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header-product Siemens SIRIUS 3RH1921-1CA01 Auxiliary Switch Block, 1 NC Contact, Front-Mounting
15.99 €

Siemens SIRIUS 3RH1921-1CA01 Auxiliary Switch Block, 1 NC Contact, Front-Mounting

Siemens SIRIUS 3RH1921-1CA01 Auxiliary Switch Block Photo 1
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Siemens SIRIUS 3RH1921-1CA01 Auxiliary Switch Block, 1 NC Contact, Front-Mounting

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Siemens SIRIUS 3RH1921-1CA01 Auxiliary Switch Block, 1 NC Contact, Front-Mounting

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Short description

The Siemens SIRIUS 3RH1921-1CA01 is a single-pole auxiliary switch block designed for front mounting. It features one normally closed (NC) contact and is compatible with SIRIUS contactors. This modular component is essential for expanding control circuit capabilities in industrial automation and electrical switching systems, ensuring reliable signal transmission and operational safety.
Available for order: 23 pcs.
Warranty: 2 Years
SKU: 1839364
free shipment

Cheapest delivery:

Venipak Locker LV

Pick-up points

Venipak Locker LV

Cost

1.89 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
14.07.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
17.07.2026 {{selectedOffer.courierDeliveryString}}
From 7.10 € (Weight: 8.01 kg)
Parcel couriers
Venipak Locker LV / Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Venipak Pickup LV / Latvijas Pasts nodaļa
17.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.89 €
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Product information

Description

The Siemens SIRIUS 3RH1921-1CA01 is a high-quality auxiliary switch block engineered for seamless integration with SIRIUS contactors. This single-pole component is designed for front-mounting, providing a reliable normally closed (NC) contact to expand the switching capabilities of your electrical control systems. It is built to meet the rigorous demands of industrial automation, ensuring precise signal transmission and consistent performance in various switching applications.

Advantages

This auxiliary switch block offers exceptional reliability and ease of installation due to its modular design. By allowing for quick front-mounting onto compatible contactors, it simplifies the process of upgrading or modifying control circuits without requiring extensive downtime. The robust construction ensures long-term operational safety and durability, making it an essential addition for maintaining efficient electrical switching systems in demanding industrial environments.

Suitable for

  • Industrial automation control panels
  • Motor control and protection systems
  • Electrical signal feedback loops
  • Expanding contactor switching capacity

When it may not be suitable

This component is specifically designed for use with compatible Siemens SIRIUS contactors and may not be physically or electrically compatible with contactors from other manufacturers or different product series. It is not intended for high-power switching applications, as it is strictly an auxiliary device for control circuits.

Key specifications

  • Contact configuration: 1 normally closed (NC)
  • Mounting type: Front-mounting
  • Compatibility: Siemens SIRIUS contactors
  • Pole count: Single-pole

How to use

To install the auxiliary switch block, ensure that the power supply to the contactor is completely disconnected. Align the switch block with the front-mounting interface of the compatible SIRIUS contactor and press firmly until it clicks into place. Once secured, verify the mechanical connection and proceed to wire the NC contact into your control circuit according to your system schematic. Always perform a functional test before returning the system to full operation.

What to consider before purchase

  • Verify compatibility with your existing contactor model
  • Ensure the NC contact configuration meets your control logic requirements
  • Confirm that the front-mounting space is available within your enclosure

Usage recommendations

Always ensure that the electrical load connected to the auxiliary contact does not exceed the rated specifications to prevent damage to the switch block and ensure the longevity of your control system.

Description

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Customer reviews

Customer questions

FAQ

How much does the Siemens SIRIUS 3RH1921-1CA01 Auxiliary Switch Block cost, and is it available for purchase?

The price is 15.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 23 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
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14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.