STMicroelectronics STE145N65M5

Overview

STE145N65M5 from STMicroelectronics is an N-channel 650 V, 143 A, 0.012 Ω typ. MDmesh™ M5 Power MOSFET in ISOTOP package, designed for high-efficiency hard-switching and resonant topologies in industrial power supplies and motor drives. It features 100% avalanche tested ruggedness, 2.5 kV isolation voltage, and low 414 nC total gate charge.

For engineers reviewing the STE145N65M5 datasheet, STE145N65M5 pinout, STE145N65M5 application, or STE145N65M5 equivalent, key selection criteria include R_DS(on) at 100 °C (0.015 Ω max), junction-to-case thermal resistance (0.184 °C/W), unclamped inductive switching capability, and source-drain diode recovery performance (Q_rr = 24.5 µC at T_j = 150 °C).

Technical Context

This device implements ST's MDmesh™ M5 vertical superjunction process with PowerMESH™ horizontal layout to achieve ultra-low conduction loss while maintaining high dv/dt immunity (15 V/ns) and robust unclamped inductive switching behavior. Its 710 V V_DS @ T_jmax rating enables design margin for 650 V bus applications under transient overvoltage conditions.

The integrated body diode exhibits fast reverse recovery (t_rr = 728 ns at 150 °C) and low Q_rr, reducing commutation losses in bridge configurations. Gate drive requirements are optimized by low input capacitance (18.5 nF) and intrinsic gate resistance (0.7 Ω), supporting efficient operation with standard gate drivers.

Key Specifications

Pinout & Package

The STE145N65M5 uses the ISOTOP package - a through-hole, isolated, 3-pin metal-can package with electrically insulated mounting base. Pin 1 (Drain) connects directly to the metal tab; Pin 2 (Source) and Pin 3 (Gate) are insulated leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IXTH120N65X2 and STW78N65M5, the STE145N65M5 uniquely combines highest current rating (143 A), lowest R_DS(on), and certified 2.5 kV isolation - making it the only option qualified for high-power, chassis-grounded industrial SMPS without added insulation layers.

Availability

STE145N65M5 is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, motor drive inverters, solar microinverters, and induction heating systems requiring stable component supply and long-term production continuity.

Supply support for STE145N65M5 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™ M5 product line targets high-efficiency, high-reliability power conversion systems - specifically engineered to replace IGBTs in 650 V hard-switched and resonant topologies up to 10 kW.

FAQ

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

The STE145N65M5 supports 90 A continuous drain current at T_C = 100 °C, as specified in Table 2 of the official datasheet (DocID025538 Rev 2). This rating reflects thermal derating due to junction-to-case thermal resistance (0.184 °C/W) and maximum junction temperature limit of 150 °C. Operation above this current requires active cooling or reduced ambient temperature.

Does the ISOTOP package provide electrical isolation between the drain and heatsink?

Yes - the ISOTOP package provides 2.5 kV AC isolation (60 s) between all pins and the metal tab (drain), verified per Table 2. This allows direct mounting to a grounded heatsink without additional insulating hardware, reducing thermal resistance and assembly complexity. The isolation is achieved via molded epoxy encapsulation and internal ceramic insulation layers.

How does the body diode performance compare at elevated junction temperature?

At T_j = 150 °C, the body diode's reverse recovery charge increases to 24.5 µC and t_rr extends to 728 ns (Table 7), versus 14.5 µC and 568 ns at 25 °C. This degradation is fully characterized and accounted for in the device's safe operating area curves (Figure 2), confirming usability in high-temperature bridge applications with appropriate gate timing.

Is the STE145N65M5 suitable for zero-voltage switching (ZVS) topologies?

Yes - its low output capacitance (C_oss = 413 pF) and energy-related equivalent capacitance (C_o(er) = 415 pF) enable reliable ZVS in resonant LLC and phase-shifted full-bridge converters. Verified switching loss data in Figure 13 shows E_on remains stable down to R_G = 1 Ω, confirming compatibility with fast gate drivers required for high-frequency ZVS operation.