STMicroelectronics STTH6004W

Overview

STTH6004W from STMicroelectronics is a 400 V, 60 A ultrafast high-voltage rectifier diode in DO-247 package, optimized for output stage rectification in high-frequency switching power supplies. It delivers typ. 0.83 V forward voltage at 60 A and 150 °C, 50 ns max reverse recovery time at 200 V/100 A/µs, and 175 °C max junction temperature - enabling efficient operation in telecom server PSUs and UPS systems.

For engineers reviewing the STTH6004W datasheet, STTH6004W pinout, STTH6004W application, or STTH6004W equivalent, key selection criteria include conduction loss modeling (P = 0.8×IF(AV) + 0.0033×IF²(RMS)), thermal resistance (Rth(j-c) = 0.7 °C/W), softness factor (≥0.4), and ECOPACK2 compliance for industrial-grade reliability.

Technical Context

This ultrafast rectifier employs ST's proprietary 400 V silicon technology with optimized carrier lifetime control to achieve low trr (≤50 ns) and soft reverse recovery (Sfactor ≥0.4), minimizing EMI and voltage overshoot during hard-switching transitions. Its low VF (0.83 V typ. @ 60 A, 150 °C) and high IF(AV) rating directly reduce conduction losses in high-current DC-DC output stages.

The DO-247 package provides low thermal resistance (0.7 °C/W j-c) via direct metal-to-heatsink conduction, supporting continuous operation at TC = 125 °C with 60 A average current. Reverse leakage remains ≤1000 µA at 150 °C and full 400 V blocking, ensuring stable performance under elevated ambient conditions.

Key Specifications

Pinout & Package

STTH6004W uses the DO-247 through-hole package with two terminals: anode (K) and cathode (A), mounted via screw-down mechanical fixation (recommended torque: 0.8 N·m). The case serves as the cathode terminal, enabling low-inductance, high-current conduction path and direct thermal coupling to heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR6040CT and VS-60EWH04, STTH6004W offers the lowest VF (0.83 V) at operating temperature and tightest trr (50 ns max), delivering superior conduction + switching loss balance in high-frequency, high-reliability industrial and telecom power systems.

Availability

STTH6004W is available at Aetrix Electronics and suitable for UPS power supply, telecom server power equipment, and datacenter rack PDU applications requiring stable component supply, long-term industrial lifecycle support, and ECOPACK2-compliant sourcing.

Supply support for STTH6004W 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, power, microcontroller, and sensor solutions for industrial, automotive, and communications markets.

STTH6004W belongs to ST's high-voltage ultrafast rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in switched-mode power supplies operating above 50 kHz.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STTH6004W supports continuous operation at TC = 125 °C with its rated 60 A IF(AV), as specified in the Absolute Ratings table. Derating is required above this temperature, and the device's 175 °C maximum junction temperature allows short-term overload tolerance when thermal design maintains Tj ≤ 175 °C.

Is STTH6004W suitable for synchronous rectification topologies?

No - STTH6004W is a unidirectional, non-controlled ultrafast diode and cannot replace MOSFETs in synchronous rectification. It is designed for standard diode rectification or freewheeling roles where controlled turn-on/turn-off is not required.

How does the DO-247 package improve thermal performance over TO-247?

The DO-247 package features a larger metal base and optimized internal bond structure, achieving 0.7 °C/W Rth(j-c) - ~15% lower than typical TO-247 rectifiers. Its screw-mount design ensures consistent thermal interface pressure, reducing contact resistance versus clip- or solder-mounted alternatives.

Does STTH6004W require a snubber circuit in 100 kHz SMPS designs?

A snubber is not mandatory due to its soft recovery (Sfactor ≥0.4) and low trr (≤50 ns), but may be recommended in high-dI/dt, high-inductance layouts to further suppress voltage ringing. Layout optimization and proper gate drive of upstream switches typically reduce snubber dependency.