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Siemens 3RB2026-1PB0 Class 10 Solid-State Overload Relay - 1-4A

Siemens 3RB2026-1PB0 Class 10 solid-state overload relay, 1-4A.

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ManufacturerSiemens

Part number3RB2026-1NB0

Current Range 1-4 A

Class 10

Mounting Contactor Mounting (Size S0)

Main Circuit Screw Terminal

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3-Phase Motor Protection Class 10 Tripping Manual/Automatic Reset Screw Terminals Direct Contactor Mounting Phase Loss Protection

Product description

The Siemens 3RB2026-1PB0 is a solid-state overload relay designed for reliable protection of three-phase motors. It offers an adjustable current range of 1 to 4 Amps and adheres to Class 10 tripping standards, ensuring effective defense against thermal overloads, phase unbalance, and phase failure.

This overload relay is intended for direct mounting onto Siemens size S0 contactors (e.g., 3RT1023, 3RT1024, 3RT1025, 3RT1026). It includes manual and automatic reset capabilities and comes equipped with standard auxiliary contacts (1 NO + 1 NC) for signaling and control applications. Screw terminals are utilized for all connections.

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Technical specifications

Current Range	1-4 A
Class	10
Mounting	Contactor Mounting (Size S0)
Main Circuit	Screw Terminal
Aux. Circuit	Screw Terminal
Reset	Manual/Automatic
Auxiliary Contacts	1 NO + 1 NC
Voltage	690 V

Common applications

Motor Control

Industrial Automation

Small to Medium Motors

Pumps

Fans

HVAC

Compatible systems

Designed for direct mounting on Siemens Size S0 contactors (e.g., 3RT1023, 3RT1024, 3RT1025, 3RT1026).

Also known as

Siemens 3RB2026-1PB0 Sirius Overload Relay 1-4A Overload Relay

Replaces / compatible with

This product is phased out. The preferred successor is the Siemens SIRIUS 3RB3026-1PB0.

Technical note

Expert tip

This relay is designed for direct mounting on specific Siemens size S0 contactors, offering a compact and reliable motor protection solution.

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Frequently asked questions

What is the appropriate motor size for the Siemens 3RB2026-1PB0 overload relay?

The Siemens 3RB2026-1PB0 overload relay is suitable for motors with full load currents ranging from 1 to 4 Amps. Its Class 10 rating ensures protection against overloads and phase failures for these motor sizes.