200mA, VCEO of 40V and VCBO of 60V maximum.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-323
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 60 V TA = +25°C 2
Collector-Emitter Voltage VCEO 40 V TA = +25°C 2
Emitter-Base Voltage VEBO 6 V TA = +25°C 2
Collector Current IC 200 mA TA = +25°C 2
Power Dissipation PD 200 mW TA = +25°C, Note 5 2
Thermal Resistance, Junction to Ambient RθJA 625 °C/W Note 5 2
Operating and Storage Temperature Range TJ, TSTG -55 150 °C 2
ESD Human Body Model ESD HBM 4000 V JEDEC Class 3A 2
ESD Machine Model ESD MM 400 V JEDEC Class C 2
Collector-Base Breakdown Voltage BVCBO 60 V IC = 10µA, IE = 0 4
Collector-Emitter Breakdown Voltage BVCEO 40 V IC = 1mA, IB = 0 4
Emitter-Base Breakdown Voltage BVEBO 5 V IE = 10µA, IC = 0 4
Collector Cutoff Current ICEX 50 nA VCE = 30V, VEB(OFF) = 3V 4
Base Cutoff Current IBL 50 nA VCE = 30V, VEB(OFF) = 3V 4
DC Current Gain hFE 40 IC = 100µA, VCE = 1V 4
DC Current Gain hFE 70 IC = 1mA, VCE = 1V 4
DC Current Gain hFE 100 300 IC = 10mA, VCE = 1V 4
DC Current Gain hFE 60 IC = 50mA, VCE = 1V 4
DC Current Gain hFE 30 IC = 100mA, VCE = 1V 4
Collector-Emitter Saturation Voltage VCE(SAT) 0.25 V IC = 10mA, IB = 1mA 4
Collector-Emitter Saturation Voltage VCE(SAT) 0.3 V IC = 50mA, IB = 5mA 4
Base-Emitter Saturation Voltage VBE(SAT) 0.65 0.85 V IC = 10mA, IB = 1mA 4
Base-Emitter Saturation Voltage VBE(SAT) 0.95 V IC = 50mA, IB = 5mA 4
Output Capacitance Cobo 4 pF VCB = 5V, f = 1.0MHz, IE = 0 4
Input Capacitance Cibo 8 pF VEB = 0.5V, f = 1.0MHz, IC = 0 4
Input Impedance hie 1 10 kΩ VCE = 10V, IC = 1mA, f = 1.0MHz 4
Voltage Feedback Ratio hre 0.5 8 x 10-4 VCE = 10V, IC = 1mA, f = 1.0MHz 4
Small Signal Current Gain hfe 100 400 VCE = 10V, IC = 1mA, f = 1.0MHz 4
Output Admittance hoe 1 40 µS VCE = 10V, IC = 1mA, f = 1.0MHz 4
Current Gain-Bandwidth Product fT 300 MHz VCE = 20V, IC = 10mA, f = 100MHz 4
Noise Figure NF 5 dB VCC = 5V, IC = 100µA, RS = 1kΩ, f = 1MHz 4
Delay Time td 35 ns VCC = 3V, IC = 10mA, VBE(OFF) = -0.5V, IB1 = 1mA 4
Rise Time tr 35 ns VCC = 3V, IC = 10mA, VBE(OFF) = -0.5V, IB1 = 1mA 4
Storage Time ts 200 ns VCC = 3.0V, IC = 10mA, IB1 = IB2 = 1.0mA 4
Fall Time tf 50 ns VCC = 3.0V, IC = 10mA, IB1 = IB2 = 1.0mA 4

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: MMST3904Q-7-F
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323 (KiCad packages3D, STEP)
  • 3D model files: mmst3904q-7-f-etched.step / mmst3904q-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmst3904q-7-f.step / mmst3904q-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 7675f9374d03bb49, retrieved 2026-11-02, 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