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Siemens 3RN1012-1BB00 Thermistor Motor Protection Unit

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ManufacturerSiemens

Part number3RN1012-1BB00

Type Thermistor Motor Protection Unit

Evaluation Standard

Operation Manual/Auto/Remote

Contacts 2 CO

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Veteran-owned

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Thermistor motor protection Manual/Auto/Remote operation 2 Changeover contacts Wide voltage range (24V AC/DC) Compact design

Product description

The Siemens 3RN1012-1BB00 is a standard evaluation unit for thermistor motor protection. This unit is designed for manual/auto/remote operation and features 2 changeover (CO) contacts. It operates on a 24V AC/DC power supply, offering versatile integration into various control circuits.

This product is crucial for safeguarding electric motors against overloads and thermal damage by monitoring integrated PTC thermistors. It's commonly used in industrial machinery, pumps, fans, and conveyor systems where motor reliability is paramount.

Although this is a phased-out product (successor is 3RN2012-1BA30), Stanlo Automation, a veteran-owned surplus parts distributor, can still provide the Siemens 3RN1012-1BB00. Secure this essential motor protection component while supplies last.

Technical specifications

Type	Thermistor Motor Protection Unit
Evaluation	Standard
Operation	Manual/Auto/Remote
Contacts	2 CO
Voltage	24V AC/DC
Status	Phased-out product (Successor: 3RN2012-1BA30)

Common applications

Motor Protection

Industrial Machinery

Pumps

Fans

Conveyor Systems

HVAC Systems

Compatible systems

Siemens S7-200 Siemens S7-300 Various Industrial Control Panels

Also known as

Siemens Motor Protection Relay 3RN10121BB00 Siemens Thermal Overload Relay 24V AC/DC Motor Protector

Replaces / compatible with

This unit is a direct predecessor to the Siemens 3RN2012-1BA30 thermistor motor protection relay. It provides essential motor protection functions for various industrial applications.

Technical note

Expert tip

When using thermistors, ensure they are correctly connected to the designated terminals and that the trip class is appropriately set to match motor characteristics for optimal protection.

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Frequently asked questions

What are the key features of the Siemens 3RN1012-1BB00 motor protection unit?

The Siemens 3RN1012-1BB00 features standard evaluation for thermistor motor protection, supporting manual, auto, and remote operation modes. It includes 2 changeover (CO) contacts and operates on a versatile 24V AC/DC power supply.