Siemens SIRIUS 3RU2 Thermal Overload Relay 1NO + 1NC, 14 → 20 A F.L.C, 20 A Contact Rating, 7.5 kW, 3P, SIRIUS

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MYR367.63

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RS Stock No.:
706-1664
Distrelec Article No.:
136-23-078
Mfr. Part No.:
3RU2126-4BB0
Manufacturer:
Siemens
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Brand

Siemens

FLC Motor Rating

14 → 20 A

Contact Current Rating

20 A

Range

SIRIUS

Pole Configuration

3P

Series

SIRIUS 3RU2

Mounting Style

Direct Contactor

Power Rating

7.5 kW

Normal State Configuration

NO/NC

Terminal Type

Screw

Reset Method

Automatic, Manual

Width

45mm

Number Of Auxiliary Contacts

2

Depth

85mm

Length

87mm

Maximum Operating Temperature

+70°C

Minimum Operating Temperature

-40°C

Operating Temperature Range

-40 → +70 °C

Contact Voltage Rating

690 V ac

COO (Country of Origin):
DE

Siemens SIRIUS 3RU2 Series Thermal Overload Relay, 20A Contact Current Rating, 7.5kW Power Rating - 3RU2126-4BB0


This thermal overload relay plays a vital role in protecting electrical motors, specifically designed for those operating within a current range of 14 to 20 A. Featuring both automatic and manual reset functions, it helps prevent damage caused by overload situations. Its durable design allows for easy installation directly onto contactors, making it suitable for various automation and electrical machinery applications.

Features & Benefits


• Provides continuous protection for 3-phase motors
• Automatic reset feature enhances operational convenience
• Integrated auxiliary contacts for additional functionality
• Compact dimensions support space-efficient installations

Applications


• Applicable with industrial machinery to ensure operational safety
• Can be integrated into commercial electrical systems
• Commonly used in manufacturing environments for motor protection

What is the installation process for this device?


The device can be installed directly on contactors using screw terminals, ensuring a straightforward setup.

How does the automatic reset feature work?


Upon a fault occurrence, the device disconnects the motor and automatically reconnects once the fault is resolved.

Is this suitable for high current applications?


Yes, it is rated for safe operation with currents up to 20A.

Can it operate in high-temperature environments?


Yes, it performs well within a temperature range of -40 to +70°C.


Siemens Sirius Range Contactor & Control Relays

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