Siemens Contactor relay, S00, auxiliary switch, screw terminal, 7NO+1NC, 24VDC Part number 3RH2271-1BB40

Product Overview

The Siemens SIRIUS 3RH2271-1BB40 is a coupling contactor relay (frame size S00) featuring 7 normally-open (NO) contacts and 1 normally-closed (NC) contact, with a 24 V DC coil and screw-type terminals. It is designed for auxiliary circuit switching in control systems, offering high reliability and compact installation for industrial applications.

Key Features

• Contact Configuration: 7 NO + 1 NC instantaneous auxiliary contacts
• Control Coil: 24 V DC operation, coil power approx. 4 W
• Size Frame: S00 – compact design
• Terminal Type: Screw-type connections for reliable wiring
• High Insulation: Rated insulation voltage 690 V AC, surge voltage resistance 6 kV
• Ambient Temperature Range: –25 °C to +60 °C during operation
• Mechanical Service Life: Approx. 10,000,000 switching operations typical
• Switching Ratings: AC-15: 6 A at 230 V, 3 A at 400 V | DC-12: 10 A at 24 V

Technical Specifications

• Product Series: SIRIUS 3RH2 coupling contactor relays
• Rated Control Supply: 24 V DC (0.8 … 1.1 of rated coil voltage tolerance)
• Coil Holding/Closing Power: 4 W (typical)
• Closing Delay: 30 … 100 ms (at 70% of rated coil voltage) | Opening Delay: 7 … 13 ms
• Auxiliary Contacts – Number and Type: 7 × NO, 1 × NC (instantaneous)
• Rated Insulation Voltage (Ui): 690 V AC (pollution degree 3)
• No-load Switching Frequency: AC: 10,000 switches per hour | DC: same
• Mounting: Snap-on or screw mounting onto 35 mm DIN rail | Height: 57.5 mm | Width: 45 mm | Depth: 117 mm
• Operating Ambient Temperature: –25 °C … +60 °C | Storage: –55 °C … +80 °C
• Country of Origin: Germany

Compliance & Certifications

• CE Marking: Conforms to EU Low-Voltage and Machinery Directives
• IEC/EN Standards: IEC 60947-4-1, IEC 60947-5-1 for auxiliary contact operation
• RoHS Compliant: Meets Siemens hazardous-substance restrictions (since 01.10.2009)
• Protection Class: IP20 (finger-safe terminals, front side)
• Product Classification: Industrial auxiliary switching relay/coupler

Applications

Ideal for switching and controlling auxiliary circuits, interlocks and control panels in automation systems, machine building, packaging lines and material-handling installations. Commonly used where a high number of change-over auxiliary contacts is required in a compact relay form factor integrated into control cabinets.