STMicroelectronics STTH60W03CW

Overview

STTH60W03CW from STMicroelectronics is a dual common-cathode ultrafast recovery rectifier in TO-247 package, rated for 300 V repetitive peak reverse voltage and 60 A total average forward current (30 A per diode at Tc = 95 °C). It delivers 0.94 V typical forward voltage at 150 °C and 30 A, with 25 ns typical reverse recovery time and 180 nC reverse recovery charge - optimized for secondary-side rectification in high-frequency welding inverters.

For engineers reviewing the STTH60W03CW datasheet, STTH60W03CW pinout, STTH60W03CW application, or STTH60W03CW equivalent, key selection criteria include thermal resistance (0.9 °C/W junction-to-case total), softness factor (0.3), surge current capability (280 A), and ECOPACK®2 compliance for industrial power conversion designs.

Technical Context

This dual-diode rectifier integrates two independent 300 V/30 A ultrafast switching elements sharing a common cathode terminal, enabling synchronous or interleaved operation in full-wave bridge or center-tapped topologies. Its low QRR (180 nC) and soft recovery (Sfactor = 0.3) minimize EMI and voltage overshoot during turn-off in hard-switched DC/DC converters.

The device uses ST's proprietary 300 V silicon technology with optimized carrier lifetime control, achieving balanced trade-offs between conduction loss (VF = 0.94 V @ 150 °C) and switching speed (trr = 25 ns @ 25 °C). Thermal design leverages a low Rth(j-c) of 0.9 °C/W (total) to sustain 60 A average current at Tc = 95 °C without forced cooling.

Key Specifications

Pinout & Package

Housed in industry-standard TO-247 package with three terminals: two anodes (A1, A2) and one common cathode (K). Mounting hole centered on package base supports mechanical stability under vibration in portable welding equipment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR6030CT and VS-60CPH03, STTH60W03CW provides superior thermal efficiency (0.9 °C/W), faster recovery (25 ns), and documented softness (0.3), making it the preferred choice for compact, high-frequency welding inverters requiring low EMI and minimal thermal overhead.

Availability

STTH60W03CW is available at Aetrix Electronics and suitable for MIG welding inverters, TIG power supplies, MMA welder DC links, and industrial DC/DC converters requiring stable component supply with long-term industrial lifecycle support.

Supply support for STTH60W03CW 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STTH series targets high-efficiency power conversion in demanding industrial environments, with STTH60W03CW specifically engineered for ultrafast, low-loss rectification in welding and high-power DC/DC applications.

FAQ

What is the maximum junction temperature and how does it affect continuous current rating?

The STTH60W03CW has a maximum operating junction temperature of 175 °C. At Tc = 95 °C, its 60 A total average forward current rating assumes both diodes share thermal load equally. Exceeding 175 °C risks permanent degradation of the silicon die and bond wires; derating is required above 95 °C case temperature per Figure 1 in the datasheet.

Can STTH60W03CW be used in single-diode configurations?

Yes - each anode (A1 or A2) forms an independent 300 V/30 A ultrafast diode with the common cathode (K). Either diode can be used alone, with the unused anode left unconnected. Thermal performance remains valid only if power dissipation is limited to 30 A per diode and heatsink interface is maintained across the full TO-247 base.

Is the TO-247 package lead-free and RoHS compliant?

Yes - STTH60W03CW is manufactured in an ECOPACK®2-compliant TO-247 package, which meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The epoxy molding compound satisfies UL94 V0 flammability rating, and all metallization layers are lead-free.

How does the softness factor impact system-level EMI performance?

A softness factor of 0.3 indicates controlled, non-oscillatory reverse recovery with minimal current tail. This reduces high-frequency spectral content in switching node waveforms, lowering conducted and radiated emissions by up to 12 dB in 30–100 MHz bands - easing compliance with CISPR 11 Class A industrial EMI limits without additional filtering.