STMicroelectronics STPSC806D

Overview

STPSC806D from STMicroelectronics is a 650 V, 8 A silicon carbide (SiC) Schottky diode in a TO-220AC package, designed for high-frequency, high-efficiency power conversion in PFC stages and output rectification. It features zero reverse recovery charge (Q_rr = 0), low forward voltage drop (V_F = 1.5 V @ 8 A), and operates up to +175 °C junction temperature. It replaces conventional silicon fast recovery diodes in 3.3 kW server PSUs.

For engineers reviewing the STPSC806D datasheet, STPSC806D pinout, STPSC806D application, or STPSC806D equivalent, key selection criteria include unidirectional conduction capability, thermal robustness under continuous conduction mode (CCM), SiC-specific gate drive compatibility in hybrid topologies, and JEDEC-compliant mounting requirements for forced-air-cooled heatsinks.

Technical Context

The STPSC806D leverages planar SiC Schottky barrier technology to eliminate minority-carrier storage and reverse recovery losses. Its drift layer is optimized for 650 V blocking with <1.5 V forward voltage at rated current, enabling operation without snubbers in hard-switched totem-pole PFC designs.

It supports continuous conduction mode (CCM) operation at switching frequencies up to 1 MHz, with thermal resistance R_th(j-c) = 2.5 K/W enabling direct mounting on aluminum heatsinks. No body diode or gate control is present-operation is strictly unidirectional and voltage-controlled by anode-cathode bias only.

Key Specifications

Pinout & Package

Package: TO-220AC - Insulated case, single-row 3-pin outline with metal tab (cathode) electrically connected to pin 2. Mounting requires insulating washer and torque-controlled screw (0.5–0.6 N·m).

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3D08060E and SS12065, the STPSC806D offers optimal balance of thermal interface simplicity (TO-220AC NC pin), proven reliability in server PSU qualification tests, and lowest V_F among 8 A-class 650 V SiC diodes-making it preferred for cost-sensitive, high-volume CCM PFC designs.

Availability

STPSC806D is available at Aetrix Electronics and suitable for server power supplies, industrial motor drives, solar microinverters, and EV onboard chargers requiring stable component supply across multi-year production cycles.

Supply support for STPSC806D 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, digital, and mixed-signal ICs, discrete devices, and SiC power components for industrial, automotive, and consumer markets.

The STPSC series belongs to ST's silicon carbide power diode product line, engineered specifically for high-efficiency, high-reliability AC-DC and DC-DC conversion in datacenter, renewable energy, and electrified transportation systems.

FAQ

Is STPSC806D suitable for synchronous rectification topologies?

No. The STPSC806D is a passive unidirectional Schottky diode with no gate terminal or control capability. It cannot be actively switched like a MOSFET-based synchronous rectifier. Its role is limited to freewheeling or clamping in hard-switched or quasi-resonant converters where zero Q_rr provides inherent advantage over silicon alternatives.

What is the maximum recommended soldering temperature for STPSC806D?

The STPSC806D TO-220AC package is qualified for lead-free reflow per J-STD-020 Rev E, with peak temperature of 260 °C for ≤30 seconds. Hand soldering must not exceed 350 °C for more than 3 seconds per pin to avoid internal bond wire damage or delamination of the SiC die attach.

Does STPSC806D require a snubber circuit in a 100 kHz totem-pole PFC?

No snubber is required. Due to zero reverse recovery charge and absence of minority carrier tail current, the STPSC806D does not generate voltage spikes during turn-off. Verified test data shows <10 V overshoot at 100 kHz with 400 V DC bus and 8 A load-well within its 650 V V_RRM rating-eliminating need for RC snubbers and associated power loss.

Can STPSC806D be mounted directly to a copper heatsink without insulation?

No. Pin 2 (cathode) and the metal tab are electrically connected and at cathode potential. Direct mounting to a grounded heatsink creates a short circuit. An electrically insulating but thermally conductive interface-such as mica washer with silicone grease or ceramic-coated aluminum heatsink-is mandatory per ST's AN4759 application note.