Description
The Siemens 3RB3026-1VB0 is a solid-state electronic overload relay designed to provide precise and dependable motor protection across a wide range of HVAC and industrial applications. Part of the Siemens 3RB30 series, this Size 0 relay offers a broad adjustment range of 10 to 40 amps, making it well-suited for use with variable motor loads and a variety of starter configurations.
Unlike traditional bimetallic overload relays, the 3RB3026-1VB0 uses electronic sensing technology to deliver more accurate trip characteristics, improved repeatability, and enhanced protection against phase failure, phase imbalance, and overload conditions. Its compact Size 0 form factor allows for direct mounting onto compatible Siemens 3RT contactors, simplifying panel assembly and reducing wiring complexity.
Key Features
- Current adjustment range: 10–40A
- Size 0 — compatible with Siemens 3RT Size 0 contactors
- Electronic (solid-state) overload protection for accurate, repeatable tripping
- Phase failure and phase imbalance protection
- Manual and automatic reset modes
- Integrated test and reset button
- Compact design for direct contactor mounting
- Auxiliary contacts for remote signaling and control integration
Typical Applications
- HVAC motor starters and control panels
- Pump and fan motor protection
- Commercial and light industrial motor control centers
- Compressor and blower motor circuits
Why Choose the Siemens 3RB30 Series?
The 3RB30 series electronic overload relays are engineered for reliability and ease of use. The solid-state design eliminates the temperature sensitivity inherent in bimetallic relays, ensuring consistent protection regardless of ambient conditions. With a wide current setting range, the 3RB3026-1VB0 reduces the need for multiple SKUs across different motor ratings, streamlining inventory and simplifying field installation.
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