STMicroelectronics SCT30N120

Overview

SCT30N120 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 in an HiP247 package. It serves as a high-voltage, high-efficiency switching device in hard-switched and resonant topologies of industrial power converters.

For engineers reviewing the SCT30N120 datasheet, SCT30N120 pinout, SCT30N120 application, or SCT30N120 equivalent, key selection criteria include its 200 °C maximum junction temperature, low 1700 pF C_iss, robust body diode with 140 ns t_rr, and thermal resistance of 0.65 °C/W (junction-to-case).

Technical Context

This SiC MOSFET employs a planar trench-gate structure optimized for high-voltage operation and minimal temperature-dependent R_DS(on) drift - normalized R_DS(on) remains ≤1.0 up to 150 °C and rises only to ~2.0× at 200 °C. Its intrinsic body diode exhibits fast reverse recovery (Q_rr = 140 nC, I_RRM = 2 A) and low forward voltage (V_SD = 3.5 V at 10 A), enabling reliable 3rd-quadrant conduction without external anti-parallel diodes.

The device operates within a safe operating area (SOA) limited by R_DS(on) at short pulse widths (<10 µs) and by thermal constraints at longer durations. Gate drive requirements are defined by a 5 Ω intrinsic gate resistance and 105 nC total gate charge, supporting efficient switching with standard 20 V gate drivers while maintaining robustness against dv/dt-induced turn-on.

Key Specifications

Pinout & Package

The SCT30N120 is housed in the HiP247 package - a thermally enhanced variant of TO-247 with isolated tab, optimized for high-power SiC devices. It features a 20.0 mm × 15.6 mm footprint, 5.45 mm pitch (e), and 14.5 mm lead length (L), enabling direct mounting to heatsinks via the drain-connected metal tab.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3M0065120K, SCT30N120 trades 25 mΩ higher R_DS(on) for simpler 3-pin layout and guaranteed body diode performance; versus IXFH50N120, it delivers verified 3rd-quadrant operation and superior thermal resistance (0.65 vs. ~1.0 °C/W).

Availability

SCT30N120 is available at Aetrix Electronics and suitable for AC-DC converters, motor drives, and solar inverters requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial OEM programs.

Supply support for SCT30N120 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.

SCT30N120 belongs to ST's STPOWER SiC MOSFET product line, engineered specifically for high-efficiency, high-power-density systems operating above 600 V - targeting renewable energy, EV infrastructure, and industrial automation.

FAQ

What gate drive voltage is recommended for SCT30N120?

ST specifies a gate-source voltage range of –10 V to +25 V, with optimal switching performance achieved at V_GS = –2 V (turn-off) and +20 V (turn-on). A minimum V_GS(th) of 1.8 V ensures reliable enhancement-mode operation, and the 5 Ω intrinsic gate resistance supports standard gate drivers without external series resistance in most layouts.

Does SCT30N120 require an external body diode?

No. The device integrates a robust intrinsic SiC body diode characterized for V_SD = 3.5 V at 10 A, t_rr = 140 ns, and Q_rr = 140 nC - validated across –50 °C to 150 °C. This enables reliable 3rd-quadrant conduction in half-bridge and synchronous rectifier configurations without added components.

How does thermal performance compare between HiP247 and standard TO-247?

The HiP247 package delivers R_thJC = 0.65 °C/W - 30–40% lower than standard TO-247 variants - due to enhanced copper tab thickness and optimized internal die attach. This directly translates to ~15 °C lower junction temperature at 45 A continuous current, extending lifetime and enabling higher power density in constrained thermal envelopes.

Can SCT30N120 replace silicon IGBTs in existing 1200 V designs?

Yes - with gate drive and layout adaptation. Its 1200 V rating, 45 A current capability, and SOA compliance allow drop-in replacement in many IGBT-based inverters and UPS systems. However, faster switching demands reduced gate loop inductance and careful attention to Miller capacitance effects, as C_iss and C_rss differ significantly from IGBTs.