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Siemens 3RB3123-4PB0 Electronic Overload Relay, 1-4A, Size S0

Siemens 3RB3123-4PB0 Electronic Overload Relay

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ManufacturerSiemens

Part number3RB3123-4PB0

Current Range 1-4 A

Size S0

Trip Class 5E-30E

Mounting Contactor Mounting

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Veteran-owned

CAGE: 9NK75

Electronic Overload Protection Adjustable Current Setting Contactor Mountable Manual/Automatic Reset Phase-Failure Sensitivity Internal Ground Fault Detection

Product description

The Siemens 3RB3123-4PB0 is an electronic overload relay providing reliable motor protection for size S0 applications. It features an adjustable current range from 1 to 4 A and is designed for direct mounting onto compatible Siemens contactors. This relay offers crucial protection against overloads and phase failures, with selectable trip classes (5E to 30E) for precise motor matching.

This overload relay is suitable for a wide array of industrial applications, including motor control for conveyors, pumps, and machinery in manufacturing environments. Its electronic nature ensures consistent performance and accurate tripping, safeguarding motors from damage due to electrical faults.

Stanlo Automation, a veteran-owned business, offers the Siemens 3RB3123-4PB0 as part of our extensive inventory of surplus industrial automation components. We are committed to providing high-quality parts with exceptional service, ensuring your procurement process is efficient and cost-effective. Choose Stanlo Automation for your Siemens relay needs.

Technical specifications

Current Range	1-4 A
Size	S0
Trip Class	5E-30E
Mounting	Contactor Mounting
Reset	Manual-Automatic
Features	Phase-failure sensitivity, Internal ground fault detection

Common applications

Motor Control Panels

Manufacturing Equipment

Conveyor Systems

Pump Controls

Industrial Machinery

Compatible systems

Siemens 3RT contactors (Size S0) Motor control systems

Also known as

Siemens 3RB3123-4PB0 overload relay Siemens 1-4A Size S0 overload relay SIRIUS 3RB3123 electronic relay

Replaces / compatible with

This overload relay is designed for use with Siemens 3RT contactors of Size S0, providing an electronic upgrade for motor protection.

Technical note

Expert tip

Ensure the ambient temperature compensation is considered when setting the overload relay for accurate motor protection. This relay is designed for direct attachment to compatible 3RT contactors.

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Frequently asked questions

What is the trip class range for the Siemens 3RB3123-4PB0 overload relay?

The Siemens 3RB3123-4PB0 overload relay has an adjustable trip class range of 5E to 30E. This allows users to select the appropriate class based on the motor's starting characteristics and load requirements for optimal protection.