Siemens 3RT2926-1BC00 Varistor Surge Suppressor 48-127V AC/DC Original Brand New

Overview: Siemens 3RT2926-1BC00 Varistor Surge Suppressor

The Siemens 3RT2926-1BC00 is a highly effective varistor surge suppressor designed specifically for use with SIRIUS 3RT2.2 power contactors (Size S0). It provides essential coil protection against high-voltage spikes and transient surges that can occur during the switching operations of inductive loads. Integrating this component is crucial for enhancing the longevity and reliability of your contactor and overall control system.

The unit is engineered for broad compatibility, supporting a control supply voltage range of 48-127 V AC (at 50/60 Hz) and 70-150 V DC. Installation is simplified via an easy, clip-on design that fits directly into the contactor's coil terminal, without increasing the overall external dimensions of the contactor assembly.

Benefit

1. Extended Contactor Lifespan: Protects the contactor coil and connected control electronics from damaging voltage spikes, significantly increasing the operational life of the equipment.
2. System Reliability: Prevents spurious faults and failures in the control system caused by electrical transients.
3. Easy Installation: Designed for a simple, clip-on fit into the 3RT2.2 contactor, requiring no special tools or complex wiring modifications.
4. Compact Design: Integrates seamlessly without affecting the contactor's footprint, maintaining a compact control panel layout.

Function

The varistor (Voltage Dependent Resistor) technology in the 3RT2926-1BC00 acts as a fast-acting voltage clamp. When the contactor coil is de-energized, it generates a high-energy inductive spike (a surge). The varistor shunts this excessive voltage away from the coil and control circuit, dissipating the energy and keeping the voltage within safe limits. This ensures that the associated control components (like PLC outputs or other switching devices) are not damaged.

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