STN3N40K3Alternatives & Equivalent Parts

About STN3N40K3

STN3N40K3 is a MOSFET (N-Channel) component manufactured by STMicroelectronics. It comes in a SOT223 (3-Pin) package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.

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Specification Comparison

ParameterSTN3N40K3SourceSTN4NF03L760390015826632-9CD4020BESTM8S005C6T6101020011
ManufacturerSTMicroelectronicsSTMicroelectronicsWürth ElektronikTE ConnectivityTexas InstrumentsSTMicroelectronicsSeeed Studio
Package TypeSOT223 (3-Pin)SOT223 (3-Pin)OtherHeader, VerticalQuad Flat PackagesHeader, Vertical
Pin Count34618484
Temperature Range~ 150.0°C~ 150.0°C-40.0°C ~ 125.0°C-65.0°C ~ 105.0°C-40.0°C ~ 85.0°C
Price$0.1832$0.2121$0.6242$1.3100$0.3421$0.9301$5.6300
StockIn StockIn StockIn StockIn StockIn StockIn StockIn Stock
LifecycleACTIVEACTIVEACTIVEACTIVEACTIVE
Electrical Parameters
Factory Lead Time13 Weeks22 Weeks, 6 Days10 Weeks
YTEOL6.35.32159.19
Avalanche Energy Rating (Eas)45 mJ100 mJ
Case ConnectionDRAINDRAIN
ConfigurationSINGLE WITH BUILT-IN DIODESINGLE WITH BUILT-IN DIODE
DS Breakdown Voltage-Min400 V30 V
Drain Current-Max (ID)3 A6.5 A
Drain-source On Resistance-Max3.3 Ω0.06 Ω
FET TechnologyMETAL-OXIDE SEMICONDUCTORMETAL-OXIDE SEMICONDUCTOR
JESD-30 CodeR-PDSO-G3R-PDSO-G4S-PQFP-G48
JESD-609 Codee3e3e2e3
Number of Elements11
Operating ModeENHANCEMENT MODEENHANCEMENT MODE
Package Body MaterialPLASTIC/EPOXYPLASTIC/EPOXYPLASTIC/EPOXY
Package ShapeRECTANGULARRECTANGULARSQUARE
Package StyleSMALL OUTLINESMALL OUTLINEFLATPACK, LOW PROFILE, FINE PITCH
Peak Reflow Temperature (Cel)260260
Polarity/Channel TypeN-CHANNELN-CHANNEL
Power Dissipation-Max (Abs)3.3 W2.5 W
Pulsed Drain Current-Max (IDM)12 A26 A
Qualification StatusNot QualifiedNot Qualified
Surface MountYESYESYESYES
Terminal FinishMatte Tin (Sn)Matte Tin (Sn) - annealedTin/Silver (Sn96Ag4)Matte Tin (Sn)
Terminal FormGULL WINGGULL WINGGULL WING
Terminal PositionDUALDUALQUAD
Time@Peak Reflow Temperature-Max (s)30NOT SPECIFIED
Transistor ApplicationSWITCHINGSWITCHING
Transistor Element MaterialSILICONSILICON
Additional FeatureLOW THRESHOLDAMPMODU
## STN4NF03L Alternates Showing resultsImage
ApprovalsAEC-Q200; CUL; UL
Height4.19 mm
Input Voltage-Nom3.3 V
Mounting FeatureSURFACE MOUNT
Number of Primary Winding1
Number of Secondary Winding1
Operating Frequency-Max550 kHz
Operating Frequency-Min250 kHz
Output Voltage 15 V
Packing MethodTR, EMBOSSED PLASTIC, 13 INCH
Primary Inductance475 µH
Transformer TypeSMPS TRANSFORMER
Pbfree CodeYes
Body Breadth0.197 inch
Body Depth0.11 inch
Body Length0.9 inch
Body/Shell StyleRECEPTACLE
Connector TypeBOARD CONNECTOR
Contact Finish MatingNOT APPLICABLE
Contact GenderMALE
Contact MaterialNOT APPLICABLE
Contact PatternRECTANGULAR
Contact Resistance20 mΩ
Contact StyleSQ PIN-SKT
DIN ConformanceNO
Durability150 Cycles
EMI ShieldedNO
Empty ShellNO
Filter FeatureNO
IEC ConformanceNO
Insulation Resistance5000000000 Ω
Insulator ColorGREEN
Insulator MaterialPOLYBUTYLENE TEREPHTHALATE
MIL ConformanceNO
Mains Connector Rating5A
Mating Contact Pitch0.1 inch
Mating Contact Row Spacing0.1 inch
Mixed ContactsNO
Mounting StyleSTRAIGHT
Mounting TypeBOARD
Number Of ConnectorsONE
Number Of PCB Rows2
Number of Ports1
Number of Rows Loaded2
OptionGENERAL PURPOSE
PCB Contact PatternRECTANGULAR
PCB Contact Row Spacing2.54 mm
Panel MountNO
Plating Thickness31.5u inch
Rated Current (Signal)5 A
Reference StandardUL
Terminal Length0.126 inch
Terminal Pitch2.54 mm0.5 mm
Termination TypeSOLDER
Total Number of Contacts18
UL Flammability Code94V-0
Has ADCYES
Bit Size8
Boundary ScanNO
CPU FamilySTM8S
Clock Frequency-Max24 MHz
DAC ChannelsNO
DMA ChannelsNO
FormatFIXED POINT
Integrated CacheNO
Low Power ModeYES
Number of External Interrupts35
Number of I/O Lines38
On Chip Data RAM Width8
On Chip Program ROM Width8
PWM ChannelsYES
Package Equivalence CodeQFP48,.35SQ,20
RAM (bytes)2048
RAM (words)2048
ROM (words)32768
ROM ProgrammabilityFLASH
Speed16 MHz
Supply Current-Max60 mA
Supply Voltage-Max5.5 V
Supply Voltage-Min3.3 V
Supply Voltage-Nom3.3 V
TechnologyCMOS
Temperature GradeINDUSTRIAL
uPs/uCs/Peripheral ICs TypeMICROCONTROLLER

Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.

Need pricing on these alternatives?

Get one quote covering all 6 alternatives for STN3N40K3 — response within 24 hours.

Quick Links

STN4NF03L

suggested

760390015

suggested

826632-9

suggested

CD4020BE

suggested

101020011

suggested

Why Look for Alternatives?

Finding alternatives for STN3N40K3 is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.

When evaluating STN3N40K3 replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.

Can't Find What You Need?

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FAQ

What is equivalent to STN3N40K3?

Known equivalents for STN3N40K3 include STN4NF03L, 760390015, 826632-9. Contact FindMyChip for a full compatibility analysis for your specific application.

Can I use a different manufacturer's part instead of STN3N40K3?

In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.

How do I verify STN3N40K3 alternatives?

Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.