STMicroelectronics STPSC40H12CWL

Overview

STPSC40H12CWL from STMicroelectronics is a 1200 V, 40 A dual-die silicon carbide Schottky power rectifier in TO-247 LL package, designed for high-efficiency PFC and secondary-side rectification in hard-switching topologies. It delivers negligible reverse recovery, temperature-independent switching, 1.35 V typical forward voltage at 20 A, and operates up to 175 °C junction temperature-enabling compact, high-power solar inverters and EV on-board chargers.

For engineers reviewing the STPSC40H12CWL datasheet, STPSC40H12CWL pinout, STPSC40H12CWL application, or STPSC40H12CWL equivalent, key selection criteria include its zero-recovery behavior, 129 nC capacitive charge at 800 V, 0.20 °C/W per-device thermal resistance, robust 140 A non-repetitive surge rating, and ECOPACK2 compliance for industrial and automotive-grade power systems.

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery and ultrafast diodes in high-frequency, high-voltage DC/DC and AC/DC stages. Its wide band-gap structure eliminates minority-carrier storage, resulting in no reverse recovery current and minimal voltage ringing-even under full-load transient conditions at elevated temperatures.

The dual-die configuration (2 × 20 A) shares a common cathode (K) and isolated anodes (A1, A2), enabling independent half-bridge leg operation or parallel conduction paths. Thermal performance is optimized via low R_th(j-c) (0.20 °C/W typ. per device) and direct case-to-heatsink conduction through the TO-247 LL package's metal tab.

Key Specifications

Pinout & Package

Supplied in TO-247 long leads (TO-247 LL) package with insulated metal tab for direct heatsink mounting. Mechanical dimensions comply with ST's ECOPACK2 environmental standard. Recommended torque: 0.8 N·m (max 1.0 N·m).

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3D04065E and SS120120A, STPSC40H12CWL uniquely combines 1200 V rating, dual isolated anodes, and industry-low 1.35 V V_F-making it optimal for space-constrained, high-efficiency PFC and OBC designs where voltage margin, layout flexibility, and conduction loss are co-critical.

Availability

STPSC40H12CWL is available at Aetrix Electronics and suitable for solar inverters, EV on-board chargers, and telecom rectifier modules requiring stable component supply, long-lifecycle support, and ECOPACK2-compliant sourcing.

Supply support for STPSC40H12CWL 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.

This device belongs to ST's STPSC family of silicon carbide Schottky diodes-engineered specifically for high-efficiency, high-reliability power conversion in renewable energy, electric mobility, and datacenter infrastructure.

FAQ

What is the maximum continuous case temperature for reliable operation?

The STPSC40H12CWL supports continuous operation with case temperature up to 150 °C, verified by its rated I_F(AV) = 40 A at T_c = 150 °C (δ = 1). Exceeding this requires derating per Figure 3 in DS12030, and sustained operation above 150 °C risks accelerated parameter drift and reduced lifetime.

Can STPSC40H12CWL replace a silicon fast recovery diode in an existing 1200 V design?

Yes-direct replacement is feasible if PCB layout accommodates TO-247 LL mechanical dimensions and thermal interface meets 0.20 °C/W R_th(j-c). No gate drive or snubber redesign is needed due to zero reverse recovery, but verify layout parasitics do not induce oscillation from faster edge rates.

Is the dual-anode configuration internally isolated or shared?

The two anodes (A1 and A2) are electrically isolated within the package-each connects to a separate SiC die sharing only the common cathode (K). This enables true independent switching, essential for interleaved PFC or dual-phase rectification without external isolation components.

Does ST provide SPICE models for this diode?

Yes-ST provides validated PSpice and LTspice models for STPSC40H12CWL in the "Power Discrete" section of their official website (st.com), including thermal-aware behavioral models covering V_F, Q_CJ, and leakage across –40 °C to 175 °C for accurate loss simulation.