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Siemens 3RH2122-1BB40
by Siemens
Read verified buyer reviews ↓OverviewThe Siemens 3RH2122-1BB40 SIRIUS Contactor Relay provides robust and efficient control for diverse industrial automation needs. This top-tier auxiliary contactor is engineered for exceptional performance and reliability, offering a flexible contact arrangement of two normally open (NO) and two normally closed (NC) contacts. Designed for smooth operation with a 24 V DC coil voltage, it delivers accurate switching capabilities for secondary circuits. Its integrated screw terminals guarantee straightforward and dependable wiring, streamlining both installation and maintenance. This contactor relay exemplifies Siemens' dedication to producing superior industrial control solutions.Key Features Optimal Contact Configuration: Includes 2 Normally Open (NO) and 2 Normally Closed (NC) contacts, providing flexible control choices. Efficient DC Coil Voltage: Operates dependably on a 24 V DC power supply, perfect for integration into various low-voltage control setups. Secure Screw Terminals: Ensures strong and trustworthy electrical connections, simplifying both setup and servicing. Compact S00 Frame Size: Designed for efficient use of space within control panels without sacrificing performance. Exceptional Electrical Durability: Built for up to 10 million operational cycles, guaranteeing long-term stability. Broad Application Versatility: Suitable for various industrial automation, motor management, and general control circuit applications. Wide Operating Temperature Range: Functions effectively in environments from -25°C to +60°C, ensuring reliability in demanding conditions. Technical Specifications Rated Operational Voltage (Ue): Up to 690 V AC Rated Operational Current (Ie): AC-15 (Control of Electromagnetic Loads): At 230 V: 10 A At 400 V: 3 A At 500 V: 2 A At 690 V: 1 A DC-13 (Control of Electromagnetic Loads): At 24 V: 10 A At 110 V: 1 A At 220 V: 0.3 A At 440 V: 0.14 A At 600 V: 0.1 A Insulation Voltage (Ui): 690 V Surge Voltage Resistance: 6 kV Mechanical Life: 30 million operating cycles Ambient Operating Temperature: -25°C to +60°C Mounting Options: DIN rail or robust screw mounting Dimensions (H x W x D): 77.5 mm x 45 mm x 82 mm Net Weight: Approximately 0.271 kg Applications Industrial Automation Systems: Ideal for precise control of auxiliary circuits, ensuring smooth integration with complex control systems. Motor Control Centers (MCCs): A perfect choice for integrating into motor starter combinations, improving the efficiency and safety of motor operations. Lighting Control Systems: Provides dependable switching for various lighting circuits, contributing to energy management and operational efficiency. General Control and Signaling Tasks: Versatile enough for a wide range of control and signaling applications across different industrial sectors. HVAC Systems: Can be effectively used in heating, ventilation, and air conditioning systems for reliable control of auxiliary functions. Process Automation: Essential for performing critical switching tasks in process control, ensuring accuracy and stability. Why Choose? Unmatched Siemens Quality: Benefit from Siemens' renowned engineering excellence and consistent performance in industrial components. Enhanced System Reliability: The robust design and high electrical durability ensure a prolonged operational life, reducing downtime and maintenance costs. Seamless Integration: Its compact S00 frame size and versatile mounting options allow for quick and easy integration into existing or new control panels. Optimized Control Precision: With its 2 NO + 2 NC contact configuration and accurate 24 V DC coil operation, it delivers precise and dependable switching for critical functions. Future-Proof Your Systems: Invest in a component designed for longevity and adaptability, ready to meet evolving industrial control demands. Global Industry Standard: Siemens SIRIUS components are recognized worldwide for their quality and performance. Order NowEnhance your industrial control systems with the Siemens 3RH2122-1BB40 SIRIUS Contactor Relay. Contact us today to place your order and benefit from its superior performance and reliability.FAQWhat is the primary function of the Siemens 3RH2122-1BB40?The Siemens 3RH2122-1BB40 serves as an auxiliary contactor relay, designed for precise switching and control within industrial automation and control applications, particularly for auxiliary circuits.What is the contact configuration of this relay?This relay features a versatile contact configuration of 2 Normally Open (NO) and 2 Normally Closed (NC) contacts, providing flexibility for various control tasks.What coil voltage does the Siemens 3RH2122-1BB40 require?The Siemens 3RH2122-1BB40 is designed to operate efficiently on a 24 V DC coil voltage.What kind of terminals does this contactor relay use?It utilizes secure screw terminals, ensuring reliable electrical connections and simplifying installation and maintenance procedures.What is the expected lifespan of this Siemens contactor relay?This contactor relay boasts exceptional electrical durability, engineered for up to 10 million operational cycles, guaranteeing long-term stability and reducing the need for frequent replacements.
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Siemens 3RH2122-1BB40
Overview
This is a genuine Siemens component from the SIRIUS Contactors family. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.
Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.
Key Features
- Genuine Siemens catalog part
- Tested before shipment
- Backed by PalmPartsSolution warranty
- Cross-reference and revision assistance available
- Compatible with the broader Siemens automation ecosystem
- Engineered to integrate inside SIRIUS Contactors installations
Compatibility
When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Siemens equipment. Where applicable, confirm:
- Input/output voltage and current rating
- Communication protocol and network role
- Mounting form factor and footprint
- Operating temperature, humidity, and IP rating
- Required certifications (UL, CE, ATEX, marine, etc.)
Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.
Replacement Information
Three ways to source this part through PalmPartsSolution:
- Exact replacement — same Siemens catalog number, new or refurbished, tested and warrantied
- Form-fit-function equivalent — alternate revision or build that drops in without code changes
- Engineered migration — current-generation Siemens platform with documented conversion notes for the SIRIUS Contactors family
Contact our engineering team if you need help choosing between these tracks.
Technical Specifications
- Rated Operational Voltage (Ue): Up to 690 V AC
- Rated Operational Current (Ie):
- AC-15 (Control of Electromagnetic Loads):
- At 230 V: 10 A
- At 400 V: 3 A
- At 500 V: 2 A
- At 690 V: 1 A
- DC-13 (Control of Electromagnetic Loads):
- At 24 V: 10 A
- At 110 V: 1 A
- At 220 V: 0.3 A
- At 440 V: 0.14 A
- At 600 V: 0.1 A
- AC-15 (Control of Electromagnetic Loads):
- Insulation Voltage (Ui): 690 V
- Surge Voltage Resistance: 6 kV
- Mechanical Life: 30 million operating cycles
- Ambient Operating Temperature: -25°C to +60°C
- Mounting Options: DIN rail or robust screw mounting
- Dimensions (H x W x D): 77.5 mm x 45 mm x 82 mm
- Net Weight: Approximately 0.271 kg
Applications
- Industrial Automation Systems: Ideal for precise control of auxiliary circuits, ensuring smooth integration with complex control systems.
- Motor Control Centers (MCCs): A perfect choice for integrating into motor starter combinations, improving the efficiency and safety of motor operations.
- Lighting Control Systems: Provides dependable switching for various lighting circuits, contributing to energy management and operational efficiency.
- General Control and Signaling Tasks: Versatile enough for a wide range of control and signaling applications across different industrial sectors.
- HVAC Systems: Can be effectively used in heating, ventilation, and air conditioning systems for reliable control of auxiliary functions.
- Process Automation: Essential for performing critical switching tasks in process control, ensuring accuracy and stability.
Why Choose the 3RH2122-1BB40?
- Unmatched Siemens Quality: Benefit from Siemens' renowned engineering excellence and consistent performance in industrial components.
- Enhanced System Reliability: The robust design and high electrical durability ensure a prolonged operational life, reducing downtime and maintenance costs.
- Seamless Integration: Its compact S00 frame size and versatile mounting options allow for quick and easy integration into existing or new control panels.
- Optimized Control Precision: With its 2 NO + 2 NC contact configuration and accurate 24 V DC coil operation, it delivers precise and dependable switching for critical functions.
- Future-Proof Your Systems: Invest in a component designed for longevity and adaptability, ready to meet evolving industrial control demands.
- Global Industry Standard: Siemens SIRIUS components are recognized worldwide for their quality and performance.
Availability & Shipping
- ▸In stock: 3RH2122-1BB40 ready for immediate dispatch from our Florida warehouse.
- ▸Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
- ▸Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
- ▸Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
- ▸Buy with confidence: Every 3RH2122-1BB40 ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Siemens
Machine down? We ship parts the same day.
New, surplus, and refurbished Siemens inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.
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Independent Supplier Notice
PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.
Product Condition & Firmware
All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.