# Siemens 3RN2011-1BA30 Thermistor Motor Protection Relay

**URL:** https://aio.lv/en/product--siemens-3rn20111ba30--1801160
**Data updated:** 2026-05-18 02:44 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3RN20111BA30
**EAN:** 4047621006680
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 116.49 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 96.27 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rn20111ba30--1801160

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RN2011-1BA30 is a reliable thermistor motor protection relay designed for monitoring temperature in industrial motors. It provides precise protection against overheating by evaluating signals from PTC sensors. This compact device ensures operational safety and prevents motor damage in various automation and electrical control applications.

## Long description

The Siemens 3RN2011-1BA30 thermistor motor protection relay is a high-quality industrial component engineered to monitor the temperature of electric motors effectively. By continuously evaluating signals from integrated PTC sensors, this device detects overheating conditions in real-time, allowing for immediate intervention to prevent thermal damage to motor windings. Its robust design and reliable performance make it an essential element in modern industrial automation and electrical control systems, ensuring long-term operational safety and equipment longevity.
Advantages
This protection relay offers a highly reliable method for safeguarding motors against thermal overload, which is often caused by heavy mechanical loads, frequent switching, or inadequate cooling. The device is designed for seamless integration into existing control cabinets, featuring a compact footprint that saves valuable space. Its precise sensor evaluation ensures that the motor is protected under various operating conditions, minimizing downtime and reducing maintenance costs associated with motor repairs or replacements.
Suitable for
Industrial motor temperature monitoring
Protection of motors in automation systems
Electrical control panels requiring thermal safety
Applications using PTC thermistor sensors
This relay may not be suitable for applications that do not utilize PTC thermistor sensors, as it is specifically designed to interpret these signals. It is also not intended for direct motor control or as a substitute for standard circuit breakers or overload relays that monitor current rather than temperature.
Key specifications
Device type: Thermistor motor protection relay
Sensor compatibility: PTC thermistors
Mounting type: DIN rail
Operational safety: Overheating protection
Application: Industrial motor control
To use the device, mount it onto a standard DIN rail within your control cabinet and connect the PTC sensor leads from the motor to the designated input terminals. Ensure that the control circuit is wired correctly to the relay output contacts, which will trigger a shutdown or alarm signal when the threshold temperature is exceeded. Once installed, the device operates automatically, continuously monitoring the resistance of the PTC sensors to detect potential thermal hazards.
What to consider before purchase
Verify that your motor is equipped with compatible PTC thermistor sensors
Check the available space in your control cabinet for DIN rail mounting
Ensure the control voltage matches your system requirements
Confirm the relay's compatibility with your existing safety circuit architecture
For optimal performance and safety, ensure that all electrical connections are tightened to the manufacturer's specifications and that the PTC sensor wiring is shielded if installed in environments with high electromagnetic interference.

## FAQ

### How much does the Siemens 3RN2011-1BA30 Thermistor Motor Protection Relay cost, and is it available for purchase?

The price is 116.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 21 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 09.07.2026 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 3RN2011-1BA30 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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