Siemens 3RT2936-1BD00 Varistor Surge Suppressor S2/S3 Original Brand New

Key Benefit

• Maximized Equipment Life: Protects the delicate electronics of your contactor coil and surrounding control components from damaging voltage spikes.
• Universal Compatibility: Works across a broad range of AC and DC control voltages, simplifying inventory and application use.
• Simple, Tool-Free Installation: Features a clip-on/snap-in mounting method for quick integration into the designated slot on the SIRIUS 3RT2 contactors (Sizes S2 and S3).
• Space-Saving Design: Integrates into the contactor without affecting its external dimensions, preserving panel space.
• Global Compliance: Certified with CE / UL / CSA marks for reliable use in international industrial applications.

Function and Application

The 3RT2936-1BD00 varistor acts as a voltage-dependent resistor. When the control coil of the contactor is switched off, it generates a high-voltage surge (inductive kickback). The varistor immediately limits this potentially destructive overvoltage to a safe level, dissipating the excess energy as heat. This protective function is crucial for:

1. Protecting PLC/Controller Outputs: Prevents high-voltage spikes from feeding back and damaging sensitive transistor or relay outputs.
2. Maintaining System Uptime: Reduces component failure, minimizing costly downtime for maintenance and replacement.
3. Ensuring Reliable Switching: Essential for any application using Siemens SIRIUS 3RT2 motor contactors in demanding industrial control systems.

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