STMicroelectronics STTH6003CW

Overview

STTH6003CW from STMicroelectronics is a dual ultrafast soft-recovery silicon rectifier diode in TO-247 package, rated for 300 V repetitive peak reverse voltage, 30 A average forward current per diode (60 A total device), and 55 ns maximum reverse recovery time. It serves as a secondary-side rectifier in high-frequency switch-mode power supplies and telecom DC–DC converters where low noise, low conduction loss, and thermal robustness are critical.

For engineers reviewing the STTH6003CW datasheet, STTH6003CW pinout, STTH6003CW application, or STTH6003CW equivalent, key selection criteria include verified soft recovery behavior (Sfactor ≥ 0.3), junction-to-case thermal resistance of 1 °C/W per diode, and validated performance under dIF/dt up to 500 A/µs at 125 °C junction temperature.

Technical Context

This dual common-cathode rectifier integrates two independent ultrafast diodes sharing a thermally optimized TO-247 metal tab. Its soft reverse recovery (Sfactor ≥ 0.3) minimizes EMI during turn-off, while low VF (max 1.25 V @ 30 A, 25 °C) and low trr (typ. 40 ns) reduce switching and conduction losses simultaneously.

The device operates with a maximum junction temperature of +175 °C and supports surge currents up to 300 A (10 ms sine). Thermal coupling between diodes is characterized via Rth(c) = 0.1 °C/W, enabling accurate junction temperature estimation when both diodes conduct concurrently.

Key Specifications

Pinout & Package

Packaged in TO-247 with isolated metal tab (case), the STTH6003CW features three terminals: two anodes (A1, A2) and one shared cathode (K). The case is electrically isolated and thermally conductive, intended for mounting to a heatsink using 0.55 N·m torque.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast dual rectifier applications.

Compared with MUR6030CT and VS-60CPH03, STTH6003CW uniquely delivers verified soft recovery (Sfactor ≥ 0.3), integrated dual-common-cathode layout, and lower VF-enabling simpler, quieter, and more space-efficient high-frequency rectification without design compromises.

Availability

STTH6003CW is available at Aetrix Electronics and suitable for telecom power supplies, welding equipment, low-voltage high-frequency inverters, and industrial SMPS requiring stable component supply and long-term manufacturability.

Supply support for STTH6003CW 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.

The STTH series targets high-efficiency, high-reliability power conversion with emphasis on ultrafast recovery, soft switching, and thermal resilience-specifically engineered for next-generation telecom, welding, and industrial SMPS.

FAQ

What is the maximum junction temperature and how is it maintained?

The STTH6003CW has a maximum operating junction temperature of +175 °C. This rating is maintained through its low Rth(j-c) of 1 °C/W per diode and electrically isolated TO-247 metal tab, which enables efficient conduction cooling to an external heatsink. Thermal derating curves in the datasheet define safe operating area versus case temperature and duty cycle.

Is the TO-247 package electrically isolated?

Yes-the TO-247 package used for STTH6003CW features an electrically isolated metal tab. The case is not internally connected to any terminal, allowing direct mounting to a grounded heatsink without insulation hardware in most applications, provided voltage isolation requirements are met per system safety standards.

How does the soft recovery characteristic reduce EMI?

The soft recovery (Sfactor ≥ 0.3) limits the rate of change of reverse current (diR/dt) during turn-off, preventing abrupt current collapse and associated high-frequency ringing. This directly reduces broadband radiated emissions and eliminates the need for RC snubbers in many high-frequency SMPS layouts, simplifying filtering and improving power density.

Can STTH6003CW replace Schottky diodes in 100 kHz+ designs?

Yes-its 55 ns trr and low VF (1.25 V max) make it viable for >100 kHz operation where Schottkys face thermal limitations above 150 °C. Unlike Schottkys, it maintains stable leakage (<600 µA @ 125 °C) and reverse blocking at elevated temperatures, offering superior reliability in high-ambient industrial environments.