STMicroelectronics SCTW40N120G2V

Overview

SCTW40N120G2V from STMicroelectronics is a silicon carbide (SiC) Power MOSFET rated for 1200 V drain-source voltage, 62 mΩ typical R_DS(on) at 18 V gate drive, and 36 A continuous drain current at T_C = 25 °C. It features an ultra-fast intrinsic body diode, 61 nC total gate charge, and operates up to 200 °C junction temperature - enabling high-efficiency, high-frequency switching in high-voltage power conversion stages.

For engineers reviewing the SCTW40N120G2V datasheet, SCTW40N120G2V pinout, SCTW40N120G2V application, or SCTW40N120G2V equivalent, key selection criteria include its low C_iss (1233 pF), minimal temperature-dependent R_DS(on) drift, robust 108 A pulsed current capability, and HiP247 package thermal resistance of 0.63 °C/W for demanding industrial and renewable energy systems.

Technical Context

This SiC MOSFET employs ST's second-generation trench-gate technology, delivering stable switching energy across temperature (E_on = 243 µJ, E_off = 48 µJ at 800 V/20 A) with near-constant loss vs. T_J. Its gate threshold voltage (1.9–4.9 V) and low Q_gd/Q_gs ratio (25/13 nC) support clean turn-on/turn-off with reduced Miller-induced oscillation risk.

The device integrates a co-packaged SiC Schottky-like body diode with 15 ns reverse recovery time and only 77 nC Q_rr, eliminating need for external anti-parallel diodes in hard-switched topologies. Safe operating area remains unclamped up to 100 µs pulses at 200 °C, validated by SOA curves across T_C and pulse width.

Key Specifications

Pinout & Package

Supplied in the HiP247 package - a thermally optimized, isolated-tab TO-247 variant with 0.63 °C/W junction-to-case thermal resistance and 20.0 mm × 15.6 mm footprint. The package supports high-current PCB mounting and direct heatsink attachment via the exposed drain tab.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3M0065120K, SCTW40N120G2V offers 12% lower gate charge and tighter R_DS(on) distribution; versus IXFH40N120, it delivers 65% lower E_off and enables 2.5× higher switching frequency - directly translating to smaller magnetics and improved power density.

Availability

SCTW40N120G2V is available at Aetrix Electronics and suitable for industrial motor control, solar string inverters, and EV onboard chargers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.

Supply support for SCTW40N120G2V 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, with R&D and manufacturing operations across Europe, Asia, and the Americas, serving automotive, industrial, and power electronics markets.

This device belongs to ST's STPOWER SiC portfolio - engineered specifically for high-efficiency, high-reliability power conversion in 800 V+ systems, emphasizing ruggedness, thermal resilience, and ease of gate drive integration.

FAQ

What gate voltage range is recommended for reliable operation?

The SCTW40N120G2V specifies a recommended gate-source voltage range of –5 V to +18 V. A minimum –5 V negative turn-off bias ensures robust immunity against spurious turn-on during high dV/dt commutation events, while +18 V maximizes R_DS(on) performance without exceeding oxide reliability limits. Operating outside this range risks accelerated gate oxide degradation or incomplete turn-off.

Can this MOSFET replace a 1200 V IGBT in existing designs?

Yes - but with gate drive and layout adjustments. Its lower gate charge (61 nC vs. ~300 nC for typical IGBTs) demands faster, lower-impedance gate drivers; its fast switching requires minimized loop inductance and careful Miller clamping. The integrated SiC body diode eliminates need for external anti-parallel diodes, simplifying bill-of-materials in bridge configurations.

What is the maximum allowable case temperature for continuous operation?

At T_C = 100 °C, the device supports 27 A continuous drain current - verified by derating curves in DS13504. With R_thJC = 0.63 °C/W and maximum T_J = 200 °C, the theoretical upper T_C limit is 137 °C (200 – 0.63 × 100), but ST recommends limiting T_C to ≤115 °C for long-term reliability and SOA margin in production systems.

Does the HiP247 package require special PCB layout considerations?

Yes - the exposed drain tab must be isolated from the PCB ground plane using a dielectric thermal pad or insulating washer. Trace width for source and gate connections should exceed 1.5 mm to limit parasitic inductance, and gate loop area must be minimized (<10 mm²) to prevent oscillation. Thermal vias under the tab (≥12× 0.3 mm diameter) are strongly recommended for optimal heat transfer to the heatsink.