Siemens 3TX4440-0A Auxiliary Contact 10A 240V General Use

Siemens 3TX4440-0A is an auxiliary contact block that adds four normally open contacts to compatible Siemens contactors, enabling multiple signaling points from a single device. Designed for general use, this block is rated for 10 A at up to 240 V AC and features screw-terminal connections for reliable field wiring. The 3TX4440-0A expands control circuits by providing dry-contact outputs that can be wired to PLC inputs, interlocks, or signaling modules, helping you monitor contactor status and implement simple interlocks or safety logic. Built to integrate with Siemens contactor assemblies, it serves as a compact expansion accessory without altering the main coil circuit. With four NO contacts, it gives you additional sensing or control paths while maintaining compatibility with standard Siemens mounting conventions for auxiliary blocks. Ideal when you need extra NO signaling lines in motor-control or automation panels, this block keeps wiring tidy and dependable, and its rated 240 VAC general-use capability supports a wide range of control circuits commonly found in industrial automation.