The Schneider Electric Square D TVS4EMA12SISWT1 is a Type 1 Surge Protective Device (SPD) engineered for robust protection in 480Y/277V electrical systems. This device is part of the EMA series, designed to safeguard sensitive equipment from transient overvoltages and lightning-induced surges. Its construction incorporates a surge current rating of 120kA, ensuring significant capacity to absorb and dissipate high-energy events.

Technical details

• Series: EMA
• Type: Type 1 Surge Protective Device (SPD)
• Voltage Rating: 480Y/277V AC
• Maximum Surge Current: 120 kA
• Configuration: 3-Phase, 4-Wire (3P4W)
• Internal Shunt (SIS): Yes
• Switching Functionality: Integrated Switch (SWT)
• Protection Mode: Line-to-Neutral, Line-to-Ground, Neutral-to-Ground
• Enclosure Type: Suitable for indoor installations

Applications & compatibility

This surge protective device is ideal for protecting critical electrical infrastructure in commercial and industrial facilities, including manufacturing plants, data centers, and utility substations. It is commonly deployed in main service entrances, distribution panels, and near sensitive electronic loads to prevent damage and downtime caused by power surges and lightning strikes.

Available from Industrial Automation Co as new, refurbished, or surplus stock, backed by a 2-year warranty with same-day shipping on in-stock items. Request a quote for the Schneider Electric Square D TVS4EMA12SISWT1 or contact our technical team for cross-reference assistance with compatible EMA series components.