# Siemens 3RN2010-1CW30 Thermistor Motor Protection Relay

**URL:** https://aio.lv/en/product--siemens-3rn20101cw30--1801150
**Data updated:** 2026-05-18 02:44 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** Siemens
**Manufacturer code:** 3RN20101CW30
**EAN:** 4047621004433
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 77.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 64.04 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rn20101cw30--1801150

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RN2010-1CW30 is a reliable thermistor motor protection relay designed for monitoring temperature-sensitive components in industrial applications. This device ensures effective protection against overheating by evaluating PTC sensor signals. It is engineered for industrial automation systems, providing precise and safe motor operation through robust thermal monitoring and fault detection capabilities.

## Long description

The Siemens 3RN2010-1CW30 thermistor motor protection relay is a high-precision industrial device engineered to monitor temperature-sensitive components within electric motors. By continuously evaluating signals from PTC sensors, this relay provides a reliable defense against overheating, ensuring that motors operate within safe thermal limits. Its robust design makes it an essential component for maintaining the longevity and efficiency of industrial automation systems.
Advantages
This protection relay offers exceptional reliability in demanding industrial environments by providing accurate thermal monitoring. Its ability to detect overheating early helps prevent costly motor damage and unplanned downtime. The device is designed for seamless integration into existing control systems, offering a compact footprint and straightforward installation process that supports efficient maintenance and operational safety.
Suitable for
Industrial motor temperature monitoring
Automation systems requiring thermal protection
Protection of motors equipped with PTC sensors
Preventing overheating in heavy-duty machinery
This device may not be suitable for applications that do not utilize PTC thermistor sensors for temperature detection. It is also not intended for use in environments where the electrical load or environmental conditions exceed the specified technical ratings of the relay.
Key specifications
Device type: Thermistor motor protection relay
Sensor compatibility: PTC thermistors
Function: Thermal monitoring and fault detection
Application: Industrial automation
To use the Siemens 3RN2010-1CW30, connect the PTC sensor leads from the motor to the designated input terminals on the relay. Ensure the control circuit is correctly wired to the output contacts to allow the relay to interrupt power or trigger an alarm when an over-temperature condition is detected. Once installed, the device operates automatically, monitoring the resistance of the PTC sensors to determine the thermal state of the motor.
What to consider before purchase
Verify that your motor is equipped with compatible PTC thermistor sensors
Check the voltage and current requirements of your control circuit
Ensure the installation environment meets the specified operating conditions
Usage recommendations: Regularly test the functionality of the thermistor relay during scheduled maintenance intervals to ensure the protection circuit remains active and responsive to potential thermal faults.

## FAQ

### How much does the Siemens 3RN2010-1CW30 Thermistor Motor Protection Relay cost, and is it available for purchase?

The price is 77.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 13.07.2026 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 3RN2010-1CW30 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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