RS Components
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Entrelec M 4/9 PV Series 130 V dc Maximum Voltage Rating 2.5kA Maximum Surge Current Terminal Block with Transient

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Surge Protected Terminal Block

Grey nylon polyamide 6.6 moulding
Captive terminal screws with hardened heads
Compact 9mm spacing size
Deep Top Hat or G type rail mounting
Location category Zone 2
Dimensions 65.5 x 67mm

Surge Protection Devices, SPDs (DIN-rail)

Voltage surges, often referred to as spikes or transients are typically caused by switching of fluorescent lights, fuses blowing or nearby lightning activity. The worst voltage surges are usually caused by lightning and can reach up to 6000V, with current surges of over 3000A. The maximum size of the voltage and current surges depends on the location within the building's wiring system. BS7671: 2011 Amendment 1 Sections 443 and 534 cover risk assessment and provides guidance on protection of electronic equipment for installation engineers to follow. The fullest information on lightning and surge protection comes from the BSEN 62305 series of standards.

Suppressor TypeTerminal Block with Transient Voltage Suppressor
Maximum Voltage Rating130 V dc
Mounting TypeDIN Rail
Maximum Surge Current2.5kA
SeriesM 4/9 PV
Minimum Operating Temperature-55°C
Maximum Operating Temperature+130°C