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Siemens 3RU1126-1GB0 SIRIUS Overload Relay — 4.5-6.3A

Siemens 3RU1126-1GB0 overload relay for motor protection.

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ManufacturerSiemens

Part number3RU1126-1GB0

Current 4.5-6.3 A

Size S0

Class 10

Reset Manual/Automatic

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Veteran-owned

CAGE: 9NK75

Motor thermal overload protection Adjustable current setting Class 10 tripping Manual or automatic reset Contactor mounting option

Product description

The Siemens 3RU1126-1GB0 is a Size S0 overload relay designed for motor protection, with an adjustable current range of 4.5-6.3 A and a Class 10 tripping characteristic. It is equipped with screw terminals for main and auxiliary circuits and provides both manual and automatic reset capabilities.

This relay is intended for mounting on Siemens contactors or for stand-alone installations, offering robust protection for medium-sized motors in industrial environments. Applications include pumps, fans, and conveyor systems where reliable overload protection is critical.

Stanlo Automation, a veteran-owned surplus parts distributor, provides access to legacy and hard-to-find automation components. Secure your supply of essential parts like the Siemens 3RU1126-1GB0 through our extensive inventory.

Technical specifications

Current	4.5-6.3 A
Size	S0
Class	10
Reset	Manual/Automatic
Mounting	Contactor
Terminals	Screw

Common applications

Industrial motors

HVAC units

Material handling

Machine tools

Water treatment

Compatible systems

Siemens 3RT contactors

Also known as

3RU11261GB0 Siemens S0 overload relay 6.3A SIRIUS motor protection relay

Replaces / compatible with

This phased-out product's preferred successor is the SIRIUS 3RU2126-1GB0.

Technical note

Expert tip

The trip class of 10 indicates that the relay will trip within approximately 10 seconds at 7 times the set current.

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Frequently asked questions

Can the Siemens 3RU1126-1GB0 overload relay be used for stand-alone applications?

Yes, the Siemens 3RU1126-1GB0 overload relay can be used for stand-alone installations, although a separate mounting kit may be required. It is also designed for direct mounting onto compatible Siemens contactors.