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Siemens 3UA5000-1B Thermal Overload Relay for Contactor Mounting

Siemens 3UA5000-1B thermal overload relay, 1.25-2A, for contactor mounting.

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ManufacturerSiemens

Part number3UA5000-1B

Type Thermal Delayed Overload Relay

Setting Range 1.25-2A

Auxiliary Contacts 1NO+1NC

Mounting Onto Contactors

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Veteran-owned

CAGE: 9NK75

Adjustable thermal trip setting Direct mounting on contactors Suitable for small motors Integrated auxiliary contacts (1NO+1NC) Compact design Reliable Siemens performance

Product description

The Siemens 3UA5000-1B is a thermal delayed overload relay designed for direct mounting onto Siemens contactors. It features a low adjustable setting range of 1.25 to 2 Amps, making it suitable for protecting smaller motors. This relay includes one normally open (NO) and one normally closed (NC) auxiliary contact for essential control circuit functions and signaling.

This overload relay is a fundamental component for safeguarding small electric motors in a variety of industrial and commercial applications. Its direct mounting capability creates a compact and efficient motor starter assembly, commonly used in control panels for pumps, fans, and small machinery.

Stanlo Automation, a veteran-owned distributor specializing in industrial automation surplus, offers the Siemens 3UA5000-1B. We are committed to providing high-quality, reliable components to keep your operations running smoothly. Trust Stanlo Automation for your small motor protection needs and benefit from our dedicated service.

Technical specifications

Type	Thermal Delayed Overload Relay
Setting Range	1.25-2A
Auxiliary Contacts	1NO+1NC
Mounting	Onto Contactors
Manufacturer	Siemens

Common applications

Small motor protection

Industrial control panels

HVAC equipment

Pumps

Fans

Small machinery

Compatible systems

Siemens contactors

Also known as

Siemens 3UA5000-1B relay 3UA5000-1B motor starter Siemens 1.25-2A overload

Replaces / compatible with

Designed for direct mounting on Siemens contactors, this relay is ideal for replacing older versions within the 1.25-2A protection range. Ensure compatibility with your specific Siemens contactor model.

Technical note

Expert tip

Proper coordination with the circuit breaker or fuse upstream is crucial to ensure selective protection and prevent nuisance tripping under normal operating conditions.

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Frequently asked questions

What is the primary function of the Siemens 3UA5000-1B overload relay?

The primary function of the Siemens 3UA5000-1B is to protect small electric motors from damage caused by overloads, phase failures, or prolonged starting times. It achieves this through a thermal tripping mechanism that is adjustable within its specified current range.