STMicroelectronics

STF11N65K3

STF11N65K3 Description

The STF11N65K3 from STMicroelectronics is an N-channel 650V, 11A power MOSFET belonging to the SuperMESH3™ series, designed for high-efficiency switching applications. Housed in a TO220FP package with through-hole mounting, it offers a robust 35W (Tc) power dissipation capability. This device leverages advanced MOSFET (Metal Oxide) technology to deliver low conduction losses, characterized by an Rds(on) of 850mOhm @ 3.6A, 10V. Though marked as Obsolete, it remains a reliable choice for legacy designs due to its REACH Unaffected and ROHS3 Compliant status, ensuring environmental compliance.

STF11N65K3 Features

• High Voltage Rating: 650V Vdss ensures reliability in demanding power circuits.
• Low Gate Charge: 42 nC @ 10V Qg minimizes switching losses, enhancing efficiency.
• Optimized Switching Performance: 1180 pF @ 50V Ciss reduces Miller effect, improving dynamic response.
• Wide Gate-Source Voltage Range: ±30V Vgs(max) provides flexibility in drive circuitry.
• Thermal Efficiency: TO220FP package with 1 (Unlimited) MSL rating ensures durability in harsh environments.
• Low Threshold Voltage: 4.5V @ 100µA Vgs(th) enables compatibility with low-voltage controllers.

STF11N65K3 Applications

Ideal for high-voltage, medium-current applications, the STF11N65K3 excels in:

• Switch-Mode Power Supplies (SMPS): Leveraging its low Rds(on) and fast switching for PFC and DC-DC stages.
• Motor Drives and Inverters: High Vdss and thermal stability suit industrial motor control systems.
• Lighting Ballasts: Efficient switching for LED drivers and HID lighting.
• Renewable Energy Systems: Solar inverters benefit from its high voltage tolerance and low losses.

Conclusion of STF11N65K3

The STF11N65K3 combines high-voltage capability, low conduction losses, and robust thermal performance, making it a strong candidate for power electronics designs despite its obsolete status. Its SuperMESH3™ technology ensures superior efficiency in switching applications, while the TO220FP package provides mechanical and thermal reliability. Engineers working on legacy or cost-sensitive projects will find this MOSFET a dependable solution for high-efficiency power conversion.