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Siemens 3UA5400-2A Thermal Overload Relay

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ManufacturerSiemens

Part number3UA5400-2A

Type Thermal Delayed Overload Relay

Series 3UA54

Mounting Direct mount onto contactor

Current Setting Range 10-16A

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Veteran-owned

CAGE: 9NK75

Thermal overload protection Direct mounting capability Adjustable current setting Auxiliary contacts for signaling Robust industrial design

Product description

The Siemens 3UA5400-2A is a thermal delayed overload relay designed for direct attachment to Siemens contactors. It offers an adjustable current setting range from 10A to 16A and is equipped with one normally open (NO) and one normally closed (NC) auxiliary contact.

This relay is essential for safeguarding industrial motors from thermal overloads and phase unbalance. It is widely applied in manufacturing, material handling, and building automation systems where reliable motor protection is paramount.

Stanlo Automation, a veteran-owned business specializing in surplus industrial automation parts, offers the Siemens 3UA5400-2A. We are committed to providing cost-effective and reliable solutions for your automation and MRO needs.

Technical specifications

Type	Thermal Delayed Overload Relay
Series	3UA54
Mounting	Direct mount onto contactor
Current Setting Range	10-16A
Auxiliary Contacts	1 NO + 1 NC

Common applications

Motor Protection

Manufacturing

Material Handling

Building Automation

Industrial Machinery

Processing Plants

Compatible systems

Siemens 3RT contactors Siemens Sirius line

Also known as

Siemens 3UA54 10-16A Overload 3UA54002A Relay

Replaces / compatible with

Designed to work with compatible Siemens 3RT contactors. Replaces older overload protection devices within the 3UA54 series.

Technical note

Expert tip

This relay features manual or automatic reset options, selectable via a switch on the front.

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Frequently asked questions

What is the function of the 1NO+1NC contacts on the Siemens 3UA5400-2A?

The one normally open (NO) and one normally closed (NC) auxiliary contacts on the Siemens 3UA5400-2A are used for signaling. The NC contact is typically wired in series with the contactor coil to trip the motor, while the NO contact can be used for alarm indication.