STMicroelectronics STB19NM65N

Overview

STB19NM65N from STMicroelectronics is an N-channel 650 V, 0.25 Ω R_DS(on), 15.5 A power MOSFET in D²PAK (TO-263) package, implementing second-generation MDmesh™ technology for high-efficiency switching converters. It delivers low gate charge (55 nC), low input capacitance (1900 pF), and 100% avalanche-tested ruggedness, enabling use in industrial AC-DC SMPS and PFC stages.

For engineers reviewing the STB19NM65N datasheet, STB19NM65N pinout, STB19NM65N application, or STB19NM65N equivalent, key selection criteria include its 710 V V_DSS rating, 150 W total dissipation at T_C = 25 °C, 30 V/ns dv/dt capability under inductive turn-off, and SOA compliance up to 62 A pulsed drain current.

Technical Context

This device uses ST's proprietary vertical MDmesh™ structure combined with strip layout to minimize conduction and switching losses simultaneously. Its 0.25 Ω R_DS(on) at V_GS = 10 V and 7.75 A enables high-current operation with low thermal stress, while its 55 nC total gate charge supports efficient high-frequency PWM control in hard-switched topologies.

The integrated body diode exhibits 460 ns reverse recovery time (T_j = 25 °C) and 6 µC Q_rr, making it suitable for synchronous rectification and freewheeling in continuous conduction mode (CCM) boost and LLC resonant converters where diode recovery behavior critically impacts EMI and efficiency.

Key Specifications

Pinout & Package

STB19NM65N is housed in a surface-mount D²PAK (TO-263) package with three terminals: Drain (pins 1 & 2), Source (pin 3), and Gate (pin 3 via isolated pad). The package features exposed drain tab for direct PCB thermal coupling and complies with ECOPACK® lead-free interconnect standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STW19NM65N and IPP65R280C7, STB19NM65N offers optimal balance of thermal interface simplicity (D²PAK solderable thermal pad), avalanche ruggedness, and cost for medium-power industrial SMPS where PCB area is constrained but airflow is limited.

Availability

STB19NM65N is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, telecom rectifiers, and solar microinverters requiring stable component supply and long-term manufacturability.

Supply support for STB19NM65N 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 MDmesh™ power MOSFET product line targets high-efficiency, high-voltage switching applications-including server PSUs, industrial motor drives, and renewable energy inverters-by optimizing the trade-off between R_DS(on), gate charge, and ruggedness.

FAQ

What is the maximum safe operating area (SOA) for STB19NM65N at 100 °C case temperature?

At T_C = 100 °C, the continuous drain current is derated to 10 A per absolute maximum ratings table. The SOA curve (Figure 2) confirms safe operation up to 15.5 A at V_DS ≤ 100 V, or 62 A pulsed (IDM) at V_DS ≤ 40 V, provided pulse width remains within thermal limits defined by R_thj-case = 3.6 °C/W and T_j ≤ 150 °C.

Does STB19NM65N require a gate resistor for EMI suppression, and what value is recommended?

Yes-a gate resistor is required to dampen ringing caused by gate loop inductance interacting with C_iss and C_rss. For standard 4.7 Ω gate drive (per switching time test condition), a 10–22 Ω series resistor is recommended to limit peak gate current to <2 A while maintaining t_f < 30 ns and minimizing dv/dt-induced shoot-through risk in half-bridge configurations.

Can STB19NM65N be used in parallel configurations, and what layout considerations apply?

Yes, but only with matched devices and symmetrical PCB layout. Key requirements include identical gate trace lengths (<2 mm difference), Kelvin-source routing to eliminate common-source inductance, and thermally balanced mounting to avoid current imbalance from R_DS(on) drift. Derate total current by 15% versus sum of individual ratings to account for thermal coupling.

Is the body diode of STB19NM65N suitable for synchronous rectification in LLC resonant converters?

No-the body diode has relatively high V_SD (1.3 V) and moderate Q_rr (6 µC), making it inefficient for synchronous rectification. It is optimized for freewheeling and clamping roles. For synchronous rectification, a dedicated low-V_F, low-Q_rr Schottky or GaN FET should be used instead, while STB19NM65N remains in the primary-side switching position.