SMA Surge Protection Device, DC Type 2 (9 Pieces/Box)

The SMA DC_SPD_KIT4-10 Surge Protection Device (SMA-5018) is a pluggable DC surge protector supplied 9 pieces per box, designed to protect solar string combiner boxes and inverters. Rated for a maximum continuous operating voltage of 1100 VDC, it uses high energy MOV protective elements with a total discharge current of 50 kA (8/20 µs) and a nominal discharge current of 20 kA. Its DIN rail pluggable design and thermal protection make it a reliable choice for photovoltaic installations.

Key Features:

• Type 2 / Type 1CA DC surge protection
• Maximum continuous operating voltage 1100 VDC
• Total discharge current 50 kA (8/20 µs)
• Nominal discharge current 20 kA (8/20 µs)
• Voltage protection level 4400 V, response < 25 ns
• High energy MOV with thermal protection
• DIN rail pluggable, IP20, UL 94 V-0 housing
• Operating temperature -40°F to 185°F
• EN 50539-11:2013+A1:2014, UL 1449 4th edition
• Green Flag operating state, optional remote contacts

Ideal for photovoltaic string boxes and inverter inputs, this pluggable device suits installers building combiner boxes for residential and commercial solar arrays. It mounts on standard DIN rail, accepts up to 35 mm² conductors, and offers optional remote contacts for fault monitoring in demanding Canadian climates. Order the DC_SPD_KIT4-10 (also listed as DC_SPD_KIT410) from Circuit Solar, in stock in Canada and shipped from Red Deer, AB.