The Siemens 3UA Overload Relay is a bimetal thermal overload relay designed to safeguard motors and electrical loads against prolonged overcurrent and single-phasing. Built with Siemens’ reliability, it ensures dependable protection while integrating seamlessly with Siemens contactors for complete motor control solutions.
Bimetal Technology – Thermal sensing through a bimetal strip
Adjustable Trip Current – Set trip levels as per motor requirements
Inverse Time-Delay Protection – Faster tripping for higher overcurrents
Phase Failure & Unbalance Protection – Shields motors from single-phasing damage
Temperature Compensation – Reliable function across varying ambient temperatures
Manual/Automatic Reset – Flexible reset options after a trip
Trip Indicator – Visual status indicator for easy monitoring
Test Button – Simulates trip condition to verify relay operation
Seamless Integration – Mounts directly with Siemens contactors for motor control
Siemens 3UA overload relays are trusted worldwide for their precision, durability, and ease of use. They provide robust motor protection while minimizing downtime and extending equipment lifespan. With simple adjustability and integration features, they are a go-to choice for industries seeking efficient overload and phase protection.
Industrial motor protection systems
Manufacturing units requiring reliable overload safety
AC/DC load protection
Applications with frequent motor startups
Electrical panels where space-saving integration is essential
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