STMicroelectronics STPSC4H065D

Overview

STPSC4H065D from STMicroelectronics is a 4 A, 650 V silicon carbide (SiC) Schottky power diode in TO-220AC package, designed for high-frequency hard-switching PFC and DC-DC converters. It delivers zero reverse recovery charge, temperature-independent switching, 175 °C max junction temperature, 1.56 V typical forward voltage at 4 A/25 °C, and 2500 VRMS insulation rating - enabling robust operation in LLC resonant and boost topologies.

For engineers reviewing the STPSC4H065D datasheet, STPSC4H065D pinout, STPSC4H065D application, or STPSC4H065D equivalent, key selection criteria include its 650 V blocking capability, 38 A non-repetitive surge rating, low 200 pF junction capacitance at 0 V, insulated package option, and ECOPACK®2 compliance for industrial-grade thermal and environmental reliability.

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery diodes in high-efficiency AC-DC front-ends. Its wide bandgap enables a 650 V rating with no minority-carrier storage, eliminating reverse recovery losses and associated EMI. The device operates up to 175 °C junction temperature with stable VF and IR characteristics across temperature.

Thermal performance is defined by Rth(j-c) = 2.7 °C/W (max) in TO-220AC, supporting conduction-cooled mounting on heatsinks. Dynamic behavior is dominated by capacitive turn-off (Qcj = 12.5 nC at 400 V), with negligible ringing due to absence of tail current - critical for >100 kHz PFC stages and synchronous rectification circuits.

Key Specifications

Pinout & Package

TO-220AC package: single-ended, 3-lead outline with isolated tab (mechanically connected to cathode). Mounting via M3 screw (0.55 N·m recommended torque); epoxy meets UL 94 V0. Insulated variant (STPSC4H065DI) provides 2500 VRMS isolation between tab and leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3D04065E, STPSC4H065D offers certified 2500 VRMS insulation and ECOPACK®2 compliance, while SS14HE3/57T fails basic voltage and temperature requirements - making STPSC4H065D the sole viable choice for insulated, high-reliability 650 V PFC designs.

Availability

STPSC4H065D is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, and EV onboard chargers requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp-up.

Supply support for STPSC4H065D 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 analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

This diode belongs to ST's STPSC family of SiC Schottky rectifiers, engineered specifically for high-efficiency, high-reliability AC-DC conversion in datacenter, telecom, and renewable energy systems where thermal stability and zero-recovery performance are mandatory.

FAQ

Is STPSC4H065D pin-compatible with standard silicon fast recovery diodes in TO-220AC?

No - STPSC4H065D uses a 3-lead TO-220AC configuration where the metal tab is internally connected to the anode, unlike most silicon FRDs with cathode-connected tabs. This requires layout revision to avoid shorting the anode to ground when using existing heatsink mounting schemes.

What is the maximum allowable case temperature for continuous 4 A operation?

The datasheet specifies I_F(AV) = 4 A at T_c = 145 °C for TO-220AC package. Exceeding this temperature risks exceeding the 175 °C maximum junction temperature, especially with Rth(j-c) = 2.7 °C/W - thermal design must ensure T_c ≤ 145 °C under worst-case ambient and airflow conditions.

Does STPSC4H065D require a gate resistor or snubber network?

No - as a Schottky diode with no minority carriers, it exhibits purely capacitive turn-off behavior and generates negligible voltage overshoot or ringing. Snubbers are unnecessary unless parasitic layout inductance exceeds 20 nH, which is uncommon in properly routed PFC PCBs.

Can STPSC4H065D be used in place of STPSC4H065DI for insulated mounting?

No - STPSC4H065D has no internal insulation; its tab is electrically connected to the anode. Using it in place of the insulated STPSC4H065DI on a grounded heatsink creates a direct short. Only STPSC4H065DI or external insulating hardware (e.g., mica washer + shoulder washer) enables safe grounded mounting.