Contactor handles currents as high as 4000A

17th August 2015

Siobhan O'Gorman

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TE Connectivity has released the KILOVAC KHR500 (Bubba II) high-voltage, high-rupture, 600 AMP contactor, which is smaller, lighter, and switches significantly higher power than its predecessor, the EV500 (Bubba I). Capable of handling inrush currents as high as 4000A, the device is hermetically sealed for use in harsh and explosive environments.

Configured as a single-pole, single-throw device, the KHR500 can handle voltages from 28 to 1000VDC and continuous 600A currents. Because it is not polarity sensitive, the contactor allows bidirectional load switching. An integrated coil economiser reduces the power required to hold the contacts closed to 320mA at 24VDC. The device’s single-pole, double-throw auxiliary switch supports 3A at 125VRMS or 1A at 30VDC, and low-level signals down to 5V/10mA.

The KHR500 contactor has an integrated dual-coil electronic ‘cut throat’ economiser. This withstands 100,000 cycles and operates from -40 to +125°C. With a rugged and robust design, the contactor is suitable for ground vehicle, marine, solar, automotive and energy storage applications.

“TE has always been focused on advancing SWaP technology to help lower cost, reduce weight and size, and improve power handling capabilities,” said Earle Alldredge, Product Manager, Global Aerospace, Defense & Marine, TE. “The KHR500 high-voltage contactors are smaller and 64% lighter than our popular EV500 BUBBA contactors, providing more savings and flexibility to our customers.”