ABB 1SBN050020R1000 is a surge arrestor, noise suppression diode, and 12÷32VDC unit. It is designed for protecting electrical systems from voltage spikes caused by lightning strikes, power outages, and other sources, as well as suppressing radio frequency interference from external electromagnetic sources. It includes a transient voltage suppressor diode, also known as a ‘TVS’ diode, for reducing the energy of sudden voltage spikes and current surges. This unit is rated to operate in temperatures up to 125°C, and is designed for EMC compliance to EN 61347-1. Additionally, it meets requirements for UL 1449 and IEC 61643-1.