Siemens 3RB2026-1SB0 Solid State Overload Relay

Product Description

The SIEMENS 3RB2026-1SB0 is a solid state overload relay designed for motor protection in industrial electrical systems. Unlike traditional bimetallic overload relays, this unit uses electronic sensing to monitor motor current and trip the circuit when overload conditions are detected. It provides accurate, repeatable protection across its rated current range without the thermal drift associated with mechanical devices. Licensed electricians and industrial maintenance technicians install this relay in motor control centers, starter assemblies, and panel-mounted applications where reliable overload protection is required.

The 3RB2026-1SB0 is suited for commercial and industrial motor control applications, including conveyor systems, pump stations, fan arrays, and compressor circuits. It is designed to mount in conjunction with compatible Siemens contactor assemblies as part of a complete motor starter assembly. The solid state design is well-suited for environments where frequent starts, variable loads, or demanding duty cycles make traditional thermal relays less reliable.

Key Features

• Solid state electronic overload protection eliminates thermal drift found in bimetallic relays
• Compact form factor suited for motor control center and starter panel installation
• Designed for mounting with compatible contactor assemblies
• Repeatable trip characteristics support consistent motor protection across duty cycles
• Package dimensions of 100 x 96 x 50 millimeters support space-planning in control enclosures

Compatibility

Designed as an OEM-style solid state overload relay for use in industrial motor starter and motor control center assemblies. No specific compatible model numbers were provided in the product data.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the NEC and applicable local codes. De-energize and lock out the panel or motor control center before handling or wiring this relay. Verify contactor compatibility before mounting, and follow the manufacturer wiring diagram for auxiliary contact and trip circuit connections. Do not energize the assembly until all connections are inspected and the enclosure is properly closed.

Technical Specifications

• Relay Type: Solid State Overload Relay
• Package Dimensions (L x W x H): 3.94 inches x 3.78 inches x 1.97 inches
• Weight: 0.45 pounds
• UPC: 75455493365

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RB2026-1SB0