# Siemens SIRIUS 3RU2 Thermal Overload Relay 7-10 A

**URL:** https://aio.lv/en/product--siemens-3ru21161jb0--1797165
**Data updated:** 2026-05-18 02:44 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3RU21161JB0
**EAN:** 4011209781672
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 50.99 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 42.14 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3ru21161jb0--1797165

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.99 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Siemens SIRIUS 3RU2 thermal overload relay is designed for reliable protection of motors and electrical systems against overload and phase failure. With an adjustable current range of 7 to 10 A, this S00 size device ensures precise monitoring and safety in industrial automation applications. It features a robust design for long-term operational stability and is compatible with standard contactors for easy installation and integration into control circuits.

## Long description

The Siemens SIRIUS 3RU2 thermal overload relay is a high-performance protective device engineered to safeguard motors and electrical systems from the risks of thermal overload and phase failure. Designed for precision and reliability, this S00 size relay provides an adjustable current range of 7 to 10 A, making it an essential component for maintaining operational safety in industrial automation environments. Its robust construction ensures consistent performance under demanding conditions, while its compatibility with standard contactors facilitates seamless integration into existing control circuits.
Advantages
This thermal overload relay offers exceptional operational stability and long-term durability, which are critical for minimizing downtime in industrial processes. The device is built to withstand harsh environments, ensuring that motors are protected against excessive heat and electrical faults. Its compact S00 design allows for space-efficient mounting, while the adjustable current setting provides the flexibility needed to match specific motor requirements accurately. The integration process is straightforward, reducing installation time and complexity for maintenance teams.
Suitable for
Industrial motor protection
Control cabinet automation
HVAC system management
Conveyor belt control systems
Pump and compressor protection
When it may not be suitable
This device is not intended for applications requiring current ranges outside of the 7 to 10 A threshold. It is also not suitable for direct short-circuit protection, as it is designed specifically for thermal overload and phase failure monitoring.
Key specifications
Current setting range: 7 to 10 A
Size: S00
Protection type: Thermal overload and phase failure
Compatibility: Standard industrial contactors
How to use
The relay is designed to be mounted directly onto a compatible contactor or installed as a standalone unit using a mounting bracket. Once installed, the current setting should be adjusted using the dial on the front of the device to match the rated current of the motor being protected. After the settings are configured, the control circuit wiring is connected to the terminals. The device features a manual or automatic reset function, which can be configured based on the specific requirements of the application.
What to consider before purchase
Verify that the motor's rated current falls within the 7 to 10 A range.
Ensure the relay size S00 is compatible with your existing contactor model.
Check the environmental conditions of the installation site to ensure they meet the device's operational specifications.
Usage recommendations
Regularly inspect the relay for signs of wear and test the trip function periodically to ensure that the protection mechanism remains fully operational and responsive to potential faults.

## FAQ

### How much does the Siemens SIRIUS 3RU2 Thermal Overload Relay 7-10 A cost, and is it available for purchase?

The price is 50.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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. More information about warranty service: https://aio.lv/en/warranty

## Image

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