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Siemens 3RH2122-2BB40,
by Siemens
Read verified buyer reviews ↓OverviewThe Siemens 3RH2122-2BB40 SIRIUS industrial control relay delivers exceptional performance and steadfast reliability for sophisticated industrial automation and control setups. This vital component effortlessly integrates into various scenarios, offering robust switching capabilities for both auxiliary and control circuits. Equipped with four normally open (4NO) contacts and an efficient 24V DC coil, this relay guarantees accurate and dependable signal transmission, promoting the continuous and smooth functioning of crucial circuits. Its compact and sturdy build, coupled with its suitability for demanding operational settings, positions it as an indispensable asset for modern industrial infrastructure, encompassing advanced switchgear, PLC interface applications, and a broad spectrum of industrial control panels.Key Features Dependable 4 Normally Open (4NO) Contacts Achieve consistent and reliable control circuit switching, essential for precise operation within any automated system. Optimized 24V DC Coil Voltage Ensures stable, energy-efficient, and consistent operation across various automation systems, minimizing downtime and maximizing productivity. Space-Saving Compact & Modular Design Facilitates effortless integration into even the most constrained control cabinets, optimizing panel space and simplifying system layouts. Exceptional Electrical & Mechanical Durability Built for an extended operational lifespan in demanding industrial applications, offering superior resistance to wear and tear. User-Friendly DIN Rail Mounting Enables quick, secure, and hassle-free installation, reducing setup time and labor costs. Broad Application Versatility Perfectly suited for a multitude of industrial uses, from basic switching functions to complex interlocking systems. Meets Industry Compliance Standards Adheres strictly to relevant industrial automation and electrical safety regulations, ensuring peace of mind and operational security. Technical SpecificationsThe Siemens 3RH2122-2BB40 is a high-grade SIRIUS Industrial Control Relay. Its precise engineering ensures optimal functionality and longevity. Key technical details include: Product Type: SIRIUS Industrial Control Relay Part Number: 3RH2122-2BB40 Manufacturer: Siemens Coil Voltage: 24V DC Contacts: 4 Normally Open (4NO) Mounting Type: DIN Rail Compliance: Engineered to meet stringent industrial automation and electrical safety standards, guaranteeing reliable and secure operation. Operational Temperature Range: Designed to perform reliably across diverse industrial temperatures. Expected Lifespan: Extended electrical and mechanical life for reduced maintenance and replacement costs. ApplicationsThe versatility and robustness of the Siemens 3RH2122-2BB40 make it an ideal choice for enhancing a diverse range of industrial operations: Advanced Automation Systems Crucial for controlling precise signal transmission between Programmable Logic Controllers (PLCs) and various actuators, ensuring coordinated system responses. Integrated Switchgear & Control Panels Provides reliable circuit operation and interlocking functions within complex industrial environments, safeguarding equipment and personnel. Efficient Motor & Machine Control Supports auxiliary switching functions within motor circuits, enabling precise control over machinery operations and protecting valuable assets. Industrial Process Control Essential for managing and regulating various stages of industrial processes, contributing to optimized production workflows. Building Management Systems Can be utilized for controlling lighting, HVAC, and other critical building services in industrial facilities. Energy Distribution Systems Facilitates safe and efficient management of power within industrial setups, enhancing overall energy reliability. Why ChooseSiemens is a world leader in industrial automation, and the 3RH2122-2BB40 exemplifies this reputation with unmatched reliability and performance. This model offers dependable control in demanding environments, ensuring seamless operation and boosting productivity across various industrial applications. Its robust design and adherence to industry standards provide a confidence in its ability to deliver lasting performance and contribute to the efficiency and safety of your operations.Order NowUpgrade your industrial control systems with the Siemens 3RH2122-2BB40 SIRIUS industrial control relay. Its advanced features and proven durability make it an excellent investment for enhancing operational efficiency and reliability.FAQWhat is the primary function of the Siemens 3RH2122-2BB40 relay?The Siemens 3RH2122-2BB40 is an industrial control relay designed for robust switching in auxiliary and control circuits within complex industrial automation and control systems.What type of contacts does this relay feature?This relay is equipped with four normally open (4NO) contacts, ensuring precise and dependable signal transmission.What is the coil voltage required for this relay?The Siemens 3RH2122-2BB40 operates with an optimized 24V DC coil voltage.Is this relay suitable for industrial environments?Yes, its compact and durable construction, along with its exceptional electrical and mechanical durability, makes it ideal for high-performance and demanding industrial applications.How is the Siemens 3RH2122-2BB40 mounted?It features user-friendly DIN rail mounting, allowing for quick, secure, and hassle-free installation.
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Siemens 3RH2122-2BB40,
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
The Siemens 3RH2122-2BB40 is a high-grade SIRIUS Industrial Control Relay. Its precise engineering ensures optimal functionality and longevity. Key technical details include:
- Product Type: SIRIUS Industrial Control Relay
- Part Number: 3RH2122-2BB40
- Manufacturer: Siemens
- Coil Voltage: 24V DC
- Contacts: 4 Normally Open (4NO)
- Mounting Type: DIN Rail
- Compliance: Engineered to meet stringent industrial automation and electrical safety standards, guaranteeing reliable and secure operation.
- Operational Temperature Range: Designed to perform reliably across diverse industrial temperatures.
- Expected Lifespan: Extended electrical and mechanical life for reduced maintenance and replacement costs.
Applications
The versatility and robustness of the Siemens 3RH2122-2BB40 make it an ideal choice for enhancing a diverse range of industrial operations:
-
Advanced Automation Systems
Crucial for controlling precise signal transmission between Programmable Logic Controllers (PLCs) and various actuators, ensuring coordinated system responses.
-
Integrated Switchgear & Control Panels
Provides reliable circuit operation and interlocking functions within complex industrial environments, safeguarding equipment and personnel.
-
Efficient Motor & Machine Control
Supports auxiliary switching functions within motor circuits, enabling precise control over machinery operations and protecting valuable assets.
-
Industrial Process Control
Essential for managing and regulating various stages of industrial processes, contributing to optimized production workflows.
-
Building Management Systems
Can be utilized for controlling lighting, HVAC, and other critical building services in industrial facilities.
-
Energy Distribution Systems
Facilitates safe and efficient management of power within industrial setups, enhancing overall energy reliability.
Why Choose the 3RH2122-2BB40?
Siemens is a world leader in industrial automation, and the 3RH2122-2BB40 exemplifies this reputation with unmatched reliability and performance. This model offers dependable control in demanding environments, ensuring seamless operation and boosting productivity across various industrial applications. Its robust design and adherence to industry standards provide a confidence in its ability to deliver lasting performance and contribute to the efficiency and safety of your operations.
Availability & Shipping
- ▸In stock: 3RH2122-2BB40 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 3RH2122-2BB40 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.