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Darrah is an essential supplier and manufacturer

During this time, essential businesses are permitted to stay open. Darrah Electric Company is an essential supplier and critical manufacturer as defined by the U.S. Department of Homeland Security CISA memo dated March 19, 2020. As a business that supports the manufacturing of critical infrastructure; i.e., transportation systems, control systems, power supplies, information technology, communications, financial sectors, chemical production, defense industrial base, and energy in the US, our products support the safe and efficient flow of goods and services essential to slow down the COVID-19 pandemic. Therefore, we remain open for business.

Published on 03/24/20 Read Article
LEM HMSR SERIES Miniature current sensor.

LEM has expanded its range of miniature, integrated circuit sensors range for AC and DC isolated-current measurement with the introduction of the HMSR series. Despite their small size, the components can handle overload current bursts of up to 20 kA (8-20 us surge test profile), such as those that occur in photovoltaics applications while still providing a reinforced isolation. Products in the series are designed to measure currents of up to 2.5 times their nominal ratings of 6 A, 8 A, 10 A, 15 A, 20 A or 30 A.

Published on 03/19/20 Read Article
ABB Fast recovery diodes

Diodes can be subdivided into two main classes: Rectifier diodes (standard recovery) and fast diodes. Rectifier diodes are generally used for conversion of AC (alternating current) to DC (direct current). While optimized for low conduction losses, Rectifier diodes withstand only moderate dynamic stress in transition from conducting to the blocking state.

Published on 01/21/20 Read Article
LEM ARU Series

LEM's new Unique, IP68, ruggedized outdoor flexible split-core AC current sensor implementing high accuracy Rogowski Coil technology.

Published on 01/08/20 Read Article
Ethics and Business Conduct

Ethics programs aim to prevent and detect criminal conduct, reinforcing compliance with legal requirements. They also foster an organizational culture in which employees feel empowered to ‘do the right thing,’ even when laws and regulations don’t provide clear guidance.

Published on 12/23/19 Read Article
Mitsubishi Electric's Diode Modules

Mitsubishi Electric offers general rectifying diode modules that rectify commercial frequencies and high frequency diode modules for freewheel diodes in inverter circuits and for high-speed switching on a surge voltage absorbing circuit (snubber). The main switching devices of an inverter have changed from bipolar transistors to high-speed MOS gate devices, such as IGBT. The requirements of radio noise regulations have also increased the importance of not just reverse recovery characteristics, but also software recovery characteristics.

Published on 12/12/19 Read Article
Wakefield-Vette Standard part catalog

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

Published on 12/03/19 Read Article
Dynex Pulse Power Thyristors

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.

Published on 11/26/19 Read Article
ABB IGBT and diode modules with SPT and SPT+ chips

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.

Published on 11/13/19 Read Article
Mitsubishi Electric’s Intelligent Power Modules

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).

Published on 11/06/19 Read Article