**Product Description**: Siemens Silent Contactor (Model 5TT5831-0) is a noise-free AC contactor designed for residential and commercial applications. It features a quiet electromagnetic system with 3NO+1NC contact configuration, operating at 220 V AC and supporting loads up to 25 A. **Technical Specifications**: - Contact Configuration: 3NO+1NC - Rated Current: 25 A - Coil Voltage: 220 V AC - Operating Voltage: 220 V AC / 50-60 Hz - Application: Lighting control, HVAC systems, water heaters, and general automation - Mounting: DIN rail - Noise Level: Ultra-low (suitable for quiet zones) **Applications**: - Home automation systems for noise-sensitive environments - Smart building lighting control - Energy-efficient control in commercial spaces - Residential HVAC and water heating automation