STMicroelectronics STTH3006PI

Overview

STTH3006PI from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode in insulated DOP3I package, rated for 600 V repetitive peak reverse voltage, 30 A average forward current at TC = 85 °C, and 50 ns maximum reverse recovery time. It serves as a boost diode in continuous-conduction-mode PFC circuits and as a freewheeling diode in hard-switching SMPS.

For engineers reviewing the STTH3006PI datasheet, STTH3006PI pinout, STTH3006PI application, or STTH3006PI equivalent, key selection criteria include reverse recovery time under dIF/dt stress, thermal resistance (1.7 °C/W junction-to-case), softness factor, conduction loss equation (P = 1.07 × IF(AV) + 0.011 × IF²(RMS)), and insulated package safety rating (2500 VRMS).

Technical Context

This device implements ST's Turbo 2 600 V technology to achieve low trr (50 ns max) with soft recovery characteristics-critical for minimizing EMI and voltage overshoot in high-frequency PFC stages. Its low VF (1.10 V typ. at 150 °C, 30 A) and low IR (800 µA max at 150 °C, VR = VRRM) reduce both conduction and leakage losses.

The DOP3I package provides 2500 VRMS insulation between case and die, enabling direct mounting on heatsinks without isolation hardware. Thermal performance is characterized by Rth(j-c) = 1.7 °C/W, supporting high-power operation up to Tj = 175 °C with appropriate heatsinking.

Key Specifications

Pinout & Package

The STTH3006PI uses the insulated DOP3I package: a molded plastic case with electrically isolated metal baseplate rated for 2500 VRMS insulation. Mounting torque must be 0.9–1.2 N·m; maximum allowable torque is 1.0 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH30L06D, STTH3006PI trades 0.6 °C/W higher thermal resistance for integrated 2500 VRMS insulation-reducing BOM count and assembly steps. Versus MUR3060CT, it delivers lower trr and VF at elevated temperature, making it preferable for thermally constrained, high-frequency PFC designs.

Availability

STTH3006PI is available at Aetrix Electronics and suitable for continuous-conduction-mode PFC modules, industrial SMPS freewheeling paths, and high-voltage flyback output rectification requiring stable component supply and long-term manufacturability.

Supply support for STTH3006PI 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 industrial, automotive, and consumer markets.

The STTH series belongs to ST's high-voltage rectifier product line, engineered specifically for efficiency-critical power conversion stages including PFC, resonant converters, and HVDC outputs-emphasizing speed, softness, and thermal robustness.

FAQ

What is the maximum recommended mounting torque for the STTH3006PI DOP3I package?

The recommended torque range for mounting STTH3006PI in the DOP3I package is 0.9 to 1.2 N·m. Exceeding the maximum allowable torque of 1.0 N·m risks mechanical damage to the molded case or internal bond wires, potentially compromising insulation integrity or thermal contact. Always use a calibrated torque screwdriver and verify flatness of the heatsink surface prior to installation.

Does STTH3006PI support operation at junction temperatures above 150 °C?

Yes-STTH3006PI is fully specified for continuous operation up to Tj = 175 °C, with all key parameters (including VF, trr, and IR) guaranteed across this full range. The 175 °C rating enables reliable use in high-ambient environments such as enclosed industrial power supplies or motor drive cabinets without forced air cooling.

How does the softness factor impact EMI in PFC applications?

A softness factor ≤0.6 means the diode's reverse recovery current decays gradually rather than abruptly, reducing high-frequency spectral content in the switching node. This directly lowers conducted and radiated EMI, easing compliance with EN 55022 Class B and reducing filter component size and cost in PFC front-ends operating above 100 kHz.

Can STTH3006PI replace STTH3006W in the same PCB footprint?

No-STTH3006PI (DOP3I) and STTH3006W (DO-247) have incompatible mechanical outlines and terminal configurations. DOP3I uses an insulated tab with axial cathode lead, while DO-247 has a non-insulated tab and different mounting hole pattern. Board redesign and thermal validation are required for substitution; they are functionally equivalent but not mechanically interchangeable.