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Siemens 3RN2010-1CA30 Thermistor Motor Protection Relay - 1 NO/NC Contact

Siemens 3RN2010-1CA30 Thermistor Motor Protection Relay

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ManufacturerSiemens

Part number3RN2010-1CA30

Enclosure 17.5 mm

Terminals Screw

Contacts 1 NO, 1 NC

Supply Voltage (Us) 24 V AC/DC

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Compact 17.5mm enclosure Screw terminals 1 NO + 1 NC contacts Auto-reset function Dual LED indication Fixed 24V AC/DC voltage

Product description

The Siemens 3RN2010-1CA30 is a compact thermistor motor protection relay featuring a 17.5 mm enclosure and screw terminals. It provides one normally open (NO) and one normally closed (NC) contact, offering flexibility in control circuit integration. This model operates at a fixed supply voltage of 24 V AC/DC and includes an auto-reset function. The unit is suitable for use with bimetallic switches and is equipped with two LEDs for ready and tripped status indication.

This relay is designed for effective motor temperature monitoring to prevent damage from overheating. It is commonly applied in industrial control panels, machinery, and applications where precise temperature control is necessary for operational integrity.

As a veteran-owned surplus parts distributor, Stanlo Automation provides the Siemens 3RN2010-1CA30. We are committed to delivering reliable industrial automation components and ensuring customer satisfaction through competitive pricing and dependable service.

Technical specifications

Enclosure	17.5 mm
Terminals	Screw
Contacts	1 NO, 1 NC
Supply Voltage (Us)	24 V AC/DC
Reset	Auto RESET
Indicators	2 LEDs (Ready/Tripped)
Compatibility	Bimetallic switches

Common applications

Motor protection

Control panels

Industrial machinery

Automation

Temperature monitoring

Compatible systems

Bimetallic switches PTC sensors

Also known as

3RN2010-1CA30 Siemens Relay Siemens Motor Temp Monitor

Replaces / compatible with

This relay is designed to protect motors by monitoring winding temperatures and can replace older or similar thermistor protection relays.

Technical note

Expert tip

The direct measurement of motor winding temperature via PTC sensors ensures reliable protection even under abnormal operating conditions.

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Frequently asked questions

What type of contacts does the Siemens 3RN2010-1CA30 offer?

The Siemens 3RN2010-1CA30 thermistor motor protection relay is equipped with one normally open (NO) and one normally closed (NC) contact. This configuration provides flexibility for integrating into various control and signaling circuits.