STMicroelectronics STPSC20H12CWY

Overview

STPSC20H12CWY from STMicroelectronics is a dual-die 1200 V, 20 A (2 × 10 A) silicon carbide Schottky power rectifier in TO-247 package, designed for high-efficiency PFC and resonant LLC secondary-side rectification. It delivers negligible reverse recovery, temperature-independent switching, 1.35 V typical forward voltage at 10 A/25 °C, and operates up to 175 °C junction temperature-enabling compact, high-frequency OBC and EV charging station designs.

For engineers reviewing the STPSC20H12CWY datasheet, STPSC20H12CWY pinout, STPSC20H12CWY application, or STPSC20H12CWY equivalent, key selection criteria include its zero-recovery behavior, 725 pF junction capacitance at 0 V, 57 nC capacitive charge at 800 V, robust 71 A non-repetitive surge rating, and AEC-Q101 qualification for automotive on-board chargers.

Technical Context

This dual-die SiC Schottky diode eliminates minority-carrier storage and reverse recovery losses by virtue of its majority-carrier conduction mechanism. Its wide bandgap enables stable 1200 V blocking with low VF and minimal temperature drift in both VF and leakage current.

The device integrates two independent 10 A diodes in a single TO-247 package, sharing common cathode connection per internal configuration. Thermal resistance is specified at 0.35 °C/W (typ.) junction-to-case for the full device, supporting high-power density layouts in hard-switching and resonant topologies.

Key Specifications

Pinout & Package

STPSC20H12CWY uses a standard 3-pin TO-247 package with isolated anode terminals and shared cathode. The package features epoxy rated UL94 V0, 0.8 N·m recommended mounting torque, and optimized thermal path via case bottom.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3D20120D and SS12012A, STPSC20H12CWY offers superior thermal resistance (0.35 °C/W), tighter VF consistency, and full PPAP support-making it the preferred choice for automotive OBCs requiring production traceability and thermal headroom.

Availability

STPSC20H12CWY is available at Aetrix Electronics and suitable for on-board battery chargers, EV charging stations, resonant LLC converters, and power factor correction circuits requiring stable component supply, AEC-Q101 compliance, and high-temperature operation.

Supply support for STPSC20H12CWY 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 automotive, industrial, 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 automotive electrification and renewable energy infrastructure.

FAQ

What is the thermal resistance junction-to-case for STPSC20H12CWY?

The typical junction-to-case thermal resistance is 0.35 °C/W for the full device (20 A), measured with both dies active and case mounted to a heatsink. Maximum value is 0.48 °C/W per datasheet Table 2. This value assumes proper mounting torque (0.8 N·m) and thermal interface material with ≤0.1 °C·in²/W resistance.

Does STPSC20H12CWY require a gate driver or external control signal?

No. STPSC20H12CWY is a passive uncontrolled rectifier with no gate terminal. It conducts when forward-biased and blocks when reverse-biased-no drive circuitry, timing signals, or control logic is needed. Its operation is fully autonomous and determined solely by applied voltage polarity and magnitude.

Can STPSC20H12CWY be used in parallel with another identical device?

Yes, but with current-sharing considerations. Each die is internally matched, but inter-device paralleling requires symmetrical PCB layout, equal trace inductance, and thermal coupling to avoid imbalance. ST recommends using external ballast resistors (<5 mΩ) or dedicated current-sharing transformers for >40 A total current.

Is the TO-247 package of STPSC20H12CWY lead-free and RoHS compliant?

Yes. STPSC20H12CWY carries ECOPACK2 certification, confirming full compliance with EU RoHS Directive 2011/65/EU, including lead-free terminations, halogen-free molding compound, and absence of SVHC substances above threshold limits.