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Solar bypass device improves cost, reliability of PV modules

Solar bypass device improves cost, reliability of PV modules

By eeNews Europe



The LX2410A IDEAL solar bypass device is designed to provide a bypass path in photovoltaic (PV) module applications. It is claimed to reduce the cost and increase the reliability of photovoltaic solar modules by replacing the Schottky diodes in junction boxes with an under-the-glass, higher-performance solution.

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. The LX2410A is offered as the only bi-directional surge protection device designed to handle up to 500 A 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-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.

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 radiating from PV module strings.

Additional features of the LX2410A include:

• 12.5 A is supported for International Electrotechnical Commission (IEC) testing
• Low forward voltage drop: VF=95 mV @ IF=10 A, Tcase=110°C
• Low reverse leakage current: IR=12.5 µA @ VR=33 V, Tj=125°C
• 500 A of bi-directional lightning survivability per IEC 61000-4-5, part 6.1
• Operating junction temperature range of -55°C to 125°C
• Reverse voltage up to 33 V
• Superior electrostatic discharge (ESD) performance

LX2410A IDEAL Solar Bypass device information page

Microsemi: www.microsemi.com

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