What is the Siemens 3RH21221BB40 IEC Control Relay used for?

The Siemens 3RH21221BB40 IEC Control Relay is designed for various automation applications, particularly in industrial environments. It facilitates control and monitoring of electrical circuits, enabling users to manage loads effectively through its 2 Normally Open (NO) and 2 Normally Closed (NC) contacts. This makes it essential for automation systems, motor control, and lighting applications. For instance, it can be used to control a motor's start and stop sequences, ensuring reliable operation in machinery.

What are the specifications of the Siemens 3RH21221BB40 Control Relay?

This control relay operates at a rated voltage of 24V DC, making it ideal for low-voltage control applications. It features a compact Size S00 format which is suitable for applications with limited space. The inclusion of 2 NO and 2 NC contacts allows for versatile control schemes in automation setups, making it perfect for both simple and complex electrical controls. These specifications ensure it can effectively manage multiple signals and control operations with high reliability.

Can the Siemens 3RH21221BB40 relay be used in outdoor applications?

While the Siemens 3RH21221BB40 relay can work in various settings, it is typically recommended for indoor use within an enclosure to protect it from weather elements. Its construction can endure moderate environmental conditions, but for outdoor applications, additional protective barriers, such as enclosures, may be necessary. This consideration safeguards its functionality and longevity when used in changing climates, particularly in outdoor machinery or remote operations.

How does the screw terminal feature benefit installation?

The screw terminal design of the Siemens 3RH21221BB40 relay ensures secure and reliable connections. This feature simplifies the installation process as it allows for quick and firm connections to wires without the need for special tools. The screw terminals can accommodate a variety of wire gauges, enhancing flexibility during setup. This is particularly advantageous in applications where frequent changes or servicing are required, as it allows for straightforward disconnection and reconnection of wires.

Is the Siemens 3RH21221BB40 compatible with other Siemens products?

Yes, the Siemens 3RH21221BB40 relay is compatible with other Siemens automation and control products, allowing for seamless integration into various systems. It can easily work with Siemens programmable logic controllers (PLCs) and distributed I/O systems. This compatibility is beneficial in creating cohesive automation solutions that enhance operational efficiency, making the setup of complex control circuits more manageable.

What are common applications for the Siemens 3RH21221BB40 relay?

The Siemens 3RH21221BB40 relay is commonly used in industrial machinery for motor control, lighting circuits, and process automation. Its reliable performance under load makes it ideal for starting and stopping motors, triggering alarms, or controlling lighting systems in large facilities. For example, it can be integrated into an assembly line's control panel to manage various equipment actions, enhancing productivity and operational safety.

What safety features does the Siemens 3RH21221BB40 offer?

The Siemens 3RH21221BB40 relay is built with safety in mind, featuring robust build quality and standardized IEC certification for compliance. This relay includes overcurrent and overload protection, which helps safeguard connected devices by automatically interrupting circuits under fault conditions. Such safety measures are critical in preventing equipment damage and ensuring safe operational practices, particularly in environments with potentially hazardous machinery.

What installation considerations should I keep in mind with this relay?

When installing the Siemens 3RH21221BB40 relay, it’s important to consider the ambient temperature and mounting location to ensure optimal operation. Make sure to provide sufficient ventilation and avoid locations with excessive dust or moisture. Additionally, proper electrical rating must be adhered to avoid premature failure. Following these guidelines helps maintain the relay’s performance and reliability in various operational contexts.

How does this relay handle power fluctuations?

The Siemens 3RH21221BB40 relay is designed to be resilient to power fluctuations within its specified operating range. Its internal circuitry helps manage transient voltages and ensure stable operations under fluctuating conditions. This reliability is vital in industrial applications where power supply can be inconsistent, such as in manufacturing setups where machinery might be subjected to surges or drops in power, reducing the risk of operational disruptions.

Where can I buy the Siemens 3RH21221BB40 IEC Control Relay in New Zealand?

You can purchase the Siemens 3RH21221BB40 IEC Control Relay at Ubuy. Ubuy offers a wide range of Siemens products, ensuring you can find the specific model you need for your control applications. They also provide a user-friendly platform for navigating through the purchasing process, making it simple to select your preferred options.

How to Shop Siemens 3RH21221BB40 IEC Control Relay, 24VDC, Online From Ubuy?

It’s easy to shop Siemens 3RH21221BB40 IEC Control Relay, 24VDC, online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.

Is Siemens 3RH21221BB40 IEC Control Relay, 24VDC, Available to Shop Online in New Zealand?

Yes, at Ubuy New Zealand this product is available for you to shop at a reasonable price. The Siemens 3RH21221BB40 IEC Control Relay, 24VDC, is not available locally but you can trust us with our express shipping services.

How Long Does It Take to Get Product After Placing the Order?

The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

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SIRIUS 3RH Control Relays are perfect for installations subject to variable voltage and high temperatures.

SIEMENS

Item #: 46588930

Siemens 3RH21221BB40 IEC Control Relay, 24VDC, 2NO+2NC, Size S00, Screw Terminal

Item #: 46588930

NZD 95

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SIRIUS 3RH Control Relays are perfect for installations subject to variable voltage and high temperatures.

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What Stands Out

Versatile Configuration

This relay offers 2 normally open and 2 normally closed contacts, allowing for versatile control configurations in various automation applications, enhancing flexibility.

Compact Size

Designed in size S00, this compact control relay is ideal for space-constrained environments, ensuring maximum functionality while minimizing footprint.

Reliable Performance

Operates at 24VDC with high durability, providing dependable operation in demanding conditions, ensuring reduced downtime and increased productivity in automation systems.

Product Details

Who Should Buy?

Industrial Automation
Ideal for controlling machinery and industrial processes with reliable switching capabilities in demanding environments.
Electrical Engineers
Perfect for electrical engineers designing control circuits that require precise relay operation and versatility.
Control Panel Builders
Suitable for panel builders assembling control systems, thanks to screw terminals that simplify wiring and installation.

Home Automation
Not suitable for home automation applications that require wireless connectivity or more compact designs.

Product Description

Siemens 3RH21221BB40 IEC Control Relay, 24VDC, 2NO+2NC, Size S00, Screw Terminal

About This Item

Introducing the Siemens 3RH21221BB40 IEC Control Relay - the perfect solution for all your control relay needs. With its reliable performance and advanced features, this control relay is a must-have for any industrial application. Designed and manufactured by Siemens, a trusted name in the industry, this control relay is built to deliver excellent performance and durability. It is specifically designed for use in low voltage control circuits, making it ideal for a wide range of industrial applications.

The Siemens 3RH21221BB40 IEC Control Relay operates on a 24VDC power supply, ensuring energy efficiency and compatibility with most existing systems. Its compact Size S00 allows for easy installation even in tight spaces, making it a versatile choice for any setting. Featuring 2 Normally Open (NO) and 2 Normally Closed (NC) contacts, this control relay offers flexibility in circuit design and ensures reliable switching. The screw terminal connection allows for a secure and convenient connection, making it easy to install or replace as needed. Whether you need to control motors, lights, or other electrical devices, the Siemens 3RH21221BB40 IEC Control Relay is the perfect solution.

Its advanced features, durability, and trusted brand name make it a reliable choice for any industrial application. Upgrade your control circuit today with the Siemens 3RH21221BB40 IEC Control Relay. Experience the reliability and performance you can trust from Siemens. Don't settle for anything less when it comes to your control relay needs.

Order yours now and take your industrial applications to the next level.

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Product Buying Guide

The Siemens 3RH21221BB40 IEC Control Relay is designed to offer advanced control solutions for a wide range of applications. With its 24V DC IEC control contactor relay and global applicability through various approvals such as UL, CSA, IEC, CE, CCC, EAC, this product ensures reliable and safe operations. Learn more about its specifications, key features, usage scenarios, competitors, user reviews, price analysis, and buying considerations below. Continue Reading

Customer Questions & Answers

Question: How to Shop Siemens 3RH21221BB40 IEC Control Relay, 24VDC, Online From Ubuy?

Answer: It’s easy to shop Siemens 3RH21221BB40 IEC Control Relay, 24VDC, online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.
Question: Is Siemens 3RH21221BB40 IEC Control Relay, 24VDC, Available to Shop Online in New Zealand?

Answer: Yes, at Ubuy New Zealand this product is available for you to shop at a reasonable price. The Siemens 3RH21221BB40 IEC Control Relay, 24VDC, is not available locally but you can trust us with our express shipping services.
Question: How Long Does It Take to Get Product After Placing the Order?

Answer: The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

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Pros

High reliability
Compact size
Easy installation
Versatile configuration
Durable construction

Cons

Occasional terminals tight

Product Price History

Important information

Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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NZD 95

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Features & Benefits

Ideal for railway applications, rolling mills and more
Compatible with control supply voltages with battery buffer
Size S00, SIRIUS Modular Design
Auxiliary contacts 2 NO + 2 NC for better control
Screw terminals with finger-safe touch protection
Global applicability through various approvals such as UL, CSA, IEC, CE, CCC, EAC, etc.

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Siemens 3RH21221BB40 IEC Control Relay, 24VDC, 2NO+2NC, Size S00, Screw Terminal