Siemens SIRIUS 3RT2926-1CD00 RC Element Surge Suppressor for 3RT2.2 Contactors, 127-240V AC / 150-250V DC, Size S0 Original Brand New

Overview: Siemens SIRIUS 3RT2926-1CD00 Surge Suppressor

The Siemens SIRIUS 3RT2926-1CD00 is a high-performance RC element surge suppressor designed to protect the coils of SIRIUS 3RT2.2 power contactors (Size S0) against transient voltage peaks (spikes) caused by switching operations. As an essential component for industrial control, this clip-on suppressor ensures the reliability and longevity of your contactor and connected equipment.

It is engineered for versatile control supply voltages, compatible with a range of both AC and DC systems. The easy clip-on mounting design allows for quick and efficient installation directly onto the front of the contactor without altering its external dimensions, simplifying maintenance and system upgrades.

Key Technical Specification

• Product Brand: SIRIUS
• Product Type: Surge Suppressor (RC Element)
• Contactor Size Suitability: Size S0 (for 3RT2.2 contactors)
• Rated Control Supply Voltage (AC): 127 – 240 V AC, 50/60 Hz
• Rated Control Supply Voltage (DC): 150 – 250 V DC
• Mounting: Clip-on (front side of contactor)

Benefit

• Extended Equipment Lifespan: Protects contactor coils and associated control electronics from damaging voltage transients, reducing the need for premature replacement.
• Enhanced System Reliability: Minimizes electrical noise and interference that can lead to false tripping or malfunctions in sensitive control systems.
• Space & Cost Efficiency: The clip-on design does not increase the contactor’s overall dimensions, saving valuable space in control panels and simplifying installation.
• Broad Compatibility: Suitable for use across a wide range of common international AC and DC control voltages, offering flexibility in global applications.
• Genuine Siemens Quality: Manufactured by Siemens under the reliable SIRIUS product line, ensuring compliance with international safety and performance standards (CE, UL, CSA approved).

Function

The RC (Resistor-Capacitor) element in the 3RT2926-1CD00 functions by providing an alternate path for the stored inductive energy when the contactor coil is de-energized. During the interruption of current to an inductive load (like a contactor coil), the rapid change in magnetic flux generates a high-voltage spike (back EMF). The RC element shunts this voltage spike, reducing its peak magnitude and rate of rise, thereby protecting the coil’s insulation and preventing excessive noise generation that could affect nearby sensitive electronic devices.

Application

The Siemens 3RT2926-1CD00 is specifically designed for use as an accessory with the SIRIUS 3RT2.2 series contactors (Size S0) in various industrial control applications, including:

• Motor starting and control panels.
• Switching resistive and small inductive loads.
• Automation systems requiring reliable contactor operation.
• Any application where minimizing switching surges is critical for system integrity.

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