Overview
The Siemens 3UA54 00-1J overload relay is a solid state protective device designed for motor control circuits. Rated at 6.3-10A with a 660V maximum operating voltage, this compact unit provides reliable thermal and electronic overload protection in industrial motor starter assemblies. The 3UA54 00-1J is part of Siemens’ World Series family and integrates seamlessly with standard contactors for drop-in motor protection applications.
Key Features
- Solid state relay design for reliable electronic overload detection and trip response
- Manual reset button for field control and safety compliance
- Pre-wired with all connectors and terminals for fast installation
- Suitable for use with Siemens 3TF44 and 3TB44 World Series contactors
- Compact modular form factor fits standard DIN mounting rails
- VDE 0660 certification for European motor control standards
Technical Specifications
- Amperage Range: 6.3–10A (adjustable thermal curve)
- Maximum Voltage: 660V AC
- Relay Type: Solid state (electronic overload)
- Series: Siemens World Series (Type 3UA)
- Compatible Contactors: 3TF44, 3TB44
- Reset Type: Manual with auxiliary switch contacts
- Certifications: VDE 0660, IEC compliant
Typical Applications
Motor protection in industrial machinery, pump control systems, conveyor drives, and compressor circuits. Widely used in manufacturing environments requiring reliable overload sensing and trip logic. Suitable for three-phase and single-phase motor starters operating under normal to moderate duty cycles.
Compatibility & Replacements
Direct fit for Siemens 3TF44 and 3TB44 contactor assemblies. Compatible with other 6.3-10A overload requirements in World Series motor starter packages. Check your main contactor model before installation. Alternative Siemens overload relays in the 3UA family include the 3UA54-00-2B (12.5-20A) and 3UA54-00-2Q (25-36A) for higher amperage circuits.
