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Siemens 3RU2126-4PB0 SIRIUS Thermal Overload Relay - 30-36A

Siemens 3RU2126-4PB0 Thermal Overload Relay for motor protection.

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ManufacturerSiemens

Part number3RU2126-4PB0

Adjustable Current 30-36 A

Size S0

Class 10

Mounting Contactor

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

Product description

The Siemens 3RU2126-4PB0 is a high-performance thermal overload relay designed to protect motors from thermal stresses. It offers an adjustable current range of 30 to 36 Amps and operates with Class 10 tripping characteristics, safeguarding against overloads and phase failures. This model is engineered for direct mounting on contactors and features screw terminals for both main and auxiliary circuits, with options for manual or automatic reset.

This relay is widely utilized in industrial applications such as motor control centers, pump systems, and material handling equipment, providing reliable motor protection. Its compatibility with Siemens 3RT2 series contactors ensures seamless integration into existing control systems.

Stanlo Automation, a veteran-owned supplier of surplus industrial automation parts, offers the Siemens 3RU2126-4PB0. We are dedicated to providing quality products and exceptional service to meet your operational needs.

Technical specifications

Adjustable Current	30-36 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

Motor control centers

Pump systems

Material handling

Fan control

Compressor protection

Compatible systems

Siemens 3RT2 Size S0 Contactors

Also known as

Siemens SIRIUS 3RU2126-4PB0 3RU21264PB0 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 features a test trip function and a stop button for safe maintenance and troubleshooting procedures.

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Frequently asked questions

What is the maximum rated power for a motor protected by the Siemens 3RU2126-4PB0 overload relay at 400V?

The Siemens 3RU2126-4PB0 overload relay is rated for a maximum active power of 18.5kW at 400V AC. This specification helps in selecting the appropriate relay for a given motor size.