# Siemens 3RN2011-1BW30 Thermistor Motor Protection Relay with Screw Terminals

**URL:** https://aio.lv/en/product--siemens-3rn20111bw30--1805580
**Data updated:** 2026-05-18 02:44 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** Siemens
**Manufacturer code:** 3RN20111BW30
**EAN:** 4047621006666
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 122.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 101.64 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rn20111bw30--1805580

## 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 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RN2011-1BW30 is a high-quality thermistor motor protection relay designed for reliable monitoring of motor temperatures. Featuring robust screw terminals and two auxiliary contacts, this device ensures precise thermal protection in industrial automation systems. It is engineered for long-term operational safety, preventing overheating in electric motors through integrated sensor technology.

## Long description

The Siemens 3RN2011-1BW30 thermistor motor protection relay is a precision-engineered device designed to monitor motor temperatures in industrial environments. By utilizing integrated sensor technology, this relay provides reliable thermal protection, effectively preventing motor damage caused by overheating. Its robust construction and reliable switching capabilities make it an essential component for maintaining operational safety in automated systems.
Advantages
This motor protection relay offers exceptional reliability through its advanced thermistor monitoring technology, which ensures accurate detection of temperature fluctuations. The inclusion of durable screw terminals facilitates secure and stable electrical connections, reducing the risk of maintenance issues. Furthermore, the device is equipped with two auxiliary contacts, providing versatile integration options for various control and signaling circuits within industrial automation setups.
Suitable for
Monitoring motor temperatures in industrial automation systems
Preventing overheating in electric motors
Applications requiring reliable thermal protection with auxiliary signaling
When it may not be suitable
This device is specifically designed for thermistor-based temperature monitoring and may not be suitable for applications requiring direct current measurement or alternative motor protection methods like electronic overload relays. It is not intended for use in environments that exceed its specified operating temperature or voltage ratings.
Key specifications
Monitoring type: Thermistor motor protection
Connection type: Screw terminals
Auxiliary contacts: 2
Function: Thermal motor monitoring
How to use
Installation should be performed by qualified personnel in accordance with local electrical standards. The relay is typically mounted on a standard DIN rail within a control cabinet. Connect the thermistor sensor leads to the designated input terminals and wire the auxiliary contacts into your motor control circuit. Ensure all screw terminals are tightened to the specified torque to maintain a secure connection before applying power to the system.
What to consider before purchase
Verify compatibility with your existing motor thermistor sensors
Ensure the control voltage matches your system requirements
Confirm that the number of auxiliary contacts meets your signaling needs
Usage recommendations
Regularly inspect the terminal connections for tightness and ensure the relay is kept free from dust and moisture to maintain optimal performance and longevity in industrial environments.

## FAQ

### How much does the Siemens 3RN2011-1BW30 Thermistor Motor Protection Relay cost, and is it available for purchase?

The price is 122.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 12 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, Installment. All transactions are 100% secure and encrypted.

### Can Siemens 3RN2011-1BW30 Thermistor Motor Protection Relay be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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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