STMicroelectronics STPSC40065CWY

Overview

STPSC40065CWY from STMicroelectronics is an AEC-Q101-qualified 650 V, 40 A (RMS) silicon carbide Schottky power diode in TO-247 package, designed for high-efficiency PFC stages in automotive and industrial AC/DC converters. It delivers zero reverse recovery charge, temperature-independent switching, and 1.30 V typical forward voltage at 20 A and 25 °C.

For engineers reviewing the STPSC40065CWY datasheet, STPSC40065CWY pinout, STPSC40065CWY application, or STPSC40065CWY equivalent, key selection criteria include its 650 V V_RRM, 175 °C max junction temperature, low capacitive charge (62 nC at 400 V), negligible ringing, and PPAP-capable qualification for automotive power systems.

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery diodes in high-frequency, high-voltage rectification where reverse recovery losses dominate efficiency. Its wide-bandgap construction eliminates minority-carrier storage, enabling operation up to 175 °C with stable VF and IR across temperature.

The dual-die configuration supports 40 A RMS current handling per device (2 × 20 A per diode), with thermal resistance of 0.60 °C/W (junction-to-case, total) and low junction capacitance (1250 pF at 0 V, 100 pF at 400 V), critical for reducing EMI and snubber losses in >100 kHz PFC topologies.

Key Specifications

Pinout & Package

TO-247 package with three terminals: Anode (A1), Cathode (K), and second Anode (A2). The dual-anode configuration supports parallel internal die connection for enhanced current capability and thermal symmetry.

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 SS12065, STPSC40065CWY uniquely combines dual-anode topology, AEC-Q101 + PPAP support, and lowest total thermal resistance (0.60 °C/W), making it the only option qualified for safety-critical automotive OBC and DC fast charging systems requiring full production traceability.

Availability

STPSC40065CWY is available at Aetrix Electronics and suitable for on-board chargers, industrial PFC modules, and renewable energy inverters requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.

Supply support for STPSC40065CWY 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 PFC and output rectification in automotive and industrial power conversion systems.

FAQ

Is STPSC40065CWY pin-compatible with standard TO-247 silicon diodes?

Yes - it uses the industry-standard TO-247-3L mechanical outline with identical mounting hole spacing (ØP = 3.6 mm), recommended torque (0.8 N·m), and thermal pad footprint. However, its dual-anode configuration requires PCB layout verification to ensure correct A1/A2 routing and avoid unintended parallel paths.

What is the maximum allowable case temperature for continuous 40 A RMS operation?

At 40 A RMS, power dissipation is ~52 W (using P = 1.02 × I_F(AV) + 0.039 × I_F(RMS)²). With R_th(j-c) = 0.60 °C/W and T_j(max) = 175 °C, the maximum allowable case temperature is 143.8 °C - well above typical heatsink limits, confirming robust thermal headroom.

Does STPSC40065CWY require gate drive or external control circuitry?

No - it is a passive uncontrolled power diode with no gate terminal. It operates solely based on forward bias polarity and voltage magnitude. No driver, bias network, or timing control is needed, unlike MOSFETs or IGBTs.

How does its reverse leakage compare to silicon diodes at 150 °C?

At 150 °C and V_R = V_RRM, IR is 280–2000 µA - significantly higher than silicon FRDs (<1 µA), but within expected SiC behavior. This is fully accounted for in PFC efficiency models and does not impact reliability due to the absence of thermal runaway mechanisms in Schottky structures.