STMicroelectronics SCTWA30N120

Overview

SCTWA30N120 from STMicroelectronics is a silicon carbide (SiC) Power MOSFET rated for 1200 V drain-source voltage, 80 mΩ typical R_DS(on) at 20 V_GS, and 45 A continuous drain current at T_C = 25 °C. It operates up to 200 °C junction temperature, features a fast intrinsic body diode with 140 ns reverse recovery time, and is housed in an industry-standard HiP247 long leads package - optimized for high-efficiency AC-DC and DC-DC converters.

For engineers reviewing the SCTWA30N120 datasheet, SCTWA30N120 pinout, SCTWA30N120 application, or SCTWA30N120 equivalent, key selection criteria include its low-temperature-dependent R_DS(on), robust 90 A pulsed drain capability, 0.65 °C/W junction-to-case thermal resistance, and SiC-specific switching energy (E_on/E_off = 500/350 µJ at 800 V).

Technical Context

This SiC MOSFET leverages wide-bandgap material properties to deliver near-flat R_DS(on) across –55 °C to 200 °C (normalized resistance ≤1.0 at 150 °C, ≤2.0 at 200 °C), enabling stable conduction loss in high-temperature power stages. Its gate threshold voltage (1.8–3.5 V) and low gate charge (105 nC total, 40 nC Q_gd) support fast, controllable switching with minimal Miller-induced oscillation risk.

The device integrates a co-packaged SiC body diode with 3.5 V forward voltage at 10 A and <140 ns trr under 100 A/µs di/dt - eliminating need for external anti-parallel diodes in bridge-leg configurations. Safe operating area (SOA) is defined up to 10 ms pulses at 200 °C, limited by R_DS(on) rather than secondary breakdown.

Key Specifications

Pinout & Package

Package: HiP247 long leads - TO-247 variant with extended leads for improved creepage/clearance and mechanical stability in high-voltage PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3M0065120K, SCTWA30N120 trades 15 mΩ higher on-resistance for superior thermal robustness (200 °C vs. 175 °C) and lower C_iss, making it preferable in thermally constrained, hard-switched industrial drives; versus STW48N120, it delivers higher reliability at extreme temperatures but with slightly lower current rating.

Availability

SCTWA30N120 is available at Aetrix Electronics and suitable for AC-DC converters, solar inverters, and uninterruptable power supplies requiring stable component supply across multi-year production cycles.

Supply support for SCTWA30N120 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

SCTWA30N120 belongs to ST's STPOWER SiC MOSFET product line, engineered specifically for high-efficiency, high-power-density systems operating above 1 kW - targeting renewable energy, EV charging, and industrial motor control.

FAQ

What gate drive voltage is recommended for SCTWA30N120?

ST specifies V_GS = –2 V to +20 V absolute maximum, with recommended operating range of –5 V to +20 V. A gate drive of +20 V ensures minimum R_DS(on) (80 mΩ), while –5 V enhances noise immunity and prevents spurious turn-on during high dv/dt events in bridge configurations.

Does SCTWA30N120 require a negative gate voltage to ensure safe turn-off?

Yes - ST recommends applying –2 V to –5 V during off-state to guarantee robust immunity against Miller-induced false turn-on, especially in high-speed, high-dv/dt applications like solar inverters. The device's V_GS(th) (1.8–3.5 V) and low Q_gd (40 nC) make it sensitive to gate coupling without negative bias.

Can SCTWA30N120 replace silicon IGBTs directly in existing designs?

Not without circuit redesign: while pin-compatible in HiP247, its faster switching (19 ns t_d(on), 28 ns t_f) demands lower-inductance gate loops, revised snubbers, and adjusted dead-time (reduced to 50–100 ns). Gate driver peak current must exceed 4 A to charge 105 nC within 50 ns.

What is the maximum allowable case temperature for continuous operation?

The datasheet specifies 34 A continuous drain current at T_C = 100 °C, corresponding to T_j = 200 °C. Operation beyond 100 °C case temperature is not rated - thermal design must ensure T_C ≤ 100 °C under worst-case load and ambient conditions to maintain reliability and SOA compliance.