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Siemens 3RN2010-1BA30 Thermistor Motor Protection Relay

Siemens 3RN2010-1BA30 Thermistor Motor Protection Relay, 24V AC/DC, Auto RESET.

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ManufacturerSiemens

Part number3RN2010-1BA30

Type Thermistor Motor Protection Relay

Evaluation Unit Standard

Supply Voltage 24 V AC/DC

Output Contacts 2 Changeover Contacts (DPDT)

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Thermistor motor protection Auto RESET function 2 Changeover contacts 24V AC/DC supply Status LEDs Electrical isolation

Product description

The Siemens 3RN2010-1BA30 is a standard evaluation unit for thermistor motor protection. It features a compact 22.5 mm enclosure and utilizes screw terminals for electrical connections. Operating on a supply voltage (Us) of 24 V AC/DC, this relay is equipped with 2 changeover contacts. It supports auto-reset functionality and includes two LEDs for status indication (ready/tripped). The unit provides electrical isolation for enhanced safety.

This motor protection relay is designed to protect electric motors from thermal overload by monitoring the temperature via connected thermistors. It is suitable for a wide range of motor applications in industries such as manufacturing, pumps, fans, and compressors, where reliable motor protection is critical to prevent damage and downtime.

Stanlo Automation, a veteran-owned distributor of surplus industrial parts, offers the Siemens 3RN2010-1BA30. Secure this essential motor protection component from Stanlo and ensure the longevity and reliability of your motor systems.

Technical specifications

Type	Thermistor Motor Protection Relay
Evaluation Unit	Standard
Supply Voltage	24 V AC/DC
Output Contacts	2 Changeover Contacts (DPDT)
Reset	Auto RESET
Indication	2 LEDs (ready/tripped)
Enclosure Width	22.5 mm
Terminals	Screw terminal
Features	Electrical isolation, suitable for bimetallic switch

Common applications

Motor protection

Industrial machinery

Pump control

Fan control

Compressor control

Manufacturing plants

Compatible systems

PTC Thermistors (e.g., KTY series)

Also known as

Siemens 3RN2010 Motor Relay 3RN2010-1BA30 Thermistor Monitor

Replaces / compatible with

This relay is designed to work with thermistor temperature sensors (PTC) commonly found in electric motors for thermal overload protection.

Technical note

Expert tip

Ensure the thermistor type and resistance values connected are within the specifications of this evaluation unit for accurate motor temperature monitoring.

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Frequently asked questions

What type of reset does the Siemens 3RN2010-1BA30 offer?

The Siemens 3RN2010-1BA30 features an auto-reset function. This means that once the motor cools down and the fault condition is cleared, the relay will automatically reset and allow the motor to restart without manual intervention.