MMDT3904Q-7-F from Diodes Incorporated, in a SOT-363. 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	E2	passive	Emitter of transistor 2 (NPN); the datasheet gives VEBO of 6.0 V maximum and IC of 200 mA maximum for the transistor.
2	B2	passive	Base of transistor 2 (NPN); the datasheet gives VEBO of 6.0 V maximum and VCBO of 60 V maximum.
3	C1	passive	Collector of transistor 1 (NPN); the datasheet gives VCEO of 40 V, VCBO of 60 V and IC of 200 mA maximum.
4	E1	passive	Emitter of transistor 1 (NPN); the datasheet gives VEBO of 6.0 V maximum and IC of 200 mA maximum for the transistor.
5	B1	passive	Base of transistor 1 (NPN); the datasheet gives VEBO of 6.0 V maximum and VCBO of 60 V maximum.
6	C2	passive	Collector of transistor 2 (NPN); the datasheet gives VCEO of 40 V, VCBO of 60 V and IC of 200 mA maximum.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	SOT-363
Category	Transistors/Thyristors
Pins	6

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Max	Unit	Conditions	Page
Collector-Base Voltage	VCBO		60	V		2
Collector-Emitter Voltage	VCEO		40	V		2
Emitter-Base Voltage	VEBO		6	V		2
Collector Current	IC		200	mA		2
Power Dissipation	PD		200	mW	Note 6 (FR-4 minimum recommended pad layout, still air)	2
Thermal Resistance, Junction to Ambient	RθJA		625	°C/W	Note 6 (FR-4 minimum recommended pad layout, still air)	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	60		V	IC = 100µA, IE = 0	3
Collector-Emitter Breakdown Voltage	BVCEO	40		V	IC = 10.0mA, IB = 0	3
Emitter-Base Breakdown Voltage	BVEBO	6		V	IE = 100µA, IC = 0	3
Collector-Base Cut-Off Current	ICBO		50	nA	VCB = 50V	3
Collector-Emitter Cut-Off Current	ICEV		50	nA	VCE = 40V, VBE(OFF) = 3.0V	3
Emitter-Base Cut-Off Current	IEBO		50	nA	VEB = 5V	3
DC Current Gain	hFE	40			IC = 100µA, VCE = 1.0V	3
DC Current Gain	hFE	70			IC = 1.0mA, VCE = 1.0V	3
DC Current Gain	hFE	100			IC = 10mA, VCE = 1.0V	3
DC Current Gain	hFE	60			IC = 50mA, VCE = 1.0V	3
DC Current Gain	hFE	30			IC = 100mA, VCE = 1.0V	3
DC Current Gain	hFE		300			3
Collector-Emitter Saturation Voltage	VCE(SAT)		0.2	V	IC = 10mA, IB = 1.0mA	3
Collector-Emitter Saturation Voltage	VCE(SAT)		0.3	V	IC = 50mA, IB = 5.0mA	3
Base-Emitter Saturation Voltage	VBE(SAT)	0.65	0.85	V	IC = 10mA, IB = 1.0mA	3
Base-Emitter Saturation Voltage	VBE(SAT)		0.95	V	IC = 50mA, IB = 5.0mA	3
Output Capacitance	Cobo		4	pF	VCB = 5.0V, f = 1.0MHz, IE = 0	3
Input Capacitance	Cibo		8	pF	VEB = 0.5V, f = 1.0MHz, IC = 0	3
Input Impedance	hie	1	10	kΩ	VCE = 10V, IC = 1.0mA, f = 1.0kHz	3
Voltage Feedback Ratio	hre	0.5	8	x 10-4	VCE = 10V, IC = 1.0mA, f = 1.0kHz	3
Small Signal Current Gain	hfe	100	400			3
Output Admittance	hoe	1	40	µs		3
Current Gain-Bandwidth Product	fT	300		MHz	VCE = 20V, IC = 10mA, f = 100MHz	3
Noise Figure	NF		5	dB	VCE = 5.0V, IC = 100μA, RS = 1.0kΩ, f = 1.0kHz	3
Delay Time	tD		35	ns	VCC = 3.0V, IC = 10mA, VBE(OFF) = -0.5V, IB1 = 1.0mA	3
Rise Time	tR		35	ns	VCC = 3.0V, IC = 10mA, VBE(OFF) = -0.5V, IB1 = 1.0mA	3
Storage Time	tS		200	ns	VCC = 3.0V, IC = 10mA	3
Fall Time	tF		50	ns	IB1 = -IB2 = 1.0mA	3

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 Finish; Solderable per MIL-STD202, Method 208  Weight: 0.006 grams (Approximate)	1

CAD (KiCad official)

Symbol: MMDT3904Q-7-F
Footprint: Package_TO_SOT_SMD:SOT-363_SC-70-6
3D model: SOT-363 (KiCad packages3D, STEP)
3D model files: mmdt3904q-7-f-etched.step / mmdt3904q-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmdt3904q-7-f.step / mmdt3904q-7-f.glb are the bare package body.

Provenance

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

Datasheet: Diodes Incorporated datasheet (6 pp, sha256 b5b33ef7e2ac190e, 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

MMDT3904Q-7-F

Verified MMDT3904Q-7-F

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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