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Microsemi ships Solar Bypass Device with CoolRUN technology
by Staff Writers
Aliso Viejo CA (SPX) Oct 08, 2015

File image.

Microsemi Corporation (has announced the availability of the LX2410A IDEAL solar bypass device with Microsemi's patented CoolRUN technology, designed to provide a bypass path in photovoltaic (PV) module applications. The LX2410A, a member of Microsemi's award-winning solar bypass family, reduces the cost and increases the reliability of photovoltaic solar modules by replacing the Schottky diodes in junction boxes with an under the glass, higher performance solution.

"Our new LX2410A IDEAL solar bypass devices provide unique advantages over competing products, including thinner packaging and better lightning strike protection capabilities," said Shafy Eltoukhy, vice president and business unit manager at Microsemi.

High current PV module applications require a bypass path as a protection mechanism to enable the array to produce power when one part of the array may be shaded or damaged. In addition the device is required to protect the array from lightning strikes. Microsemi's LX2410A is the industry's only bi-directional surge protection device designed to handle up to 500 amperes (amps) of surge protection in the forward and reverse direction, maximizing lifetime robustness and reliability of the device.

The thin package of the LX2410A with 0.7 millimeters (mm) maximum thickness is designed for mounting inside solar PV panels to shrink the junction box and reduce expensive copper wiring to and from the box. This minimizes system expense and enables higher power PV modules with smaller junction boxes and less copper losses for higher efficiency. The pads of the package are 2.6 mm apart to meet the IEC61730-1 and IEC61730-2 creepage and clearance requirements.

REC, the largest European brand of solar panels, has evaluated active bypass devices like the LX2410A in its next generation solar panels. According to the company's engineering team, the thin package and high efficiency of the LX2410A allow them to be installed under the front glass of REC's solar panels, reducing system costs by eliminating the need for a large junction box and excessive connection wires. REC has produced more than 15 million panels and is a PV technology leader with integrated manufacturing of polysilicon wafers, cells, panels and systems.

Unlike a Schottky diode, the LX2410A is an active device that has an extremely low voltage drop and reverse leakage current, resulting in increased PV module power output, negligible heat generation and temperature rise during operation. Its patented CoolRUN technology's non-hiccup control eliminates electromagnetic interference (EMI) radiating from PV module strings.

"Active bypass devices will replace Schottky diodes for improved efficiency and robustness in the next generation PV module designs," said Dr. Heribert Schmidt of the Fraunhofer-Institute ISE, Germany, a leading research institute for solar energy systems. "The devices also optimize module construction for lower overall system cost."

According to market research firm IHS, 57 gigawatts (GW) of PV power capacity is forecasted to be installed in 2015 worldwide, reflecting a 48 percent market growth since 2013. With each solar panel estimated at 250 watts (W) and using three bypass devices, the total addressable market (TAM) for these products is forecasted to be greater than 600 million devices in 2015.

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