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Siemens 3RU2126-4NB0 SIRIUS Thermal Overload Relay - 23-28A

Siemens 3RU2126-4NB0 Thermal Overload Relay for motor protection.

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ManufacturerSiemens

Part number3RU2126-4NB0

Adjustable Current 23-28 A

Size S0

Class 10

Mounting Contactor

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CAGE: 9NK75

Thermal overload protection Phase failure sensitivity Manual or automatic reset Contactor mounting Class 10 tripping Screw terminals

Product description

The Siemens 3RU2126-4NB0 is a thermal overload relay engineered for robust motor protection. It features an adjustable current range of 23 to 28 Amps and adheres to Class 10 tripping standards, providing essential defense against overloads and phase imbalances. This unit is designed for direct mounting onto contactors, utilizing screw terminals for both main and auxiliary circuits, and offers both manual and automatic reset capabilities.

This overload relay is suitable for numerous industrial automation applications, including control panels, pump systems, and material handling machinery. Its integration with Siemens 3RT2 series contactors ensures efficient and reliable performance in demanding environments.

Stanlo Automation, a veteran-owned distributor, is your trusted source for the Siemens 3RU2126-4NB0. We pride ourselves on offering high-quality surplus parts at competitive prices, ensuring you get the components you need with prompt delivery.

Technical specifications

Adjustable Current	23-28 A
Size	S0
Class	10
Mounting	Contactor
Main Circuit Terminals	Screw
Auxiliary Circuit Terminals	Screw
Reset	Manual/Automatic
Max Rated Operation Voltage	690 V AC

Common applications

Industrial control panels

Pump systems

Material handling

Fan control

Compressor protection

Compatible systems

Siemens 3RT2 Size S0 Contactors

Also known as

Siemens SIRIUS 3RU2126-4NB0 3RU21264NB0 Motor overload relay S0

Replaces / compatible with

This overload relay is designed for direct mounting onto Siemens 3RT2 size S0 contactors.

Technical note

Expert tip

This relay provides phase loss sensitivity, a crucial feature for protecting three-phase motors from damage due to uneven voltage.

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Frequently asked questions

What type of reset function does the Siemens 3RU2126-4NB0 overload relay have?

The Siemens 3RU2126-4NB0 overload relay features both manual and automatic reset functions. This provides flexibility for different operational needs and fault recovery scenarios.