Find verified K4145 MOSFET suppliers & drop-in replacements

The K4145 (2SK4145) is a high-performance N-channel MOSFET (60V, 84A) primarily used in high-speed switching applications like motor drivers and DC/DC converters Renesas Datasheet4U. While technically obsolete at major manufacturers like Renesas, it remains widely available through specialized B2B distributors and secondary manufacturers Renesas Aliexpress.

Key Technical Specs

Voltage/Current: 60V / 84A continuous drain current.
Resistance ($R_{DS(on)}$): Extremely low at 10 mΩ max, reducing heat loss Datasheet4U.
Package: Standard TO-220AB through-hole Indiamart Aliexpress.

Supplier Landscape

Research identified over 60 potential suppliers, predominantly based in Shenzhen, China. These suppliers offer both the original components and compatible high-current N-channel alternatives. Detailed supplier profiles, including verification status and transaction history, can be found in the attached files.

Market Trends (2026)

Market Growth: The global power MOSFET market is valued at $9.45 billion in 2026, driven by Electric Vehicle (EV) battery management and renewable energy expansion Persistencemarketresearch.
Pricing Dynamics: Continuous upward pressure on prices is expected due to rising raw material costs and the shift toward premium Silicon Carbide (SiC) and Gallium Nitride (GaN) technologies Persistencemarketresearch Linkedin.
Supply Outlook: While standard silicon MOSFETs like the K4145 face pricing pressure from low-cost regional competitors, the demand for high-reliability (AEC-Q101) variants remains steady Researchandmarkets Researchandmarkets.