Siemens Thermistor motor protection relay, screw, 1NO+1NC Part number 3RN2010-1CA30

Thermistor motor protection relay compact evaluation unit

The thermistor motor protection relay compact evaluation unit is designed for protecting motors against overheating through direct temperature measurement.

Technical details:

• Enclosure: 17.5 mm
• Terminal type: screw terminal
• Contacts: 1 NO contact, 1 NC
• Us: 24 V AC/DC
• Automatic RESET
• Suitable for bimetallic switch
• 2 LEDs (ready/tripped)
• Electrical separation
• Direct measurement of motor winding temperature
• Climate-resistant, safe to touch
• Available as monostable or bistable evaluation unit
• ATEX approval: available with and without
• Sensor circuits: one or two
• RESET options: auto RESET, manual RESET, remote RESET
• Terminal options: screw-type or spring-loaded (push-in)
• Width options: 17.5 mm or 22.5 mm
• Mounting: TH35 DIN rail or screw-on fastening with adapter (accessory)
• Contacts: hard gold plated
• Accessories: standardized, detachable terminals, push-in lugs, coding pins

Customer benefits:

• Protects motors even under abnormal conditions such as heavy starting, braking mode, frequent switching or insufficient cooling, eliminating the need for over-dimensioning of the motor.
• No device parameter setting required due to the use of PTC sensors or bimetallic switches.
• Fast error diagnostics enabled by LEDs.
• Worldwide usability thanks to wide voltage range and international certifications.
• Simplified selection and storage with standardized accessories for all device versions.
• Replaces the proven 3RN1 series.
• SIRIUS relays offer a range for every application.