Siemens 3TH4355-0BB4 Sirius Time Delay Relay

Siemens 3TH4355-0BB4 Sirius Time Delay Relay is a dedicated timing device from Siemens, identified by model 3TH4355-0BB4 and part of the Sirius family. As a time delay relay, it provides a controlled delay between an input signal and its output action in electrical control circuits, enabling sequencing, hold-off, and timed switching within automation and control panels. The Sirius line is known for robust, modular timing components designed for industrial environments, delivering reliable timing functions in a compact form factor. The 3TH4355-0BB4 designation ensures precise cross-referencing in Siemens catalogs and spare-parts inventories, supporting procurement and maintenance in service operations for Siemens-based automation systems. In practice, a time delay relay like this facilitates orderly start-up sequences, interlocks, and delayed release of outputs where timing control is required, making it a suitable choice for panel builders and maintenance technicians aligning with Siemens timing solutions.