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Siemens 3RU2126-4BB0 Thermal Overload Relay - 14-20A, Size S0

Siemens 3RU2126-4BB0 Thermal Overload Relay, 14-20A, for motor protection.

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ManufacturerSiemens

Part number3RU2126-4BB0

Current Range 14-20 A

Size S0

Class 10

Reset Manual/Automatic

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Thermal overload protection Class 10 tripping Manual or automatic reset Contactor mounting Screw terminals

Product description

The Siemens 3RU2126-4BB0 is a thermal overload relay engineered for effective motor protection. It is designed to operate within a current range of 14-20A and is classified as a Size S0 device with Class 10 tripping characteristics. This model features screw terminals for both main and auxiliary circuits and offers both manual and automatic reset capabilities.

This overload relay is essential for safeguarding electric motors in a wide array of industrial settings, including manufacturing plants, material handling systems, and HVAC applications. Its reliable performance ensures extended motor life and prevents costly damage.

Stanlo Automation, a veteran-owned supplier of surplus industrial automation parts, offers the Siemens 3RU2126-4BB0. We are committed to providing high-quality components with fast delivery to keep your operations running smoothly.

Technical specifications

Current Range	14-20 A
Size	S0
Class	10
Reset	Manual/Automatic
Main Circuit Terminals	Screw
Auxiliary Circuit Terminals	Screw

Common applications

Motor Control

Water Treatment

HVAC Systems

Material Handling

Food Processing

Automation

Compatible systems

Siemens 3RT2 Series Contactors Siemens 3RT1 Series Contactors

Also known as

3RU21264BB0 Siemens S0 overload relay 14-20A 3RU2 Series

Replaces / compatible with

This overload relay is designed to be compatible with Siemens contactors and can replace other Siemens overload relays with similar specifications. Consult datasheets for exact compatibility.

Technical note

Expert tip

When mounting on a contactor, ensure the overload relay is securely attached to prevent vibration-induced issues and maintain electrical integrity.

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Frequently asked questions

Can the Siemens 3RU2126-4BB0 be used for direct on-line motor starting?

Yes, the Siemens 3RU2126-4BB0 is designed for direct on-line motor starting and is used in conjunction with a contactor to provide comprehensive motor protection against overloads and phase failures.