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3RH1921-1HA31

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Marvo Stock ID MV-1OAT
HS Code 85365080
SKU 3RH1921-1HA31
Warranty 12 months
Weight (lbs) 2.20
Length (inches) 11.81
Width (inches) 7.48
Height (inches) 5.91

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Specification & Description

Specification Description
Part Number 3RH1921-1HA31
Alternative Part Number 3RH19211HA31
Manufacturer Siemens
Description Auxiliary Switch Block, 3NO & 1NC, 230 V ac, 10 A
Short Description Auxiliary switch block, EN 50012 Screw terminal, for motor contactors
Commodity Code 853650
Ambient Temperature during Storage -55 … +80 °C
Ambient Temperature during Operation -25 … +60 °C
Mechanical Operating Cycles Typical 10,000,000
Electrical Operating Cycles Typical 200,000 at AC-15 / at 230 V
Insulation Voltage Rated value 690 V
Impulse Voltage Resistance Rated value 6 kV
Number of NC Contacts 1 (instantaneous switching)
Number of NO Contacts 3 (instantaneous switching)
Operating Current of Auxiliary Contacts 10 A at AC-12 (24 V and 230 V)
Mounting Type Snap-on mounting
Width 44 mm
Height 38 mm
Depth 51 mm
Electrical Connection Design Screw-type terminals
Connectable Conductor Cross-Section 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) for auxiliary contacts
Product Function Mirror contact to IEC 60947-4-1 (with 3RT1)
Certificates/ Approvals Compliant with international standards

The Siemens 3RH1921-1HA31 is a robust and reliable Auxiliary Switch Block designed to enhance the functionality of your motor contactors. This 4-pole switch block features 3 Normally Open (NO) and 1 Normally Closed (NC) contacts, providing versatile switching options for your industrial applications.

Engineered to DIN EN50012 standards, this switch block ensures high performance and durability. It operates efficiently within a temperature range of -25 to +60 degrees Celsius, making it suitable for various working environments.

The 3RH1921-1HA31 is equipped with screw-type terminals for auxiliary and control current circuits, allowing for secure and easy connections. It can handle a rated insulation voltage of 690V and has an impulse voltage resistance of 6kV, ensuring safe operation in high-voltage scenarios.

With a compact design of 44mm width, 38mm height, and 51mm depth, this switch block is easy to install and does not take up much space in your control panel. It's designed for snap-on mounting, making installation a breeze.

The Siemens 3RH1921-1HA31 Auxiliary Switch Block is a high-quality component that offers reliable and efficient operation, making it an excellent choice for your motor contactor applications.

Commonly Asked Questions

Is my order covered by a warranty?

Marvo provides a full 12-month warranty on all products, whatever the condition. For your peace of mind, all parts are ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. If you are unhappy with the part(s) you received and would like to request a return, you can do so by completing our quick and easy online form. Once we have received your Returns Request, a member of the team will be in touch to discuss this further with you. You can read more about our warranty policy here.

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What payment methods do you accept?

We accept card payments from all major credit, debit and Mastercard providers including Visa, American Express, Western Union, Paypal and bank transfers. Before you complete an order you will be prompted to input your payment details, at which point you can enter the relevant card information you wish to use for your transaction. If you are experiencing issues with your payment method then you can contact our team via email here. From there, you will be directed to the most relevant resource or person to help you complete your payment, get your order processed and ensure that your parts are on the way to your delivery address.

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Marvo is a highly credible supplier of industrial automation parts and components with dedicated hubs around the world offering industry-leading products and services. Marvo is committed to providing a quick, easy and reliable place to source your automation and control components. All purchases come as standard with a comprehensive 12-month return to base warranty meaning that, in just a few clicks, you can source critical parts more seamlessly than ever before. Click here to read an article on how Marvo is redefining convenience for automation and manufacturing professionals.

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Have steps been taken to ensure quality control?

Marvo takes pride in product quality and has put several measures in place to assure high levels of quality standards. For your peace of mind, all parts have been ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. Redefine convenience and secure priority delivery on all parts along with a comprehensive 12-month warranty. This is the smart new way to buy automation and control components.

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Frequently Asked Questions

What is the function of this Siemens Auxiliary Switch Block?

The Siemens 3RH1921-1HA31 is an auxiliary switch block designed for motor contactors. It is used to control the flow of electricity in a circuit, allowing for safe and efficient operation of motor contactors.

What are the technical specifications of this Auxiliary Switch Block?

This Siemens Auxiliary Switch Block operates at 230 V ac, 10 A. It features 3 Normally Open (NO) and 1 Normally Closed (NC) contacts. It also has an EN 50012 Screw terminal for secure connections.

What is the operating temperature range for this part?

The Siemens 3RH1921-1HA31 can operate effectively in a temperature range of -25 to +60 degrees Celsius. This makes it suitable for use in a variety of industrial environments.

What is the protection class of this Auxiliary Switch Block?

The Siemens 3RH1921-1HA31 has a protection class IP20 on the front. This means it is protected against solid objects larger than 12.5 mm but is not protected against liquids.

What is the installation type for this part?

The Siemens 3RH1921-1HA31 is designed for snap-on mounting. This makes it easy to install and replace when necessary.

What is the size of this Auxiliary Switch Block?

The dimensions of the Siemens 3RH1921-1HA31 are 44 mm in width, 38 mm in height, and 51 mm in depth.

What type of connection does this Auxiliary Switch Block use?

The Siemens 3RH1921-1HA31 uses screw-type terminals for auxiliary and control current circuits. This ensures a secure and reliable connection.

Does this Auxiliary Switch Block have any certifications or approvals?

Yes, the Siemens 3RH1921-1HA31 has a mirror contact product function to IEC 60947-4-1.

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Part conditions explained

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New unsealed: The product is in its original packaging, but the packaging has been opened or unsealed. It has never been used and should be in near pristine condition.

New sealed: The product is sealed in its original packaging. It has never been opened or used, ensuring that it's in an untouched state.

New unboxed: The product does not come in its original packaging, but it has never been used and is in great working condition.

Refurbished: The product has been previously used, but it has undergone a thorough refurbishment process to restore it to a like-new or functional condition. Any defects or issues have been addressed, making it suitable for reuse.

Used: The product has been previously owned and has been used. It may show signs of wear and tear but is still functional and operational. The condition may vary depending on the specific item and its usage history.

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