STMicroelectronics STTH3006DPI

Overview

STTH3006DPI from STMicroelectronics is a 600V hyperfast tandem boost diode composed of two series-connected 300V silicon dice in a single DOP3I insulated package, optimized for continuous-conduction-mode (CCM) power factor correction (PFC) stages and hard-switching converters. It delivers 32 A RMS forward current, 25 ns typical reverse recovery time at 25°C, and 6.7 A peak reverse recovery current at 125°C under high dIF/dt conditions.

For engineers reviewing the STTH3006DPI datasheet, STTH3006DPI pinout, STTH3006DPI application, or STTH3006DPI equivalent, key selection criteria include its 2.4 V max forward voltage at 150°C, 1.3 °C/W junction-to-case thermal resistance, 2500 VRMS insulation rating, and proven performance in high-dIF/dt PFC boost circuits where MOSFET loss reduction and heatsink downsizing are critical.

Technical Context

The STTH3006DPI implements a tandem die architecture with matched static and dynamic characteristics across both internal 300V diodes, ensuring balanced voltage sharing and thermal equilibrium. Its hyperfast recovery (25 ns typ. trr at 25°C, 45 ns at high dIF/dt) and soft recovery behavior (S = 0.3) minimize switching noise and EMI in high-frequency PFC stages.

Designed specifically for CCM boost topologies, it supports dIF/dt up to –200 A/µs while maintaining low Qrr (145 nC typ.) and controlled VFP (6 V transient peak), enabling reliable operation alongside fast-switching MOSFETs without snubbers in industrial and server power supplies.

Key Specifications

Pinout & Package

STTH3006DPI uses the DOP3I package: an insulated TO-247-compatible outline with electrically isolated collector tab (2500 VRMS isolation), enabling direct mounting on the same heatsink as the associated MOSFET. The package weighs 4.46 g and features a 20.4–21.1 mm body length (G dimension).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage hyperfast boost diode applications.

Compared with STTH30L06D and MUR3060CT, STTH3006DPI uniquely combines tandem die voltage sharing, 25 ns trr, 2500 VRMS insulation, and 1.3 °C/W thermal resistance-making it the only option enabling snubberless, shared-heatsink, high-density CCM PFC designs above 1 kW.

Availability

STTH3006DPI is available at Aetrix Electronics and suitable for server power supply PFC stages, industrial motor drive input rectifiers, and telecom rectifier modules requiring stable component supply, long-lifecycle support, and traceable sourcing for high-reliability deployments.

Supply support for STTH3006DPI 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 STTH series targets high-efficiency power conversion systems, with the "H" variant specifically engineered for hyperfast, low-loss boost diode applications in CCM PFC and high-dIF/dt switching topologies.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The STTH3006DPI has a maximum operating junction temperature of +150°C, validated across all electrical parameters including trr, Qrr, and VF. This rating is maintained under full IF(RMS) = 32 A load with Rth(j-c) = 1.3 °C/W and case temperature ≤ 111°C, enabling operation in sealed industrial enclosures without forced cooling.

Can STTH3006DPI be mounted directly on the same heatsink as the PFC MOSFET?

Yes-the DOP3I package provides 2500 VRMS electrical isolation between the internal die and the metal tab, allowing safe, direct mounting on the same heatsink as a high-side MOSFET without risk of short circuit. This eliminates insulating pads and reduces thermal resistance by up to 0.4 °C/W versus conventional isolated mounting methods.

How does the tandem die structure improve reliability over single-die 600 V diodes?

The tandem structure uses two matched 300V dice in series, ensuring equal voltage distribution under transient and temperature-varying conditions. This prevents localized overstress and premature failure seen in single-die 600V devices, especially during fast dIF/dt events or uneven thermal gradients-extending lifetime in high-power PFC applications by >2× per FIT analysis.

What is the recommended gate drive layout consideration when using STTH3006DPI with fast Si MOSFETs?

Due to its 16 pF junction capacitance and 25 ns trr, STTH3006DPI generates minimal displacement current during reverse recovery. Layout best practice is to minimize loop area between diode cathode, MOSFET source, and driver ground; no gate resistor adjustment is needed beyond standard Si MOSFET values (e.g., 10–22 Ω), as VFP remains ≤6 V even at –200 A/µs dIF/dt.