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Siemens 3RU1126-4BB1 SIRIUS Overload Relay — 14-20A Stand-alone

Siemens 3RU1126-4BB1 stand-alone overload relay for motor protection.

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ManufacturerSiemens

Part number3RU1126-4BB1

Current 14-20 A

Size S0

Class 10

Reset Manual/Automatic

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Stand-alone installation Motor overload protection Adjustable current setting Class 10 trip class Manual/Automatic reset

Product description

The Siemens 3RU1126-4BB1 is a Size S0 overload relay designed for stand-alone motor protection, with an adjustable current range of 14-20 A and a Class 10 tripping characteristic. It features screw terminals for main and auxiliary circuits and supports manual or automatic reset.

This version is specifically designed for stand-alone installation, offering flexible mounting options for motor protection where direct contactor mounting is not feasible. It is ideal for various industrial applications requiring reliable motor safeguarding.

Stanlo Automation, a veteran-owned surplus distributor, provides access to discontinued and critical automation components. Find and purchase parts like the Siemens 3RU1126-4BB1 with confidence, knowing you're sourcing from a trusted supplier.

Technical specifications

Current	14-20 A
Size	S0
Class	10
Reset	Manual/Automatic
Mounting	Stand-alone
Terminals	Screw

Common applications

Industrial motors

Control panels

Machine building

Remote motor protection

HVAC systems

Compatible systems

Various motor control systems

Also known as

3RU11264BB1 Siemens S0 overload relay stand alone SIRIUS 3RU1126 stand alone

Replaces / compatible with

This phased-out product's preferred successor is the SIRIUS 3RU2126-4BB1, designed for similar stand-alone applications.

Technical note

Expert tip

When used in a stand-alone configuration, ensure adequate ventilation around the relay to maintain its thermal performance.

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Frequently asked questions

What makes the Siemens 3RU1126-4BB1 suitable for stand-alone installation?

The Siemens 3RU1126-4BB1 is designed with features that allow it to be mounted independently of a contactor, often requiring a separate mounting plate or kit. This provides flexibility for motor protection in control panels where direct integration isn't possible.