Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

PCB Footprint

Open full view ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Datasheet

Open in new tab ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Download PDF

Contents

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

README

markdown

SP4044-04ATG

Littelfuse · TVS · MSOP-10

SP4044-04ATG from Littelfuse, in a MSOP-10. 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	I/O 1	passive	ESD/surge-protected I/O channel 1 with 1.5pF (TYP) capacitance to GND, rated for 24A (8/20μs) and ±30kV IEC 61000-4-2 contact/air.
2	NC	unconnected	No connection.
3	GND	power_in	Ground reference, internally connected to pin 8 as the common return for all diode channels.
4	NC	unconnected	No connection.
5	I/O 2	passive	ESD/surge-protected I/O channel 2 with 1.5pF (TYP) capacitance to GND, rated for 24A (8/20μs) and ±30kV IEC 61000-4-2 contact/air.
6	NC	unconnected	No connection.
7	I/O 3	passive	ESD/surge-protected I/O channel 3 with 1.5pF (TYP) capacitance to GND, rated for 24A (8/20μs) and ±30kV IEC 61000-4-2 contact/air.
8	GND	power_in	Ground reference, internally connected to pin 3 as the common return for all diode channels.
9	I/O 4	passive	ESD/surge-protected I/O channel 4 with 1.5pF (TYP) capacitance to GND, rated for 24A (8/20μs) and ±30kV IEC 61000-4-2 contact/air.
10	NC	unconnected	No connection.

Key specifications

Parameter	Value
Manufacturer	Littelfuse
Package	MSOP-10
Category	Circuit Protection
Pins	10

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Reverse Standoff Voltage	VRWM			2.8	V		2
Snap Back Voltage	VSB	2.8			V	ISB=50mA	2
Reverse Leakage Current	ILEAK		0.5	1	µA	VR=2.8V, I/O to GND	2
Clamp Voltage	VC			5.2	V	IPP=1A, tp=8/20µs, Fwd	2
Clamp Voltage	VC			6	V	IPP=2A, tp=8/20µs, Fwd	2
ESD Withstand Voltage (Contact)	VESD	-30		30	kV	IEC61000-4-2 (Contact)	2
ESD Withstand Voltage (Air)	VESD	-30		30	kV	IEC61000-4-2 (Air)	2
Peak Current	IPP			24	A	tp=8/20μs	2
Peak Pulse Power	PPK			500	W	tp=8/20µs	2
Operating Temperature	TOP	-40		125	°C		2
Storage Temperature	TSTOR	-55		150	°C		2
Maximum Junction Temperature				150	°C		2
Maximum Lead Temperature				260	°C	Soldering 20-40s	2
Dynamic Resistance	RDYN		0.22		Ω	TLP tp=100ns, Pin 1 to Pin 2	2
Diode Capacitance	CI/O-GND		1.5		pF	Reverse Bias=0V	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	Copper Alloy		Lead Plating Pre-Plated Frame Lead Material Copper Alloy	3

CAD (KiCad official)

Symbol: SP4044-04ATG
Footprint: Package_SO:MSOP-10_3x3mm_P0.5mm
3D model: MSOP-10 (KiCad packages3D, STEP)
3D model files: sp4044-04atg-etched.step / sp4044-04atg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sp4044-04atg.step / sp4044-04atg.glb are the bare package body.

Provenance

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

Datasheet: Littelfuse datasheet (4 pp, sha256 decba90a59d598bd, retrieved 2026-10-23, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-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