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Siemens 3UA5-900-2E Thermal Overload Relay for Single Unit Installation

Siemens 3UA5-900-2E thermal overload relay, 25-40A, single unit installation.

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ManufacturerSiemens

Part number3UA5-900-2E

Type Thermal Delayed Overload Relay

Setting Range 25-40A

Auxiliary Contacts 1NO+1NC

Mounting Single Unit Installation

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Adjustable thermal tripping Single unit installation Phase failure protection Integrated auxiliary contacts (1NO+1NC) Wide application range Reliable Siemens design

Product description

The Siemens 3UA5-900-2E is a thermal delayed overload relay designed for installation as a single unit, offering flexibility in control panel configurations. It features an adjustable setting range of 25 to 40 Amps, suitable for a wide array of motor sizes. This relay includes one normally open (NO) and one normally closed (NC) auxiliary contact for integration into control and alarm systems.

This overload relay is commonly used in industrial applications where space for direct contactor mounting is limited or where a separate protective device is preferred. It is essential for protecting motors from damage due to overloads, phase unbalance, and stalled rotor conditions across various machinery.

Stanlo Automation, a veteran-owned distributor of industrial automation surplus, provides the Siemens 3UA5-900-2E. We are dedicated to delivering reliable components and exceptional service to our customers. Source your Siemens overload relays and other automation parts from Stanlo Automation and ensure your systems are protected.

Technical specifications

Type	Thermal Delayed Overload Relay
Setting Range	25-40A
Auxiliary Contacts	1NO+1NC
Mounting	Single Unit Installation
Manufacturer	Siemens

Common applications

Motor control panels

Industrial machinery

HVAC systems

Pump stations

Fan assemblies

Standalone motor protection

Compatible systems

Various control panels and motor circuits requiring standalone overload protection

Also known as

Siemens 3UA5-900-2E relay 3UA5-900-2E motor protection Siemens 25-40A overload

Replaces / compatible with

This relay is designed for standalone installation and can be used in systems requiring overload protection in the 25-40A range. It offers an alternative to direct-mount relays when panel layout demands separate component placement.

Technical note

Expert tip

Ensure correct wiring to the motor circuit and control system. The separate mounting requires careful consideration of thermal dissipation and environmental factors.

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Frequently asked questions

What are the benefits of the single unit installation design of the Siemens 3UA5-900-2E overload relay?

The single unit installation design of the Siemens 3UA5-900-2E provides greater flexibility in control panel layout, allowing the relay to be mounted independently of a contactor. This is beneficial in applications where space is limited or a specific mounting arrangement is required.