Wakefield-Vette Standard part catalog Thousands of standard board level heat sinks & most commonly tooled thermal extrusions - Liquid Cooling and Systems - Electronic Packaging Systems - Thermal Interface Materials - Numerous Design Guidelines

Dynex Semiconductor produces a small range of thyristors for very fast turn-on based on its GTO structures. To support our customers, we design and produce the complete switch assemblies, including semiconductor devices, driving units, clamping, cooling, and testing.

ABB’s IGBT power modules are available from 1700 to 6500 volt as single IGBT, dual / phase-leg IGBT, chopper and dual diode modules. The high-power HiPak IGBT modules feature low losses combined with soft-switching performance and record-breaking Safe Operating Area (SOA). The newly introduced 62Pak fast switching medium-power IGBT modules feature lowest switching losses, full 175 °C operation with full square SOA and standard package allowing drop-in replacement.

IPM's (Intelligent Power Modules) are high-performance module that mounts a dedicated drive circuit for drawing greater performance from an IGBT chip, and it provides a custom IC for executing self-protection functions (short circuit, supply under voltage, and over temperature).

Gate Drivers are designed for triggering large Gate-Turn-Off Thyristors (GTO) featuring gate-turn-off currents up to 3000 Amps and off-state voltages up to 4500 volts. The control signal, transmitted via fiber optics, controls the output valve of the gate driver. A feedback signal, also transmitted via fiber optics, is used to check that the gate driver and GTO are operating properly. This GTO Gate Driver was developed for use in traction systems and is currently being used successfully by numerous customers.

Air and Water Cooled Power Assemblies- AC Controller, Diode and Thyristor Bridges, 4 Quadrant Bridges Darrah manufactures a complete range of heatsink assemblies designed to integrate into you new or existing power systems. Available as AC Controllers, Diode and Thyristor Bridges. Darrah assemblies mount easily within your cabinet and integrate with various control systems.

The Powerex IGBT/HVIGBT line-up of Powerex self-manufactured devices employ CSTBT (Carrier Stored Trench-Gate Bipolar Transistor) technology, supporting the reduced power loss and miniaturization required for industrial applications. Powerex HVIGBTs and HV diodes, feature highly insulating housings that offer enhanced protection by means of greater creepage and strike clearance distance for many demanding applications like medium voltage drives and auxiliary traction applications.

Liquid cooling is just like forced convection in that fluid is forced through the system by an external source like a pump. While most applications use water or water/glycol mixtures as the primary fluids, any liquid can be used, including liquid refrigerants, fluorocarbons, gasoline, hydraulic fluid, or oil to name a few. Liquids are more efficient then forced air because the specific heat of liquid is higher than the specific heat of air and just like forced air cooling, liquid cooling is most efficient if the fluid is turbulent. However, turbulent flow puts a strain on the pump.

Darrah manufactures a complete range of isolated module heat sink assemblies designed to integrate into your new or existing power systems. Available as AC Controllers, Diode and Thyristor Bridges. Darrah assemblies mount easily within your cabinet and integrate with various control systems.

The Dynex Phase Control Thyristor is used in DC drives, Static Transfer Switches, Frequency Converters, Line Commutated HVDC Converters, Controlled Rectifiers, Static VAR compensators, in fact, any application requiring energy efficiency, switching at line frequencies and not requiring the switch to have turn-off capabilities. Dynex Semiconductor’s phase control thyristors are produced in both Lincoln, England and Zhuzhou, China. Development continues to produce designs with lower losses, higher blocking voltages, higher current capability and devices tailored for particular application