STMicroelectronics SCT020HU120G3AG

Overview

SCT020HU120G3AG from STMicroelectronics is an AEC-Q101 qualified silicon carbide Power MOSFET in HU3PAK package, rated for 1200 V drain-source voltage, 18.5 mΩ typical R_DS(on) at 18 V V_GS, and 100 A continuous drain current at T_C = 25 °C. It serves as a high-efficiency main switching device in EV traction inverters, delivering low conduction loss and fast switching with robust intrinsic body diode performance.

For engineers reviewing the SCT020HU120G3AG datasheet, SCT020HU120G3AG pinout, SCT020HU120G3AG application, or SCT020HU120G3AG equivalent, key selection criteria include its 1200 V blocking capability, 18.5 mΩ R_DS(on) at 175 °C, 121 nC total gate charge, 22.6 ns reverse recovery time, and HU3PAK thermal resistance of 0.27 °C/W - all critical for high-power automotive SiC inverter design.

Technical Context

This SiC MOSFET employs ST's third-generation trench-gate technology to achieve stable R_DS(on) across -55 °C to 175 °C junction temperature, with normalized on-resistance variation under 2.5× over full range. Its low C_iss (3465 pF) and C_rss (13.5 pF) enable high dV/dt immunity and reduced Miller effect during hard-switching.

The integrated SiC body diode exhibits 3 V forward voltage at 50 A and 22.6 ns t_rr with 15.4 A I_RRM, enabling synchronous rectification without external diodes in DC/DC converters. Gate drive requirements are defined by V_GS operating range (-5 to +18 V) and ±100 nA leakage up to 22 V.

Key Specifications

Pinout & Package

HU3PAK is a 7-terminal surface-mount power package with exposed drain tab (TAB) for direct thermal interface and low-inductance layout. The metal tab serves as primary heat path and electrical drain connection, while terminals 1–7 provide gate, driver source, and power source connections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3M0065120K and IXFH40N120X2, SCT020HU120G3AG delivers 3.5× lower conduction loss and 45 % lower junction-to-case thermal resistance, enabling higher power density in liquid-cooled automotive traction inverters where space and thermal budget are constrained.

Availability

SCT020HU120G3AG is available at Aetrix Electronics and suitable for electric vehicle traction inverters, onboard chargers, and HEV DC/DC converters requiring stable component supply, automotive-grade reliability, and high-temperature operational continuity.

Supply support for SCT020HU120G3AG 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, specializing in automotive, industrial, and power electronics solutions with vertical manufacturing capabilities and broad IP portfolio.

This device belongs to ST's STPOWER SiC MOSFET product line, engineered specifically for high-efficiency, high-power-density EV and renewable energy systems demanding 1200 V blocking and sub-20 mΩ on-resistance.

FAQ

What is the maximum recommended gate-source voltage for reliable operation?

The absolute maximum V_GS is -10 V to +22 V, but the recommended operating range is -5 V to +18 V. Operating beyond +18 V risks accelerated gate oxide degradation, while gate drive below -5 V may cause incomplete turn-off under high dV/dt. ST specifies 15 V nominal gate drive for optimal R_DS(on) and lifetime balance.

Does the HU3PAK package require solder paste stencil optimization for thermal pad attachment?

Yes - the exposed drain TAB requires ≥80 % solder coverage with minimum 150 µm paste thickness and 5–7 mm² thermal via array (0.3 mm diameter, 0.8 mm pitch) beneath the pad. ST recommends ENIG finish and reflow profile peaking at 245 °C for void-free attachment critical to achieving 0.27 °C/W R_thJC.

How does the intrinsic body diode performance compare to discrete SiC Schottky diodes?

At 50 A, the body diode exhibits 3 V forward drop and 22.6 ns t_rr, matching mid-range 1200 V SiC Schottkys (e.g., C4D08120D). Unlike discrete diodes, it shares the same die and thermal path, eliminating thermal mismatch and parasitic inductance - enabling tighter dead-time control and improved ZVS margin in bridge topologies.

Is the driver source (pin 2) mandatory for gate drive implementation?

Yes - pin 2 must be connected to the gate driver's source reference to enable Kelvin sensing. Using power source pins (3–7) as gate return introduces source inductance that degrades switching speed and causes oscillation. ST's STEVAL-IPFC12V1 evaluation board demonstrates mandatory separation of driver and power source returns.