Overview
The Siemens 3RT2337-1AL20 is a robust and reliable 4-pole AC-1 contactor from the advanced SIRIUS 3RT23 generation, designed specifically for controlling resistive loads. This high-performance industrial contactor serves as the direct successor to the phased-out 3TK10 to 3TK14 series, ensuring seamless transitions for your control panel upgrades. Engineered for superior performance in demanding environments, the 3RT2337-1AL20 operates efficiently at 110 A for 400 V AC at 40 °C, making it an ideal choice for a wide range of industrial applications requiring reliable power switching.
Function
The Siemens 3RT2337-1AL20 contactor is primarily used for switching resistive loads in AC-1 applications. Its 4-pole configuration allows for efficient control of multi-phase circuits. The integrated 1 NO + 1 NC auxiliary contacts provide essential feedback and interlocking capabilities, enhancing the safety and functionality of your control systems. The robust screw terminals ensure secure and reliable electrical connections, facilitating easy installation and maintenance within industrial control panels.
Benefit
- Enhanced Reliability: Part of the modern SIRIUS 3RT23 series, known for its high quality and dependable operation in industrial settings.
- Future-Proof Solution: Direct successor to the phased-out 3TK1 series, ensuring long-term availability and support for your systems.
- Versatile Application: Ideal for a broad spectrum of AC-1 resistive load applications in various industries.
- Easy Integration: Standardized S2 size and screw terminals simplify installation and integration into existing or new control cabinets.
- Comprehensive Safety: Built to international standards (IEC 60947 series) for reliable and safe operation.
- Auxiliary Contact Flexibility: Includes 1 NO and 1 NC auxiliary contacts for greater control and monitoring capabilities.
- Surge Suppression Ready: Designed to be compatible with RC elements for surge suppression (accessories sold separately).













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