Solar Power World

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A manufacturer of electronic components has produced one of the smallest junction boxes in the photovoltaic industry. The Solarlok slim junction box by Tyco Electronics distributes dc power to a solar panel in a compact design that limits visibility on the back of a panel.

The TUV-approved product offers a 20-year life. Targeted applications include two-rail crystalline PV modules and two-rail thin-film PV modules, with a 12-A current rating for crystalline applications and a 3-A current rating for thin-film applications.

The junction box measures 15.5 mm by 52 mm.

The junction box reduces purchasing costs by offering a total assembly that includes solar-rated cables available in various lengths to suit a variety of applications. Also included are IP67-rated connectors that click indicating a proper installation. They also include a locking latch that meets code requirements.

The junction-box assembly includes a spring clamp for terminating foil leads, which clamps to the contact rail inside the box for increased reliability and ease of termination. This feature also eliminates the need for soldering. Diodes are offered in multiple current ratings, ranging from 3 to 12 A.

The Solarlok slim junction box does not require potting, eliminating the cost and mess of using potting material to seal the inside of a box from moisture. In addition, the housing lid uses two latches to secure attachment to the lower part of the box.

Tyco Electronics www.te.com/solar