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The SIEMENS 3SB3403-0D is a contact block designed for use with industrial control devices such as pushbutton assemblies and selector switches. Contact blocks serve as the electrical switching element in a control circuit, opening or closing a circuit path when the actuator above them is engaged. This unit is a compact, low-profile component intended for panel-mount control stations and is installed by licensed electricians or qualified control panel technicians working on industrial or commercial electrical systems.
The 3SB3403-0D is suited for industrial control panel applications where a reliable auxiliary contact element is needed. It mounts to compatible 3SB-series operator devices and is commonly found in machine control panels, motor starter stations, and process control enclosures in both light industrial and heavy commercial settings.
Designed as an OEM-style replacement or add-on contact block for use with SIEMENS 3SB-series pushbutton and selector switch operator assemblies.
Installation should be performed by a licensed electrician in accordance with applicable NEC requirements. De-energize and lock out the control panel before installing or replacing contact blocks. Verify the actuator and contact block series are matched before assembly. Do not exceed the contact rating of the device as specified on the component markings.
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