The Schneider Electric Square D TVS4HEMA20AI is a surge protection device (SPD) designed for 480Y/277 VAC, 3-phase, 3-wire electrical systems. This unit is engineered to safeguard sensitive equipment from transient overvoltages, ensuring operational continuity in demanding industrial environments. It is part of the HEMA series of surge protection solutions from Schneider Electric Square D.

Technical details

• Series: HEMA
• Voltage Configuration: 480Y/277 VAC
• Phase: 3-Phase
• Wire Configuration: 3-Wire
• Short-Circuit Current Rating (SCCR): 200 kA
• Protection Mode: L-L, L-G, L-N
• Connection Type: Hardwired
• Indicator: Visual status indicator

Applications & compatibility

This surge protection device is suitable for protecting critical electrical infrastructure in facilities such as manufacturing plants, data centers, and commercial buildings. It is commonly integrated into main electrical panels and distribution systems to mitigate the impact of lightning strikes and utility-switching transients on connected machinery and control systems.

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 TVS4HEMA20AI or contact our technical team for cross-reference assistance with compatible HEMA series components.