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Siemens 3RU2126-4FB1 Thermal Overload Relay (34-40A)

Siemens 3RU2126-4FB1 Thermal Overload Relay, 34-40A, Size S0, Class 10.

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ManufacturerSiemens

Part number3RU2126-4FB1

Manufacturer Siemens

Part Number 3RU2126-4FB1

Type Thermal Overload Relay

Current Setting 34...40 A

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Motor Thermal Protection 34-40A Adjustable Range Size S0 Class 10 Protection Manual/Auto Reset Screw Terminals

Product description

The Siemens 3RU2126-4FB1 is a thermal overload relay designed for motor protection. It features a current setting range of 34 to 40 Amperes and is rated for Size S0 with a Class 10 tripping characteristic. This relay provides reliable thermal overload protection for electric motors, preventing damage due to overcurrent conditions.

This overload relay is crucial for applications involving motor control circuits, protecting motors in pumps, fans, compressors, and conveyor systems. It offers manual or automatic reset functionality and can be mounted as a stand-alone unit or directly onto a compatible contactor.

Stanlo Automation, a veteran-owned supplier of surplus industrial automation parts, carries the Siemens 3RU2126-4FB1. Ensure the longevity of your motors by sourcing high-quality protection devices from Stanlo.

Technical specifications

Manufacturer	Siemens
Part Number	3RU2126-4FB1
Type	Thermal Overload Relay
Current Setting	34...40 A
Size	S0
Tripping Class	Class 10
Mounting	Stand-alone Installation
Reset	Manual/Automatic

Common applications

Motor Control Panels

Pump Systems

Fan Applications

Conveyor Motors

Industrial Machinery

Compressor Protection

Compatible systems

Siemens Contactors (Size S0) Motor Control Circuits 3 Phase Motors

Also known as

Siemens 3RU Overload Relay 40A Thermal Overload

Replaces / compatible with

This overload relay replaces older Siemens 3RU series overload relays within the 34-40A range and is compatible with Siemens 3RT contactors of the corresponding size.

Technical note

Expert tip

Ensure the overload relay is correctly sized and coordinated with the motor's full load current and starting characteristics for optimal protection.

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Frequently asked questions

What is the adjustable current range and tripping class for the Siemens 3RU2126-4FB1 overload relay?

The Siemens 3RU2126-4FB1 thermal overload relay has an adjustable current setting range of 34 to 40 Amperes. It is designed with a Class 10 tripping characteristic, meaning it will trip within 10 seconds at 6 times the set current.