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Siemens 3RB2026-2SB0 Class 20 Solid-State Overload Relay - 3-12A

Siemens 3RB2026-2SB0 Class 20 solid-state overload relay, 3-12A.

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ManufacturerSiemens

Part number3RB2026-1SB0

Current Range 3-12 A

Class 20

Mounting Contactor Mounting (Size S0)

Main Circuit Screw Terminal

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3-Phase Motor Protection Class 20 Tripping Manual/Automatic Reset Screw Terminals Direct Contactor Mounting Phase Loss Protection

Product description

The Siemens 3RB2026-2SB0 is a solid-state overload relay engineered for reliable protection of three-phase motors. It offers an adjustable current range from 3 to 12 Amps and features a Class 20 tripping characteristic, suitable for motors with higher starting torque or longer acceleration times.

This overload relay is designed for direct mounting onto Siemens size S0 contactors (e.g., 3RT1023, 3RT1024, 3RT1025, 3RT1026). It provides manual and automatic reset options and includes standard auxiliary contacts (1 NO + 1 NC) for control and signaling. Screw terminals are used for all connections.

Stanlo Automation, your reliable veteran-owned source for industrial surplus, offers the Siemens 3RB2026-2SB0. We are dedicated to providing the essential parts you need to keep your operations running efficiently. Trust us for quality components and exceptional customer service.

Technical specifications

Current Range	3-12 A
Class	20
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

Medium Motors

Pumps

Compressors

HVAC

Compatible systems

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

Also known as

Siemens 3RB2026-2SB0 Sirius Overload Relay 3-12A Class 20 Relay

Replaces / compatible with

This product is phased out. The preferred successor is the Siemens SIRIUS 3RB3026-2SB0.

Technical note

Expert tip

The Class 20 rating is appropriate for motors with higher starting current or longer acceleration times, ensuring reliable protection against overloads.

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Frequently asked questions

What is the tripping class of the Siemens 3RB2026-2SB0 overload relay?

The Siemens 3RB2026-2SB0 overload relay has a tripping Class 20. This classification is suitable for motors that have longer acceleration times or higher starting torque, providing protection without nuisance tripping.