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Siemens 3RH1921-2HA31

Name: 3RH1921-2HA31
Brand: Siemens
SKU: 3RH1921-2HA31
Price: 42.61 GBP
Availability: InStock

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Marvo Stock ID MV-7C8H

HS Code 8536

SKU 3RH1921-2HA31

Condition New unboxed

Warranty 12 months

Weight (kg) 0.04

Length (mm) 51.00

Width (mm) 44.00

Height (mm) 38.00

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Specification & Description

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Specification & Description

Specification	Description
Part Number	3RH1921-2HA31
Alternative Part Number	3RH19212HA31
Manufacturer	Siemens
Product Type	Auxiliary Switch Block
Mounting Type	Snap-On Mounting
Number of Contacts	4 (3NO+1NC)
Connection Type	Cage Clamp Connection
Suitable For	Contactors for Switching Motors
Protection Class IP	IP20
Ambient Operating Temperature Range	-25 … +60 °C
Storage Temperature Range	-55 … +80 °C
Mechanical Operating Cycles	Typically 10,000,000
Electrical Operating Cycles at AC-15	Typically 200,000 at 230 V
Contact Reliability	1 faulty switching per 100 million (17 V, 1 mA)
Insulation Voltage	Rated value 690 V
Impulse Voltage Resistance	Rated value 6 kV
Operating Current at AC-12	10 A at 24 V and 230 V
Operating Current at AC-15	6 A at 24 V and 230 V, 3 A at 400 V, 1 A at 690 V
Operating Current at DC-13	6 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V
Dimensions (W x H x D)	44 x 38 x 51 mm
Electrical Connection	Spring-loaded terminals for auxiliary and control current circuit
Conductor Cross-Section	2x (0.5 ... 1.5 mm²) finely stranded with conductor end processing, 2x (0.5 ... 2.5 mm²) without
AWG Conductors	2x (20 ... 14) for auxiliary contacts
Product Function	Mirror contact to IEC 60947-4-1 with 3RT1, Not positively driven to IEC 60947-5-1
Commodity Code	85365080

The Siemens 3RH Series Auxiliary Switch is a compact and reliable snap-on mount switch block designed for seamless integration with contactors used in motor switching applications. This auxiliary switch block features a configuration of 3 normally open (NO) and 1 normally closed (NC) contacts, conforming to DIN EN50005 standards. With a cage clamp connection, it ensures a secure and maintenance-free electrical connection.

Crafted for durability, the switch block can withstand a wide range of ambient temperatures from -25°C to +60°C during operation, making it suitable for various industrial environments. It boasts an impressive mechanical operating cycle of typically 10 million operations and an electrical operating cycle of 200,000 at AC-15, at 230V.

The 3RH1921-2HA31 auxiliary switch block is rated for an insulation voltage of 690V with a pollution degree of 3 and has an impulse voltage resistance of 6kV, ensuring robust performance in demanding electrical conditions. Its auxiliary circuit can handle currents up to 10A at 24V, with varying ratings up to 600V.

With dimensions of 44mm in width, 38mm in height, and 51mm in depth, this auxiliary switch block is designed for space-saving installation while providing easy access for wiring through its spring-loaded terminals. It is compatible with finely stranded wires with or without conductor end processing, accommodating a range of conductor cross-sections.

The Siemens 3RH1921-2HA31 is also equipped with a mirror contact feature as per IEC 60947-4-1 standards when used with 3RT1 contactors, although it does not support positively driven operation to IEC 60947-5-1. This auxiliary switch block is a testament to Siemens' commitment to quality, offering a reliable solution for enhancing control circuit functionalities in industrial 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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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.

Is Marvo a credible parts supplier?

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.

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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Our service to you

Lightning-Fast Express Shipping: Receive your order in record time with our express shipping options, ensuring you minimize downtime and keep your projects on track.

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Rock-Solid Reliability at a Fraction of the Cost: Get pre-owned electronic parts that are fully tested for peak performance, saving you money without compromising on quality, backed by a comprehensive warranty.

Frequently Asked Questions

What is the function of this auxiliary switch block?

The auxiliary switch block is designed to be used with contactors for switching motors, providing additional switching functions such as signalling the contactor's position.

Can this auxiliary switch block be mounted easily?

Yes, it features snap-on mounting for easy and secure attachment to compatible devices.

What type of connections does this auxiliary switch block support?

It supports spring-loaded terminals for auxiliary and control current circuits, allowing for quick and reliable connections.

What is the ambient operating temperature range for this auxiliary switch block?

The ambient operating temperature range is from -25°C to +60°C, ensuring reliable operation in various environmental conditions.

How many mechanical operating cycles can this auxiliary switch block withstand?

It is designed for typically 10,000,000 mechanical operating cycles, indicating a high level of durability and longevity.

What is the insulation voltage rating for this auxiliary switch block?

The insulation voltage rating with degree of pollution 3 is 690V, providing a high level of electrical insulation.

Does this auxiliary switch block have a mirror contact function?

Yes, it includes a mirror contact function according to IEC 60947-4-1 when used with 3RT1 contactors.

What is the impulse voltage resistance of this auxiliary switch block?

The impulse voltage resistance is rated at 6kV, offering protection against voltage spikes.

What are the dimensions of this auxiliary switch block?

The dimensions are 44mm in width, 38mm in height, and 51mm in depth, making it compact and suitable for various applications.

How many auxiliary contacts does this switch block have?

It has 3 normally open (NO) contacts and 1 normally closed (NC) contact, providing flexibility in circuit design.

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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