STMicroelectronics STTH3006D

Overview

STTH3006D from STMicroelectronics is a 600 V, 30 A ultrafast high-voltage rectifier diode using Turbo 2 technology, optimized for boost and freewheeling roles in continuous-conduction-mode PFC stages and hard-switching power supplies. It delivers 1.10 V typical forward voltage at 150 °C, 50 ns maximum reverse recovery time, and 1.7 °C/W junction-to-case thermal resistance in DOP3I insulated package.

For engineers reviewing the STTH3006D datasheet, STTH3006D pinout, STTH3006D application, or STTH3006D equivalent, key selection criteria include reverse recovery performance under high dIF/dt, conduction loss modeling (P = 1.07 × IF(AV) + 0.011 × IF²(RMS)), thermal management in TO-247–derived insulated packages, and suitability for 600 V industrial SMPS and server PSU front-end designs.

Technical Context

This device implements an ultrafast soft-recovery epitaxial structure with controlled minority-carrier lifetime, enabling low trr (≤50 ns) and low IRM (≤11 A) under high dIF/dt (−100 A/µs) at 125 °C junction temperature. Its softness factor remains stable up to 500 A/µs, minimizing EMI in high-frequency switching topologies.

The DOP3I package provides 2500 VRMS insulation and 1.7 °C/W Rth(j-c), supporting direct heatsink mounting without additional isolation hardware. Conduction losses are quantified via a validated empirical equation rather than fixed VF curves alone.

Key Specifications

Pinout & Package

DOP3I is an insulated variant of the TO-247 outline with integral ceramic isolation barrier and screw-mount terminals. It features two main terminals (anode and cathode) plus a dedicated isolated mounting tab for direct heatsink attachment at 2500 VRMS isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast high-voltage rectifier applications.

Compared with STTH3006D, STTH30L06D improves conduction efficiency without sacrificing speed or footprint, while IXYS MUR3060CT trades insulation and recovery speed for lower procurement cost in non-isolated thermal designs.

Availability

STTH3006D is available at Aetrix Electronics and suitable for server power supply PFC stages, industrial AC-DC front ends, solar inverter DC-link clamping, and medical-grade AC-DC converters requiring stable component supply and long-term lifecycle support.

Supply support for STTH3006D 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The STTH series belongs to ST's high-voltage power diode product line, engineered specifically for high-efficiency, high-reliability switching power conversion in industrial and computing infrastructure applications.

FAQ

What is the maximum recommended mounting torque for the STTH3006D in DOP3I package?

The DOP3I package specifies a recommended torque range of 0.9 to 1.2 N·m for the mounting screw. Exceeding 1.2 N·m risks cracking the ceramic isolation layer or deforming the metal tab, compromising both thermal performance and 2500 VRMS insulation integrity. Always use a calibrated torque driver and verify flatness of the heatsink surface before assembly.

How does the STTH3006D's soft recovery behavior affect EMI in PFC designs?

With a softness factor below 0.6 across 100–500 A/µs dIF/dt, the STTH3006D limits di/dt during reverse recovery, reducing high-frequency spectral content in voltage transients. This directly lowers common-mode noise coupling into input EMI filters and allows smaller Y-capacitor values while maintaining EN55022 compliance in 100–200 kHz CCM PFC stages.

Can STTH3006D replace STTH3006W in the same PCB footprint?

No - STTH3006W uses the DO-247 package (Rth(j-c) = 1.1 °C/W, no insulation), while STTH3006D uses DOP3I (Rth(j-c) = 1.7 °C/W, 2500 VRMS isolation). The terminal pitch, mounting hole position, and tab geometry differ. Mechanical redesign and thermal revalidation are required for substitution.

What is the impact of junction temperature on reverse recovery time?

trr increases with junction temperature: at 125 °C, typical trr rises to ~65 ns (vs. 50 ns at 25 °C) under identical test conditions (IF = 0.5 A, dIF/dt = −50 A/µs). This must be factored into loss calculations for high-ambient designs, as elevated trr raises switching loss proportionally - especially critical in forced-air-cooled server PSUs operating near 175 °C Tj limit.