Overview
The Siemens 3UA5800-2F thermal overload relay is a bimetal-based protection device designed for motor overload detection and thermal motor protection. With a 32-50A current range and ON/OFF indicator, this relay features front-mounting capability. This model provides reliable sensing of motor overcurrent conditions to prevent winding damage and operational faults in industrial automation and motor control applications.
Key Features
- Bimetal overload sensing with adjustable current settings
- ON/OFF indicator for quick status verification
- Thermal-delayed overload detection with setting range of 32 to 50A
- Front-mount design for direct mounting onto contactors and starters
- Integrated 1NO+1NC auxiliary contact configuration
- Manual reset operation for controlled restart after trip events
Technical Specifications
The 3UA5800-2F delivers straightforward, field-proven motor protection in standard industrial configurations.
Typical Applications
The Siemens 3UA5800-2F is commonly deployed in motor control centers, pump and compressor protection circuits, conveyor drives, HVAC systems, and industrial automation equipment where motor overload protection is critical. The relay’s thermal sensing is ideal for applications requiring precise motor current monitoring and protection against sustained overload conditions that could damage motor windings or reduce operational lifespan.
Compatibility & Replacements
Compatible With
- Siemens 3TF series contactors
- Siemens motor starters and contactor assemblies
- Standard 230V/400V AC motor control circuits
- Industrial motor protection panels and MCC cabinets
Replaces / Drop-In Replacement For
The 3UA5800-2F is the primary model for its 32-50A rating in the Siemens 3UA5800 series. Verify with your system integrator or the original equipment documentation to confirm direct substitution for legacy overload relay models in your specific contactor frame.
Works With
- Siemens 3TF contactors and motor starters
- Standard AC 50/60Hz motor control circuits
- Manual and automatic control schemes
- Motor protection and thermal sensing applications
