SIEMENS 3RT1926-1ER00 Varistor Suppress

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SIEMENS 3RT1926-1ER00 Varistor Suppressor

The SIEMENS 3RT1926-1ER00 is a varistor-based surge suppressor (also called a RC snubber) designed for SIRIUS 3RT series contactors and relays. It protects control circuits from voltage spikes caused by inductive load switching (e.g., contactor coil de-energization), preventing damage to sensitive electronic components such as PLCs, relays, and switches .

Key Features & Advantages

1. Effective Voltage Spike Suppression

   • Absorbs inductive kickback from contactor/relay coils, reducing arcing and contact erosion in control switches .

   • Extends the lifespan of connected devices by preventing overvoltage damage .

2. Wide Compatibility

   • Designed for 3RT10/3RT1 contactors (e.g., 3RT1025-1BB40, 3RT1034-1AG20) .

   • Supports AC 24–48V and DC 24–70V control circuits .

3. Compact & Easy Installation

   • Snap-on mounting directly onto compatible contactors (e.g., front-mounted for S00 size) .

   • No tools required for installation .

4. Industrial Durability

   • IP20 protection against dust and accidental contact .

   • RoHS-compliant, meeting global environmental standards .

Technical Specifications

Applications

• Motor control panels: Protects PLC outputs driving contactor coils .

• HVAC systems: Prevents voltage spikes in relay-controlled fans/pumps .

Installation Notes

• Mandatory for frequent switching: Required in high-cycle applications to avoid contact degradation .

• Optional for infrequent use: May be omitted in low-duty scenarios .

The structure and details of the product：

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