ABB OVRT23N40150PTSU Overvoltage Protection Relay

ABB OVRT23N40150PTSU is a plug‑in Type 2 surge protective device (SPD) designed for DIN‑rail mounting in industrial control panels. Configured for 3‑phase plus neutral (4‑pole) systems, it delivers transient suppression with a 175/350 V rating at 50/60 Hz and a 200 kAIC short‑circuit rating, making it suitable for protecting feeders, transformers, and other critical loads. It supports four protection modes—L‑L, L‑N, L‑G, and N‑G—with a response time of under 25 ns to clamp surges quickly, helping safeguard downstream equipment such as PLCs and drives. An auxiliary contact provides remote/status indication for panel monitoring, while the gray NEMA 1 enclosure and DIN‑rail mounting suit indoor installations. Overall dimensions are 71.2 mm wide by 64.8 mm deep by 98.5 mm high. The device is specified for 50/60 Hz operation and operates across a wide temperature range from −40 to 80 °C (−40 to 176 °F). With nominal discharge current of 20 kA and a peak surge current of 40 kA, the OVRT23N40150PTSU offers robust transient protection in a compact four‑pole footprint, ideal for protecting feeders, transformers, and other sensitive equipment inside industrial control panels.