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Contents

Pinout
Key specifications
Electrical characteristics
Materials and finish
CAD (KiCad official)
Provenance

README

markdown

MMBD4448W-7-F

Diodes Incorporated · Switching Diodes · SOT-323

MMBD4448W-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	A	passive	Anode of the single fast switching diode (bottom-left lead in the top-view internal schematic); V(BR)R 75 V min, IFM 500 mA.
2	NC	unconnected	No internal connection; the bottom-right lead is not connected to the diode in the internal schematic.
3	K	passive	Cathode of the single fast switching diode (top lead in the top-view internal schematic); VRRM 75 V, IO 250 mA.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	SOT-323
Category	Diodes
Pins	3

Electrical characteristics

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

Parameter	Symbol	Min	Max	Unit	Conditions	Page
Reverse Breakdown Voltage	V(BR)R	75		V	IR = 10μA	2
Forward Voltage	VF	0.62	0.72	V	IF = 5.0mA	2
Forward Voltage	VF		0.855	V	IF = 10mA	2
Forward Voltage	VF		1	V	IF = 100mA	2
Forward Voltage	VF		1.25	V	IF = 150mA	2
Reverse Current	IR		1	μA	VR = 75V	2
Reverse Current	IR		50	μA	VR = 75V, TJ = 150°C	2
Reverse Current	IR		30	μA	VR = 25V, TJ = 150°C	2
Reverse Current	IR		25	nA	VR = 20V	2
Total Capacitance	CT		2	pF	VR = 0, f = 1.0MHz	2
Reverse Recovery Time	trr		4	ns	IF = IR = 10mA, Irr = 0.1 x IR, RL = 100Ω	2
Non-Repetitive Peak Reverse Voltage	VRM		100	V	TA = 25°C	2
Peak Repetitive Reverse Voltage	VRRM		75	V	TA = 25°C	2
Working Peak Reverse Voltage	VRWM		75	V	TA = 25°C	2
DC Blocking Voltage	VR		75	V	TA = 25°C	2
RMS Reverse Voltage	VR(RMS)		53	V	TA = 25°C	2
Forward Continuous Current	IFM		500	mA	TA = 25°C, Note 4	2
Average Rectified Output Current	IO		250	mA	TA = 25°C, Note 4	2
Non-Repetitive Peak Forward Surge Current	IFSM		4	A	t = 1.0μs	2
Non-Repetitive Peak Forward Surge Current	IFSM		1	A	t = 1.0s	2
Power Dissipation	PD		200	mW	Note 4	2
Thermal Resistance Junction to Ambient Air	RθJA		625	°C/W	Note 4	2
Operating and Storage Temperature Range	TJ, TSTG	-65	150	°C		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: Matte Tin Finish annealed over Alloy 42 leadframe (Lead Free Plating). Solderable per MIL-STD-202, Method 208	1

CAD (KiCad official)

Symbol: MMBD4448W-7-F
Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
3D model: SOT-323 (KiCad packages3D, STEP)
3D model files: mmbd4448w-7-f-etched.step / mmbd4448w-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbd4448w-7-f.step / mmbd4448w-7-f.glb are the bare package body.

Provenance

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

Datasheet: Diodes Incorporated datasheet (4 pp, sha256 de871bac2540f58d, 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