3RH2122-1BB40 – Siemens SIRIUS Contactor Relay, 2NO+2NC, 24VDC, In Stock
Buy the Siemens 3RH2122-1BB40, a SIRIUS 3RH2 auxiliary contactor relay, 2 NO + 2 NC, 24 V DC coil, screw terminal, Size S00. In stock and available for fast shipping. Get a quote today.
Key Technical Specifications
- Product Type: Contactor relay (auxiliary contactor), SIRIUS 3RH2 series
- Contactor Size: S00
- Contact Configuration: 2 NO + 2 NC (4-pole basic version)
- Coil Voltage: 24 V DC
- Terminal Type: Screw terminal
- Power Loss (No Load Current, Typical): 4 W
- Rated Insulation Voltage (AC, Degree of Pollution 3): 690 V
- Rated Impulse Withstand Voltage (Uimp): 6 kV
- Shock Resistance (Rectangular Impulse, DC): 10g/5ms, 5g/10ms
- Shock Resistance (Sine Pulse, DC): 15g/5ms, 8g/10ms
- Mechanical Service Life (Contactor, Typical): 30,000,000 cycles
- Mechanical Service Life (With Added Auxiliary Switch Block): 10,000,000 cycles
- Protection Class (Front): IP20
- Protection Against Electrical Shock: Finger-safe
- Degree of Pollution: 3
- Ambient Temperature (Operation): -25°C to +60°C
- Ambient Temperature (Storage): -55°C to +80°C
- Installation Altitude (Max.): 2000 m
Design and Performance
Expandable 4-Pole Design for Flexible Control Circuits
The basic version of the contactor relay is a 4-pole design (2NO+2NC) which can be extended up to 8 poles using snap-on auxiliary switches, giving flexibility to scale control circuit switching as application needs grow.
Direct Replacement for the Legacy 3RH1 Series
The 3RH2122-1BB40 is a direct electrical and physical replacement for the obsolete 3RH1122-1BB40, though existing 3RH1911 auxiliaries, varistors, RC elements, or diodes would need to be replaced as they don’t mount to this newer relay style.
Exceptional Mechanical Durability
Rated for a typical 30,000,000 mechanical operating cycles, this contactor relay supports long-term reliability in control circuits with frequent switching, minimizing the need for premature replacement.
Finger-Safe Design for Enhanced Installation Safety
Protection against electrical shock via a finger-safe design, combined with IP20 front protection, supports safer handling during installation and maintenance in control cabinets.
Shared Accessory Compatibility with 3RT2 Contactors
The extensive range of accessories for 3RT2 contactors in sizes S00 to S3 can also be used for 3RH2 contactor relays, simplifying spare parts sourcing and system standardization across a facility’s control panels.
Why Buy the 3RH2122-1BB40 From Us
- In stock and ready for immediate dispatch
- Fast shipping on every order
- Commercial advisory support to help you confirm the right SIRIUS 3RH2 configuration for your control circuit
- Competitive pricing — get a quote in minutes
