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Siemens 3RH2140-2BB40
by Siemens
Read verified buyer reviews ↓OverviewThe Siemens 3RH2140-2BB40 is a high-performance control relay from the SIRIUS 3RH2 series, designed for demanding industrial automation environments. This flexible component includes four normally open (NO) contacts and a robust 24V DC coil, making it suitable for a wide range of control functions. Engineered for seamless integration, this relay provides dependable signal switching, intricate interlocking, and precise auxiliary circuit management across PLC-based automation, motor control systems, and advanced machinery. Its reliable functionality improves system efficiency and safety, making it a vital element for stable industrial processes.Key Features 4 Normally Open (NO) Contacts: Offers extensive capacity for auxiliary control and signaling, ensuring flexible system integration. 24V DC Coil Voltage: Standardized for broad compatibility with industrial power sources and control systems, streamlining installation. High Switching Capacity: Capable of managing considerable electrical loads with superior reliability, guaranteeing consistent performance in crucial applications. Compact & Durable Design: Occupies minimal panel space while providing exceptional longevity, ideal for high-density control panel installations. IEC & UL Compliant: Meets rigorous international safety and performance benchmarks, ensuring peace of mind and global use. Effortless DIN Rail Mounting: Facilitates quick and secure installation, reducing setup time and labor costs. Technical Specifications Model: 3RH2140-2BB40 Series: SIRIUS 3RH2 Contact Configuration: 4 Normally Open (4 NO) Coil Voltage: 24V DC Switching Capacity: Industrial-grade, optimized for auxiliary control ensuring reliable performance. Mounting Type: DIN Rail Certifications: CE, UL, RoHS – Demonstrating adherence to global quality and environmental standards. Applications Industrial Automation Systems: Essential for managing auxiliary circuits in complex PLC and machine automation, ensuring precise operational sequences. Motor Control Systems: Supports interlocking and signaling within motor starters and drives, enhancing operational safety and efficiency. Power Distribution Panels: Improves electrical circuit control and monitoring, offering reliable signal feedback and protective functions. Factory & Process Control: Instrumental in ensuring smooth and continuous operation of automated processes, minimizing downtime and optimizing production. Building Management Systems: Provides reliable control for various building automation functions, from lighting to HVAC, improving overall system intelligence. Why Choose Unmatched Reliability: Manufactured by Siemens, a leader in industrial automation, guaranteeing consistent and dependable signal switching in critical settings. Enhanced System Performance: Boosts control system efficiency and responsiveness through accurate interlocking and auxiliary circuit management. Seamless Integration: Its compact design and standard 24V DC coil voltage allow for straightforward installation and compatibility with existing industrial setups. Robust & Long-Lasting: Built to endure harsh industrial conditions, offering exceptional durability and reducing maintenance needs. Globally Certified Compliance: Adherence to IEC, UL, and RoHS standards ensures safety, quality, and environmental responsibility, facilitating international deployment. Streamlined Installation: Designed for DIN rail mounting, enabling quick and secure setup, which saves valuable time and resources during system deployment. Order NowBoost the performance and reliability of your industrial automation system with the Siemens 3RH2140-2BB40 control relay. Benefit from its superior design, robust features, and proven Siemens quality. Take advantage of our fast shipping and worldwide delivery options.FAQWhat is the primary function of the Siemens 3RH2140-2BB40 control relay?The Siemens 3RH2140-2BB40 control relay is primarily used for reliable signal switching, intricate interlocking, and precise auxiliary circuit control within various industrial automation systems such as PLC-based automation, motor control setups, and advanced machinery.What is the coil voltage of this relay?The Siemens 3RH2140-2BB40 control relay operates with a 24V DC coil voltage, ensuring widespread compatibility with standard industrial power supplies and control systems.How many contacts does this relay have?This control relay features four Normally Open (NO) contacts, providing ample capacity for auxiliary control and signaling functions.Is the Siemens 3RH2140-2BB40 compliant with international standards?Yes, the Siemens 3RH2140-2BB40 control relay adheres to stringent international safety and performance standards, including IEC, UL, and RoHS certifications, ensuring global applicability and peace of mind.What are the primary applications for this control relay?This control relay is ideal for a wide range of applications, including industrial automation systems, motor control systems, power distribution panels, factory and process control, and building management systems.
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Siemens 3RH2140-2BB40
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
- Model: 3RH2140-2BB40
- Series: SIRIUS 3RH2
- Contact Configuration: 4 Normally Open (4 NO)
- Coil Voltage: 24V DC
- Switching Capacity: Industrial-grade, optimized for auxiliary control ensuring reliable performance.
- Mounting Type: DIN Rail
- Certifications: CE, UL, RoHS – Demonstrating adherence to global quality and environmental standards.
Applications
- Industrial Automation Systems: Essential for managing auxiliary circuits in complex PLC and machine automation, ensuring precise operational sequences.
- Motor Control Systems: Supports interlocking and signaling within motor starters and drives, enhancing operational safety and efficiency.
- Power Distribution Panels: Improves electrical circuit control and monitoring, offering reliable signal feedback and protective functions.
- Factory & Process Control: Instrumental in ensuring smooth and continuous operation of automated processes, minimizing downtime and optimizing production.
- Building Management Systems: Provides reliable control for various building automation functions, from lighting to HVAC, improving overall system intelligence.
Why Choose the 3RH2140-2BB40?
- Unmatched Reliability: Manufactured by Siemens, a leader in industrial automation, guaranteeing consistent and dependable signal switching in critical settings.
- Enhanced System Performance: Boosts control system efficiency and responsiveness through accurate interlocking and auxiliary circuit management.
- Seamless Integration: Its compact design and standard 24V DC coil voltage allow for straightforward installation and compatibility with existing industrial setups.
- Robust & Long-Lasting: Built to endure harsh industrial conditions, offering exceptional durability and reducing maintenance needs.
- Globally Certified Compliance: Adherence to IEC, UL, and RoHS standards ensures safety, quality, and environmental responsibility, facilitating international deployment.
- Streamlined Installation: Designed for DIN rail mounting, enabling quick and secure setup, which saves valuable time and resources during system deployment.
Availability & Shipping
- ▸In stock: 3RH2140-2BB40 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 3RH2140-2BB40 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.
Related Siemens resources
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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.