STMicroelectronics STTH100W06CW

Overview

STTH100W06CW from STMicroelectronics is a dual-die ultrafast high-voltage rectifier diode in TO-247 package, rated for 600 V repetitive peak reverse voltage and 2 × 50 A average forward current per diode at Tc = 135 °C. It features 55 ns typical reverse recovery time, 0.92 V typical forward voltage at 150 °C/50 A, and low thermal resistance (0.55 °C/W junction-to-case per diode), optimized for secondary-stage DC/DC and DC/AC converters in MIG/MMA/TIG welding machines.

For engineers reviewing the STTH100W06CW datasheet, STTH100W06CW pinout, STTH100W06CW application, or STTH100W06CW equivalent, key selection criteria include ultrafast switching performance (trr = 55 ns typ), soft recovery behavior (Sfactor = 0.3), low conduction loss (VF = 0.92 V @ 150 °C), and robust thermal design (Rth(j-c) = 0.55 °C/W per diode) in high-power industrial converter topologies.

Technical Context

The STTH100W06CW integrates two independent 600 V, 50 A ultrafast rectifiers in a single TO-247 package with ribbon bonding for enhanced mechanical robustness. Its Turbo 2 silicon technology delivers low reverse recovery charge (QRR = 3700 nC) and controlled softness (Sfactor = 0.3), minimizing voltage overshoot and EMI during hard-switching transitions in high-frequency welder inverters.

Thermal management is enabled by low junction-to-case resistance (0.55 °C/W per diode) and coupling resistance (0.15 °C/W), allowing parallel operation of both dies while maintaining Tj ≤ 175 °C under 100 A total device current at Tc = 120 °C. The device operates across -65 to +175 °C storage and junction temperature ranges.

Key Specifications

Pinout & Package

Housed in ST's standard TO-247 package with three terminals: two anodes (A1, A2) and one shared cathode (K). The package uses ribbon bonding for improved bond wire reliability under thermal cycling and mechanical vibration common in industrial welding equipment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR100E60 and VS-100CTH06, the STTH100W06CW offers superior thermal partitioning (dual-die Rth(j-c) = 0.55 °C/W each), tighter trr control (55 ns), and lower VF at elevated temperature-making it optimal for thermally dense, high-frequency welder rectifier designs demanding long-term reliability.

Availability

STTH100W06CW is available at Aetrix Electronics and suitable for MIG/MMA/TIG welding machines, industrial DC/DC converters, and renewable energy grid-tie inverters requiring stable component supply, high-temperature operation, and repeatable ultrafast recovery performance.

Supply support for STTH100W06CW 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, analog ICs, and sensors for industrial, automotive, and consumer markets.

The STTH100W06CW belongs to ST's Turbo 2 ultrafast diode product line, engineered specifically for high-efficiency, high-reliability rectification in industrial power conversion systems operating above 20 kHz with stringent thermal and EMI constraints.

FAQ

What is the maximum junction temperature and how does it affect thermal design?

The STTH100W06CW has a maximum junction temperature of 175 °C. This allows operation at elevated ambient temperatures typical in enclosed welding cabinets. With Rth(j-c) = 0.55 °C/W per diode, a 25 W dissipation per die results in only a 13.75 °C rise above case temperature-enabling compact heatsink designs when case temperature is maintained below 160 °C.

Can both diodes be operated simultaneously, and how is power dissipation calculated?

Yes, both diodes can operate simultaneously. Total conduction loss is calculated using P = 0.85 × IF(AV) + 0.006 × IF²(RMS) per diode. At 50 A average and 75 A RMS per diode, conduction loss is ~46 W per die. Thermal coupling (Rth(c) = 0.15 °C/W) must be included when estimating total junction temperature rise under shared heatsinking.

Is the STTH100W06CW suitable for use in automotive applications?

No-the STTH100W06CW is not qualified as automotive-grade per AEC-Q101. It is specified for industrial applications only, with storage and operating temperature ranges aligned to industrial (−65 to +175 °C), not automotive (−40 to +150 °C junction) requirements. ST does not warrant its use in safety-critical or vehicle-mounted systems.

How does the softness factor impact EMI in welding inverters?

A softness factor of 0.3 indicates highly controlled, non-oscillatory reverse recovery-critical in welding inverters where rapid diode turn-off can excite parasitic LC resonances in transformer windings and output cabling. This reduces broadband RFI emissions by limiting di/dt-induced voltage spikes, easing EMC filter design and improving arc ignition consistency.