STMicroelectronics STP20NM65N

Overview

STP20NM65N from STMicroelectronics is a second-generation MDmesh™ N-channel Power MOSFET in TO-220 package, rated for 650 V drain-source voltage, 0.250 Ω typical R_DS(on) at V_GS = 10 V, and 15 A continuous drain current at T_C = 25 °C. It delivers low gate charge (44 nC) and low input capacitance (1280 pF), enabling high-efficiency operation in hard-switched PFC and SMPS stages.

For engineers reviewing the STP20NM65N datasheet, STP20NM65N pinout, STP20NM65N application, or STP20NM65N equivalent, key selection criteria include avalanche ruggedness (115 mJ E_AS), fast diode recovery (455 ns t_rr at T_j = 25 °C), thermal resistance (1.0 °C/W R_thJC), and 100 % avalanche-tested reliability for industrial power conversion designs.

Technical Context

This MOSFET employs ST's proprietary strip-based vertical MDmesh™ structure to minimize conduction and switching losses simultaneously. Its 650 V rating targets universal-input offline converters, while its 0.250 Ω R_DS(on) and 44 nC Q_g support high-frequency operation up to 100 kHz with reduced gate drive loss.

The integrated body diode exhibits 1.6 V forward voltage at 15 A and 455 ns reverse recovery time under standard test conditions (I_SD = 15 A, di/dt = 100 A/μs), making it suitable for quasi-resonant and ZVS topologies where diode softness impacts EMI and efficiency.

Key Specifications

Pinout & Package

TO-220 package with three leads: Drain (tab), Source (pin 1), Gate (pin 2). The metal tab is electrically connected to the Drain terminal and must be isolated from heatsink unless circuit topology permits common-drain configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IPP65R280C7 and STW20NM65ND, the STP20NM65N offers the best balance of low R_DS(on), proven avalanche margin, and TO-220 thermal performance for cost-sensitive 300–600 W industrial power supplies where layout space and heatsink mass are constrained.

Availability

STP20NM65N is available at Aetrix Electronics and suitable for server PSUs, industrial AC-DC converters, and LED driver bulk switches requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STP20NM65N 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 STP20NM65N belongs to ST's MDmesh™ high-voltage Power MOSFET product line, engineered specifically for high-efficiency, high-reliability offline power conversion in industrial and computing applications.

FAQ

Is STP20NM65N suitable for zero-voltage switching (ZVS) topologies?

Yes. Its body diode exhibits 455 ns reverse recovery time and 5.5 nC Q_rr at 25 °C, enabling reliable ZVS turn-on in LLC and phase-shifted full-bridge converters when operated within safe SOA limits. Diode performance degrades at elevated temperature-designers must verify t_rr = 710 ns and Q_rr = 8 nC at T_j = 150 °C during worst-case thermal analysis.

What is the maximum recommended gate drive voltage?

The absolute maximum V_GS rating is ±25 V, but ST recommends limiting gate drive to +10 V to +15 V for optimal R_DS(on) and reliability. Driving above +15 V provides negligible R_DS(on) improvement (<1 %) while increasing gate oxide stress and risk of spurious turn-on due to dv/dt coupling.

Does STP20NM65N require a gate resistor, and what value is recommended?

Yes-a gate resistor is mandatory to dampen parasitic oscillation and control dV/dt. For 65–100 kHz operation with a 1 A gate driver, a 10 Ω surface-mount resistor placed adjacent to the gate pin is recommended. Lower values (≤5 Ω) increase EMI risk; higher values (>22 Ω) degrade switching speed and increase switching loss.

Can STP20NM65N replace STP16NF60 in an existing design?

No-STP16NF60 is a 600 V, 0.30 Ω, 16 A device with different gate charge (35 nC) and no avalanche rating. STP20NM65N has higher voltage rating (650 V), lower R_DS(on) (0.250 Ω), higher Q_g (44 nC), and guaranteed avalanche capability. Direct replacement requires gate drive strength verification and SOA recalculation due to differing dynamic characteristics.