STMicroelectronics STPSC20065DI

Overview

STPSC20065DI from STMicroelectronics is a 650 V, 20 A average forward current silicon carbide Schottky diode in an insulated TO-220AC package, featuring zero reverse recovery charge, 1.30 V typical forward voltage at 20 A and 25 °C, 2500 V_rms insulation rating, and operation up to 175 °C junction temperature-designed specifically for high-efficiency PFC stages in industrial AC-DC power supplies.

For engineers reviewing the STPSC20065DI datasheet, STPSC20065DI pinout, STPSC20065DI application, or STPSC20065DI equivalent, key selection criteria include its temperature-independent switching behavior, low capacitive charge (62 nC at 400 V), high surge robustness (83 A repetitive peak forward current at T_C = 85 °C), and insulated thermal interface suitability for grounded heatsink designs.

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery diodes in continuous conduction mode (CCM) and transition mode (TM) PFC circuits. Its wide bandgap enables a 650 V blocking rating with no minority-carrier storage, eliminating reverse recovery losses and associated EMI.

The TO-220AC Ins package integrates a 2500 V_rms isolation barrier between the die and mounting base, enabling direct attachment to live-chassis heatsinks without additional insulating hardware-critical for compact, high-density server and telecom rectifier designs.

Key Specifications

Pinout & Package

TO-220AC Ins package: single-sided insulated mounting base; electrically isolated tab; 3-pin outline with anode (A), cathode (K), and insulated mounting surface (no electrical terminal). Thermal path flows from die → insulated copper base → heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3D02065E and SS120065, STPSC20065DI uniquely combines certified 2500 V_rms insulation, industry-leading 1.30 V forward voltage, and robust 83 A surge capability-making it optimal for space-constrained, safety-critical PFC designs where thermal, electrical, and mechanical integration must be simultaneously optimized.

Availability

STPSC20065DI is available at Aetrix Electronics and suitable for server power supply PFC stages, industrial motor drive input rectification, telecom rectifier modules, and renewable energy grid-tie inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STPSC20065DI 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.

The STPSC series belongs to ST's silicon carbide power diode product line, engineered specifically for high-efficiency, high-reliability PFC and soft/hard-switched rectification in industrial and telecom power systems.

FAQ

What is the maximum allowable case temperature for continuous 20 A operation?

The datasheet specifies I_F(AV) = 20 A at T_C = 85 °C for the TO-220AC Ins package. At this case temperature, junction temperature remains within the 175 °C limit assuming R_th(j-c) = 1.60 °C/W and power dissipation of ~26 W. Operation above 85 °C requires derating per Figure 4 in the datasheet.

Does the insulated package require thermal paste between the tab and heatsink?

Yes-thermal interface material (TIM) is required. The insulated tab is a copper base coated with ceramic or polymer dielectric; TIM ensures efficient heat transfer while maintaining electrical isolation. ST recommends standard silicone-based or phase-change TIMs compatible with 175 °C operation.

Can STPSC20065DI replace a standard silicon fast recovery diode in an existing PFC design?

Yes, with layout verification. It offers identical pinout and footprint to TO-220AC silicon diodes, but exhibits faster switching, lower V_F, and no reverse recovery. Layout adjustments may include reducing snubber components and verifying gate drive stability due to reduced displacement current.

Is the 2500 V_rms insulation rating certified to any safety standard?

The 2500 V_rms isolation is specified per IEC 60747-5-2 and verified during qualification. It meets reinforced insulation requirements for basic functional isolation in end equipment complying with IEC 62368-1 and UL 62368-1, provided creepage/clearance distances in the PCB layout comply with the standard's pollution degree and material group requirements.