277V Thermistor for LED Lighting, PFC, and Power Supplies

April 13, 2015 By admin Comments are Off

Ametherm, Inc. today released a new UL-approved circuit protection thermistor that is thought to be the industry’s first to offer a 277V rating optimized for applications including LED lighting and ballasts, power factor correction (PFC) circuits, and inrush current control in uninterruptible power supplies (UPS) with ratings under 500W. Ametherm’s new SL10 10003 thermistor claims the highest energy, continuous current, and ambient temperature ratings for any device in its size and class. The device handles steady state current up to 3A with a maximum received energy rating of 17J.

The device features a dissipation constant of 11mW / degree C and can handle a body temperature of 151 degrees C at 100% of its maximum current rating. Maximum capacitance at the device’s 277V voltage rating is 200μF. The SL10 10003 provides a more compact alternative to larger NTC devices or the more expensive combination of a power resistor, relay and timer or implementation of the same functionality with active circuits.

“The SL10 10003 thermistor is the simplest and most cost-effective way to limit inrush current in LED driver and ballast circuits, as well as in PFC circuits,” said Eric Rauch, president and CEO at Ametherm. “It’s a unique made-in-USA, UL-approved way for designers to get the 277V headroom they need for more reliable LED lighting circuitry and for power supplies with ratings under 500W.”

The SL10 10003 thermistor is available direct or through distributors such as Mouser, Digi-Key, Newark element14, and Farnell. Samples and production quantities of the SL10 10003 are available now, with factory lead times of four to five weeks. Volume pricing for U.S. delivery starts at $0.20 per piece.

source: http://www.powerpulse.net/story.php?storyID=31976

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