Siemens SIRIUS 3RT2037-1AH20 Power Contactor 65A, 30kW, 400V, 48V AC Coil, Size S2 Original Brand New

Overview: Siemens 3RT2037-1AH20 SIRIUS Power Contactor

The Siemens 3RT2037-1AH20 is a high-performance, 3-pole power contactor from the compact and reliable SIRIUS 3RT2 series. Designed for the safe and efficient switching of electric motors, this contactor is engineered for use in demanding industrial control applications. Its robust design, international approvals (IEC, UL/CSA), and comprehensive accessory range make it an essential component for motor starters and control systems.

This specific model is a Size S2 contactor, rated for an operational current of 65 A in AC-3/AC-3e duty, corresponding to a maximum operational power of 30 kW at 400 V. It features an integrated $48\text{V AC},50/60\text{ Hz}$ coil and comes equipped with an internal arrangement of $1\text{ NO}+1\text{ NC}$ auxiliary contacts, providing immediate control and feedback functionality. Connection is made simple and secure via screw terminals.

Benefit

1. High Reliability: Part of the globally proven SIRIUS modular system, ensuring high contact reliability and long service life (typical $10$ million mechanical operating cycles).
2. Space-Saving Design: The compact Size S2 design allows for optimized space utilization within control panels and electrical cabinets.
3. Versatile Application: Suitable for a wide range of motor and load switching applications, conforming to both AC-3 and the energy-efficient AC-3e operating categories.
4. Easy Integration: Comes with integrated $1\text{ NO}+1\text{ NC}$ auxiliary contacts for straightforward implementation into control circuits and signaling systems.
5. Secure Wiring: Features robust screw terminals on both main and auxiliary circuits for secure, reliable electrical connections.

Function

The 3RT2037-1AH20 serves as a core component in motor control circuits. It is an electromagnetic switch designed to handle high main circuit currents ($65\text{ A}$) and switch high-power loads ($30\text{ kW}$) under the command of a low-power control signal ($48\text{ V AC}$).

• Main Function: Safely makes and breaks the connection between the power supply and a 3-phase electric motor.
• Auxiliary Function: The built-in $1\text{ NO}$ (Normally Open) and $1\text{ NC}$ (Normally Closed) contacts are used in the control circuit for interlocking, status indication, and feedback to a PLC or control system.

Compatibility & Accessories

The SIRIUS 3RT2 series offers a comprehensive ecosystem of compatible accessories for enhanced functionality, including:

• Overload Relays (e.g., SIRIUS 3RU2/3RB3): Direct mounting for complete motor protection.
• Auxiliary Switch Blocks: For adding extra signaling and control contacts (front and side mounting options).
• Surge Suppressors: Protect the control coil against voltage peaks.
• Link Modules: For building reversing starters and star-delta starters.

For more products from the SIRIUS line or to explore compatible motor protection solutions, visit Turll today!