STMicroelectronics STPSC20065D

Overview

STPSC20065D from STMicroelectronics is a 650 V, 20 A average forward current silicon carbide Schottky diode in TO-220AC package, featuring zero reverse recovery charge, temperature-independent switching, and 1.30 V typical forward voltage at 20 A and 25 °C - optimized for high-efficiency PFC stages in industrial AC-DC power supplies.

For engineers reviewing the STPSC20065D datasheet, STPSC20065D pinout, STPSC20065D application, or STPSC20065D equivalent, key selection criteria include its 175 °C maximum junction temperature, 2500 V_rms insulation rating (TO-220AC Ins variant), 7 pF typical package capacitance, and robust 90 A non-repetitive surge capability at 25 °C.

Technical Context

This SiC Schottky diode eliminates reverse recovery losses entirely due to its majority-carrier conduction mechanism, enabling clean hard-switching waveforms with negligible ringing. Its capacitive turn-off behavior remains stable across –40 °C to +175 °C operating range, unlike silicon diodes whose Q_rr degrades with temperature.

Designed specifically for continuous-conduction-mode (CCM) and transition-mode (TM) PFC boost converters, it delivers low conduction loss via 1.30 V V_F (25 °C) and 1.5 V V_F (175 °C), while sustaining 650 V V_RRM with <300 µA reverse leakage at 25 °C and 650 V.

Key Specifications

Pinout & Package

STPSC20065D uses the TO-220AC package: single-ended, 3-lead, through-hole, non-insulated case (case electrically connected to cathode). Mounting hole accepts M3 screw with recommended torque of 0.55 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3D02060E and SS12065, STPSC20065D offers lower thermal resistance and a dedicated insulated variant (STPSC20065DI), making it optimal for high-reliability, thermally constrained PFC designs where mechanical mounting flexibility and safety isolation are required.

Availability

STPSC20065D is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and EV onboard chargers requiring stable component supply, long-term manufacturability, and traceable sourcing for high-volume production.

Supply support for STPSC20065D 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 PFC and power conversion applications demanding zero recovery loss and elevated temperature operation.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STPSC20065D is rated for I_F(AV) = 20 A at T_C = 140 °C (DC), with absolute maximum junction temperature of 175 °C. Thermal design must ensure R_th(j-c) + R_th(c-sink) ≤ (175 – T_amb)/20 W, using the typical 0.60 °C/W junction-to-case resistance. Derating is required above 140 °C case temperature.

Does STPSC20065D require a gate resistor or snubber network?

No - as a Schottky diode, it has no gate and requires no gate resistor. However, a small RC snubber (e.g., 100 Ω + 100 pF) across anode–cathode is recommended in high-dV/dt PFC applications (>50 V/ns) to damp residual parasitic oscillation from PCB layout inductance interacting with C_j.

Can STPSC20065D replace a standard silicon fast recovery diode directly?

Yes, in most PFC boost topologies - provided layout accommodates identical TO-220AC footprint and thermal interface. Key advantages include immediate elimination of Q_rr loss, reduced EMI filtering burden, and improved efficiency. No circuit re-tuning is needed, though gate driver timing may be adjusted to exploit faster switching.

Is the TO-220AC tab electrically isolated in STPSC20065D?

No - the metal tab (case) is internally connected to the cathode terminal. For grounded heatsink mounting, electrical isolation (e.g., mica washer + thermal grease) is mandatory. For isolation-critical designs, use STPSC20065DI (TO-220AC Ins), which provides 2500 V_rms insulation between tab and cathode.