# Siemens 3RN2000-2AA30 Thermistor Motor Protection Relay, 17.5 mm, Spring-Loaded Terminals, 1 CO Contact, AC/DC

**URL:** https://aio.lv/en/product--siemens-3rn20002aa30--1806506
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3RN20002AA30
**EAN:** 4047621004396
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 69.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 57.84 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rn20002aa30--1806506

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RN2000-2AA30 is a compact thermistor motor protection relay designed for reliable temperature monitoring of electric motors. Featuring a 17.5 mm housing and spring-loaded terminals, it ensures easy installation and secure connections. Equipped with one changeover contact, this device operates on AC/DC voltage, providing essential protection against overheating in industrial automation and motor control applications.

## Long description

The Siemens 3RN2000-2AA30 thermistor motor protection relay is a precision-engineered device designed to provide reliable thermal monitoring for electric motors. Housed in a compact 17.5 mm enclosure, this relay is optimized for space-saving integration into control cabinets. It utilizes advanced thermistor technology to detect overheating, ensuring that motors are protected from thermal damage during operation. With its versatile AC/DC power supply compatibility and robust spring-loaded terminals, it offers a dependable solution for maintaining the longevity and safety of industrial motor systems.
Advantages
This motor protection relay stands out due to its compact design, which allows for high-density mounting in modern control panels. The inclusion of spring-loaded terminals significantly reduces installation time and ensures a vibration-resistant connection, which is critical in industrial environments. By monitoring the temperature directly via thermistors, the device provides a more accurate assessment of the motor's thermal state compared to traditional current-based protection methods. Its universal AC/DC voltage range further enhances its flexibility, allowing it to be used in a wide variety of electrical configurations without the need for multiple device variants.
Suitable for
Industrial automation systems
Motor control centers
HVAC equipment and pump systems
Conveyor belt drives
Machinery requiring continuous thermal monitoring
When it may not be suitable
This device is specifically designed for use with PTC thermistor sensors embedded in motor windings. It is not suitable for applications that require direct current monitoring or overload protection based on current measurement alone. Furthermore, it should not be used in environments that exceed the specified operating temperature range or in hazardous areas without appropriate protective enclosures.
Key specifications
Width: 17.5 mm
Connection type: Spring-loaded terminals
Output: 1 changeover (CO) contact
Supply voltage: AC/DC
Function: Thermistor motor protection
How to use
Installation should be performed by qualified personnel in accordance with local electrical regulations. The relay is designed for mounting on a standard 35 mm DIN rail. Connect the PTC thermistor sensor leads to the designated input terminals on the device. Ensure that the control circuit is wired to the changeover contact to trigger the motor shutdown or alarm signal when an over-temperature condition is detected. Verify that the supply voltage matches the specifications before energizing the unit.
What to consider before purchase
Ensure your motor is equipped with compatible PTC thermistor sensors.
Check the available space on your DIN rail to accommodate the 17.5 mm width.
Verify that the control voltage matches your existing system requirements.
Confirm that the spring-loaded terminal type is compatible with your wiring standards.
Usage recommendations: Regularly test the functionality of the relay during scheduled maintenance intervals to ensure the motor protection circuit remains operational and that the thermistor sensors are correctly detecting temperature changes.

## FAQ

### How much does the Siemens 3RN2000-2AA30 Thermistor Motor Protection Relay cost, and is it available for purchase?

The price is 69.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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 03.07.2026 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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