STMicroelectronics STL3NM60N

Overview

STL3NM60N from STMicroelectronics is an N-channel 600 V, 1.8 Ω (max) MDmesh II Power MOSFET in PowerFLAT 3.3×3.3 HV package, rated for 2.2 A continuous drain current at T_C = 25 °C and 100% avalanche tested. It delivers low gate charge (9.5 nC), low input capacitance (188 pF), and high dv/dt ruggedness (15 V/ns), enabling high-efficiency flyback and PFC converters in space-constrained industrial power supplies.

For engineers reviewing the STL3NM60N datasheet, STL3NM60N pinout, STL3NM60N application, or STL3NM60N equivalent, this device is selected for high-voltage switching where thermal efficiency, avalanche robustness, and compact surface-mount packaging are critical - especially in offline AC-DC adapters, LED drivers, and auxiliary SMPS stages requiring <3 mm profile and >600 V blocking capability.

Technical Context

This MOSFET employs ST's second-generation MDmesh vertical strip architecture to minimize R_DS(on) × Q_g figure-of-merit. Its 1.5 Ω typical on-resistance at V_GS = 10 V and 1.1 Ω effective R_DS(on) at 100 °C enable low conduction loss in thermally constrained designs. The integrated body diode exhibits 168 ns reverse recovery time and 672 nC Q_rr at 25 °C, supporting hard-switched topologies with controlled commutation stress.

The PowerFLAT 3.3×3.3 HV package features exposed drain pad (pins 5–8) for direct PCB thermal coupling, achieving R_thJC = 5.6 °C/W. Gate drive compatibility is ensured by ±25 V V_GS rating and 6 Ω intrinsic gate resistance, allowing stable operation with standard 10 V logic-level gate drivers without external series resistance.

Key Specifications

Pinout & Package

Package: PowerFLAT 3.3×3.3 HV - 8-pin, bottom-side thermal pad, lead-free, RoHS-compliant surface-mount package with exposed drain (D) on pins 5–8 for direct PCB heat sinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP3NK60Z and FDPF18N60NZ, STL3NM60N uniquely balances ultra-compact footprint, guaranteed avalanche ruggedness, and optimized Q_g/R_DS(on) trade-off - making it the only choice for thermally dense, high-reliability 65–130 kHz offline converters where board height <1.0 mm is mandatory.

Availability

STL3NM60N is available at Aetrix Electronics and suitable for AC-DC adapters, LED drivers, and industrial auxiliary power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for STL3NM60N 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 microcontrollers, power transistors, sensors, and analog ICs for automotive, industrial, and consumer markets.

This device belongs to ST's MDmesh™ high-voltage Power MOSFET product line, engineered specifically for high-efficiency, high-density offline power conversion - emphasizing low R_DS(on) × Q_g, avalanche robustness, and surface-mount thermal performance.

FAQ

What is the maximum safe operating junction temperature for STL3NM60N?

The absolute maximum junction temperature is 150 °C, with derated current capability above 100 °C case temperature. At T_C = 100 °C, the continuous drain current drops to 1.7 A. Thermal design must maintain T_J ≤ 150 °C under worst-case ambient and power dissipation conditions, using the provided R_thJC = 5.6 °C/W and R_thJA = 62.5 °C/W (1-inch² FR-4, 2 oz Cu) values.

Can STL3NM60N replace a TO-220 MOSFET in an existing design?

No direct drop-in replacement is possible due to different package, pinout, and thermal interface. The PowerFLAT 3.3×3.3 HV requires a custom PCB footprint with exposed drain pad soldering, whereas TO-220 devices use through-hole or screw-mount heatsinks. Electrical parameters differ - e.g., R_DS(on) is 1.8 Ω vs. 2.2 Ω in STP3NK60Z - so gate drive timing and thermal layout must be re-validated.

Is the body diode suitable for synchronous rectification?

No - the integrated body diode has 168 ns reverse recovery time and 672 nC Q_rr, making it unsuitable for high-frequency synchronous rectification. It is designed for freewheeling in hard-switched topologies like flyback or boost, not zero-voltage switching (ZVS) or resonant circuits where fast recovery diodes or dedicated SR controllers are required.

Does STL3NM60N require a gate resistor for stability?

A small gate resistor (10–22 Ω) is recommended to dampen potential oscillation caused by PCB trace inductance interacting with the 6 Ω intrinsic gate resistance and 188 pF C_iss. Without it, ringing may exceed ±25 V V_GS rating during fast switching, risking gate oxide damage - especially in layouts with >5 mm gate trace length or inadequate ground return.