The 4532-091-LF is a Gas Discharge Tube (GDT) arrestor manufactured by Yageo, rated at 90V, with a 30% breakdown voltage and a 2KA surge current. It is designed to protect AC or DC power circuits from high-voltage surges. The 4532-091-LF Gas Discharge Tube functions as a surge- or transient-current suppressor that limits the current flow through it to a specified amount. When a high current surge or transient flow reaches the GDT, the gas discharge inside the tube is triggered and the tube is effectively clamped to the rated maximum level. This action absorbs the excess energy and protects the circuit from over-voltage and over-current damage. It is commonly used in applications such as electrical distribution, industrial control, lighting, medical devices, automotive, and military.