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Siemens 3RU1126-1FB0 SIRIUS Overload Relay — 3.5-5A

Siemens 3RU1126-1FB0 overload relay for motor protection.

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ManufacturerSiemens

Part number3RU1126-1FB0

Current 3.5-5 A

Size S0

Class 10

Reset Manual/Automatic

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Motor overload protection Adjustable current setting Class 10 tripping Manual/Automatic reset option Contactor compatible

Product description

The Siemens 3RU1126-1FB0 is a Size S0 overload relay designed for motor protection, offering a current range of 3.5-5 A with a Class 10 tripping characteristic. It features screw terminals for both main and auxiliary circuits and supports manual or automatic reset.

This relay is suitable for direct mounting onto compatible Siemens contactors or for stand-alone installations. It provides essential protection for motors against overloads, phase imbalances, and undercurrent conditions in various industrial settings.

Stanlo Automation, a veteran-owned surplus distributor, specializes in providing access to discontinued and hard-to-find automation components like the Siemens 3RU1126-1FB0, ensuring operational continuity for your systems.

Technical specifications

Current	3.5-5 A
Size	S0
Class	10
Reset	Manual/Automatic
Mounting	Contactor
Terminals	Screw

Common applications

Industrial motors

Pump controls

HVAC systems

Conveyor drives

Machine tools

Compatible systems

Siemens 3RT contactors

Also known as

3RU11261FB0 Siemens S0 overload relay SIRIUS motor protection relay

Replaces / compatible with

This phased-out product's preferred successor is the SIRIUS 3RU2126-1FB0.

Technical note

Expert tip

For stand-alone applications, a separate mounting kit is typically required.

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Frequently asked questions

What type of reset is available on the Siemens 3RU1126-1FB0 overload relay?

The Siemens 3RU1126-1FB0 overload relay offers both manual and automatic reset functions. This allows users to select the most appropriate reset method based on the application's safety and operational requirements.