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3RT14666AF368K | Contactor, 400 A, AC (50…60 Hz) / DC operation 110…127 V UC aux. contacts 2 NO + 2 NC 3-pole – Siemens
Product Overview
The Siemens 3RT14666AF368K is a high-performance contactor designed for industrial applications requiring reliable switching of high currents. It is suitable for both AC and DC operations, making it versatile for various electrical systems.
Key Features
- Rated Current: 400 A
- Operating Voltage: AC (50…60 Hz) / DC 110…127 V
- Auxiliary Contacts: 2 NO (Normally Open) + 2 NC (Normally Closed)
- Poles: 3-pole
- Mounting Type: Screw mounting
- Enclosure Material: Robust plastic housing
- Contact Material: Silver alloy for high durability and low contact resistance
- Coil Voltage: 110…127 V UC
- Mechanical Life: Up to 10 million operations
- Electrical Life: Up to 1 million operations at rated current
- Protection Class: IP20
- Ambient Temperature Range: -25°C to +60°C
- Standards Compliance: IEC/EN 60947-4-1, UL 508, CSA C22.2 No. 14
Applications
The Siemens 3RT14666AF368K contactor is ideal for use in:
- Motor control centers
- Industrial automation systems
- Power distribution systems
- Heating, ventilation, and air conditioning (HVAC) systems
- Pump and compressor controls
Technical Specifications
| Parameter | Value |
|---|---|
| Rated Operational Current (Ie) | 400 A |
| Rated Operational Voltage (Ue) | AC: 690 V, DC: 440 V |
| Rated Insulation Voltage (Ui) | 1000 V |
| Rated Short-Circuit Making Capacity (Icm) | 10 kA |
| Rated Short-Time Withstand Current (Icw) | 8 kA for 1 second |
| Coil Power Consumption | Approx. 20 W |
| Weight | Approx. 2.5 kg |
Additional Information
For more detailed technical information, installation guidelines, and safety instructions, please refer to the official Siemens product documentation or contact Siemens technical support.
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