The SD series of surge protector units from Eaton has an ultra-slim design for protecting electrical equipment against surges on control loop cabling. The SD surge protection devices use a hybrid protection circuit, combining sold state electronics and a gas-filled discharge tube (GDT). This combination is designed for exceptionally low line resistance and adds only a small voltage drop to the system whilst providing surge protection up to 20kA.

• Protection for 4-20mA loops
• Multi-stage hybrid protection circuit up to 20kA maximum surge current
• Range of voltage ratings to suit all process I/O applications
• Designed for high bandwidth or low resistance applications
• Auto reset
• Optional loop disconnect
• ATEX Certified

Looking for a way to protect electrical equipment on control-loop cabling? Install this surge protection device from Eaton's MTL range. It diverts voltage spikes through a multi-stage hybrid protection circuit, combining solid-state electronics and a GDT (gas-filled discharge tube). This provides low-line resistance and surge protection of up to 20kA (kiloamperes). The device has an operating temperature range of -40°C to +80°C, so it's suitable for use in harsh conditions. You can use it to safeguard equipment in your computerised networks.

• Bright yellow colour for easy identification
• Provides protection for 4 to 20mA (milliampere) loops for flexible use
• Ultra-slim (7mm wide) for use in narrow spaces
• DIN rail mounting capability for quick and convenient installation

No. This surge protection device features an optional loop disconnect, which means you don't have to remove it when carrying out maintenance or repairs on your systems.

Yes. This surge suppressor is suitable for use in potentially explosive atmospheres.

Eaton formerly known as MTL

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 spikes are usually caused by lightning strikes and can reach up to 6000V, with current surges of over 3000A. The maximum size of the let-through voltage and current inrush 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.