STMicroelectronics STL33N65M2

Overview

STL33N65M2 from STMicroelectronics is an N-channel 650 V, 20 A Power MOSFET in PowerFLAT™ 8x8 HV package, featuring 0.124 Ω typ. R_DS(on), 41.5 nC total gate charge, and 100% avalanche tested. It serves as a high-voltage switching device in primary-side SMPS, PFC stages, and industrial inverters requiring fast switching and low conduction loss.

For engineers reviewing the STL33N65M2 datasheet, STL33N65M2 pinout, STL33N65M2 application, or STL33N65M2 equivalent, key selection criteria include its 650 V V_(BR)DSS, 0.154 Ω max R_DS(on) at 10 V_GS, 150 W P_TOT, 15 V/ns diode recovery dv/dt rating, and Zener-protected gate structure.

Technical Context

This MDmesh™ M2 technology MOSFET uses a strip layout and optimized vertical structure to simultaneously reduce R_DS(on) and output capacitance (C_oss = 75 pF typ.), enabling high-efficiency operation in hard-switched topologies. Its 380 pF C_oss(eq) (0–520 V) supports predictable turn-off energy calculation.

The device integrates a robust body diode with 426 ns trr at 24 A and 100 °C junction temperature, and features Zener-protected gate oxide rated for ±25 V V_GS, ensuring reliability under transient overvoltage conditions.

Key Specifications

Pinout & Package

STL33N65M2 is housed in a surface-mount PowerFLAT™ 8x8 HV package with exposed drain pad for thermal enhancement and dual-source terminals for low-inductance source return.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage power switching applications.

Compared with IXTH30N65X2 and IPP65R190C7, STL33N65M2 delivers best-in-class R_DS(on)/Q_g tradeoff in surface-mount form factor, enabling compact, thermally efficient designs where PCB space and thermal management are constrained.

Availability

STL33N65M2 is available at Aetrix Electronics and suitable for server power supplies, industrial motor drives, telecom rectifiers, and solar microinverters requiring stable component supply and long-term production continuity.

Supply support for STL33N65M2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs and discrete power devices for industrial, automotive, and consumer markets.

The STL33N65M2 belongs to ST's MDmesh™ M2 high-voltage MOSFET product line, engineered specifically for high-efficiency, high-frequency switched-mode power supplies and industrial motor control systems.

FAQ

What is the maximum continuous drain current at 100 °C case temperature?

The STL33N65M2 supports 12.6 A continuous drain current at T_C = 100 °C, as specified in Table 2 of the datasheet. This derating reflects thermal limits of the PowerFLAT™ 8x8 HV package and ensures safe operation within SOA boundaries under sustained load conditions.

Does this MOSFET require external gate protection?

No external gate protection is required. The STL33N65M2 integrates a Zener diode between gate and source, clamping V_GS to ±25 V. This built-in protection eliminates the need for external TVS diodes in typical gate-drive configurations with proper layout and decoupling.

Can STL33N65M2 replace older MDmesh™ M1 devices in existing designs?

Yes-it is a direct drop-in replacement for STL30N65M1 and STL28N65M1 in most layouts due to identical PowerFLAT™ 8x8 HV footprint and improved R_DS(on) (0.124 Ω vs. 0.145 Ω) and lower Q_g. No gate-drive or thermal redesign is needed unless pushing higher frequency or efficiency targets.

What is the recommended PCB layout for thermal performance?

ST recommends a minimum 25 mm² copper pad (2 oz Cu) connected to the exposed drain pad via ≥6 thermal vias (0.3 mm diameter, 0.8 mm pitch). The dual-source pins should be routed with short, wide traces to minimize loop inductance, and gate traces must be shielded from drain switching noise to prevent false turn-on.