Description
The Siemens 3RT2018-2FB42 is a 3-pole power contactor from the SIRIUS 3RT2 series, designed for reliable switching of AC-3 loads (squirrel cage motors) and general AC-1/AC-3 applications. Rated for 18 A at 400 V AC, it features a compact design with a 4-pole auxiliary contact configuration (1 NO + 1 NC) and is available with both AC and DC coil variants for flexible control circuit integration.
Key Features
- Rated Current: 18 A (AC-3, 400 V)
- Poles: 3 main poles + 1 NO + 1 NC auxiliary contacts
- Coil Voltage: Available in multiple AC/DC voltages (e.g., 24 V DC, 110 V AC, 230 V AC)
- Mounting: Snap-on mounting (22.5 mm width) compatible with Siemens contactor accessories
- Standards: IEC 60947-4-1, CE, UL/CSA listed
Technical Specifications
- Utilization Category: AC-3 (motor starting), AC-1 (resistive)
- Rated Insulation Voltage (Ui): 690 V
- Rated Operational Current (Ie):
- AC-3 (400 V): 18 A
- AC-1 (400 V): 25 A
- Thermal Current (Ith): 25 A
- Mechanical Life: ≥ 10 million operations
- Electrical Life (AC-3): ≥ 1.2 million operations
- Coil Power Consumption: ~ 8 W (AC), ~ 9 W (DC)
- Weight: Approx. 210 g
- Connection: Screw terminals (main and auxiliary)
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty
- Technical support for coil voltage selection and wiring
- Compatibility verification with overload relays (e.g., 3RU2 series)
- Thermal overload protection coordination support
Delivery Time
- Standard delivery: 3-5 working days
- Express shipping available upon request
Why Choose Our Store
- Genuine Siemens industrial control components
- Global supply network with competitive pricing
- Expertise in SIRIUS contactor and relay systems
- Comprehensive technical documentation (datasheets, manuals)
- Responsive customer service and support
Applications
- Motor control centers (MCC)
- Compressor and pump control
- Conveyor belt systems
- HVAC and building automation
- Industrial machinery control panels
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