Description
Siemens 3UB8523-5EW2 Overload Relay Overview
The Siemens 3UB8523-5EW2 is a 3-phase bimetallic overload relay engineered to provide dependable motor protection across a wide range of industrial and commercial HVAC applications. With an adjustable current setting range of 10 to 40 amps, this relay guards motors against damaging overload conditions, phase loss, and phase imbalance — helping extend equipment life and reduce costly downtime.
Key Features
- Adjustable trip current range: 10–40 amps
- 3-phase overload protection for motors and starters
- Bimetallic thermal sensing element for accurate, reliable tripping
- Phase loss and phase imbalance sensitivity
- Manual and automatic reset capability
- Compact design for panel and starter mounting
- Siemens 3UB series — designed for use with compatible Siemens contactors and motor starters
Application
The 3UB8523-5EW2 is well-suited for motor protection in HVAC systems, commercial refrigeration, pump and fan applications, and general industrial motor control. It is designed to mount directly to compatible Siemens contactors, simplifying panel assembly and wiring.
Why Choose Siemens Overload Relays
Siemens overload relays are trusted across the HVAC and industrial trades for their precision engineering, long service life, and compatibility with the broader Siemens SIRIUS control product family. The 3UB series offers a straightforward, cost-effective solution for motor protection without sacrificing performance or reliability.
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