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Siemens 3UA52 00-1B Thermal Overload Relay for Motor Protection

Name: Siemens 3UA52 00-1B
Brand: Siemens
SKU: 3UA52 00-1B
Availability: InStock

Siemens 3UA52 00-1B Thermal Overload Relay

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ManufacturerSiemens

Part number3UA52 00-1B

Current Setting Range 1.25-2A

Auxiliary Contacts 1 NO + 1 NC

Mounting Direct mount onto contactor/starter

Type Thermal Overload Relay

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Veteran-owned

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Adjustable current setting Direct mounting Thermal overload protection 1NO+1NC auxiliary contacts Reliable protection for small/medium motors

Product description

The Siemens 3UA52 00-1B is a thermal, time-delayed overload relay designed for direct mounting onto Siemens contactors and starters. This relay provides motor protection with an adjustable current setting range from 1.25 to 2 Amperes. It incorporates one normally open (NO) and one normally closed (NC) auxiliary contact for integrated control and signaling circuits.

This overload relay is essential for protecting small to medium-sized motors from damage caused by overloads, phase unbalance, or stalled conditions. It is commonly used in applications such as smaller pumps, fans, conveyor systems, and other machinery requiring reliable motor safeguarding within its specified current range.

Stanlo Automation, a veteran-owned business specializing in surplus industrial automation parts, offers the Siemens 3UA52 00-1B. We provide high-quality, cost-effective solutions to keep your operations running efficiently. Rely on Stanlo for your essential automation components and expert service.

Technical specifications

Current Setting Range	1.25-2A
Auxiliary Contacts	1 NO + 1 NC
Mounting	Direct mount onto contactor/starter
Type	Thermal Overload Relay

Common applications

Small motor protection

Pump control

Fan control

Conveyor systems

HVAC equipment

Compatible systems

Siemens 3RT series contactors Siemens 3RH series contactors

Also known as

Siemens 3UA52 00-1B overload relay 3UA52001B thermal relay Siemens 2A overload relay

Replaces / compatible with

The Siemens 3UA52 00-1B is a direct-fit replacement for older or failed overload units on compatible Siemens contactors, ensuring continued motor protection.

Technical note

Expert tip

Always verify the correct calibration of the 3UA52 00-1B relay against the motor's nameplate full load amps (FLA) for proper protection.

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Frequently asked questions

What is the purpose of the 1NO+1NC contacts on the Siemens 3UA52 00-1B overload relay?

The 1NO (Normally Open) and 1NC (Normally Closed) auxiliary contacts on the Siemens 3UA52 00-1B overload relay are used for external signaling and control. The NC contact can be wired into a control circuit to stop a motor or machine when an overload occurs, while the NO contact can be used for alarm indication.