Siemens Industry Automation 3SB3400-0A Contact Block

Siemens 3SB3400-0A is a front‑plate mounted contact block for 22 mm Signum pushbutton assemblies, delivering two contacts in one module: 1 normally open (NO) and 1 normally closed (NC), wired via screw terminals for secure wiring. It is designed to pair with 3SB3 operator modules in Siemens’ Signum line, enabling auxiliary signaling or interlock applications within control panels and automation circuits. Electrical ratings include insulation voltage up to 400 V, impedance-free impulse voltage resistance around 4 kV, and a thermal current of 10 A, making it suitable for signaling and feedback tasks in AC/DC circuits. The operating temperature range is −25 to 70°C, supporting typical industrial environments. This block complements other front‑mounted accessories in the Siemens 3SB3 family to extend functionality of compact 22 mm control stations without needing额 separate components.