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Siemens 3RU2126-1GB0 Thermal Overload Relay - 4.5-6.3A

Siemens 3RU2126-1GB0 Thermal Overload Relay

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ManufacturerSiemens

Part number3RU2126-1GB0

Adjustable current range 4.5-6.3A

Trip Class 10

Size S0

Mounting Contactor mounting

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Thermal overload protection Phase loss sensitivity Manual/Automatic reset Direct mounting on S0 contactors Screw terminals Class 10 trip class

Product description

The Siemens 3RU2126-1GB0 is a robust thermal overload relay from the SIRIUS 3RU2 series, designed for reliable motor protection. It features an adjustable current range of 4.5-6.3A and a Class 10 trip rating, ensuring effective safeguarding against overloads and phase failures. This relay is engineered for direct mounting onto Siemens 3RT2 size S0 contactors. It utilizes screw terminals for main and auxiliary circuits and offers both manual and automatic reset functionalities, providing versatility for various industrial applications.

The 3RU2126-1GB0 is crucial for applications in industrial automation, such as motor control in manufacturing plants, material handling systems, and large pump installations. Its phase failure protection and precise overload sensing contribute to operational safety and equipment longevity.

Stanlo Automation, a veteran-owned distributor specializing in industrial automation surplus, offers the Siemens 3RU2126-1GB0. We are committed to providing high-quality parts with competitive pricing and efficient service.

Technical specifications

Adjustable current range	4.5-6.3A
Trip Class	10
Size	S0
Mounting	Contactor mounting
Main circuit connection	Screw
Auxiliary circuit connection	Screw
Reset function	Manual/Automatic
Poles	3
Rated operational voltage	690V AC

Common applications

Industrial automation

Pump systems

Material handling

Conveyor systems

Manufacturing machinery

HVAC systems

Compatible systems

Compatible with Siemens 3RT2 size S0 contactors (e.g., 3RT2023, 3RT2024, 3RT2025, 3RT2026, 3RT2027, 3RT2028).

Also known as

Siemens 3RU2126-1GB0 3RU21261GB0 SIRIUS 3RU2 overload relay

Replaces / compatible with

This relay is part of the Siemens SIRIUS 3RU2 series and is designed for direct mounting onto Siemens 3RT2 size S0 contactors. For older 3RU1126 overloads, a separate mounting bracket or contactor replacement may be needed.

Technical note

Expert tip

This relay includes one normally open (NO) and one normally closed (NC) auxiliary contact for signaling trip status or integration into control circuits.

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Frequently asked questions

Does the Siemens 3RU2126-1GB0 offer phase failure protection?

Yes, the Siemens 3RU2126-1GB0 thermal overload relay includes three-phase overload protection with phase loss sensitivity, ensuring comprehensive motor protection against common electrical faults.