Key Features and Benefits

• Selectable Trip Classes: Users can easily choose between Class 5, 10, 20, or 30 using DIP switches, allowing for application-specific protection for light, normal, or heavy starting conditions.
• Enhanced Protection: The relay offers built-in protection against phase loss (trips in under 3 seconds), phase unbalance, and ground faults (trips at 60% of motor current).
• Heaterless Design: Being solid-state, it requires no heaters, which minimizes heat buildup in enclosures and reduces cooling costs.
• High Accuracy: It boasts a repeat accuracy of greater than 99%, allowing for precise trip settings that can extend motor life.
• User-Friendly Configuration: Configuration is simple with a fine-adjustment dial labeled in full load amps (FLA) and DIP switches for trip class selection, requiring no complex software or manuals.
• Versatile Reset Options: It includes options for manual, automatic, and remote resetting, with visible and audible trip indications.

Technical Specifications (General)

• Phase: Models are available for both 1-phase and 3-phase applications.
• Operating Temperature: Rated for use in temperatures from -25°C to +60°C or +65°C, making it ambient insensitive.
• Auxiliary Contacts: Standard models come with one Normally Open (NO) and one Normally Closed (NC) contact.
• Certifications: UL Listed and CSA Certified. 

• Siemens 3UB81234EW2 Solid State Overload Relay: This 3-phase model has a current range of 10 to 40 A and a Frame Size A1. It is available from retailers such as Ubuy Bangladesh and Buy Rite Electric.
• Siemens 3UB81334FW2 Overload Relay: This 3-phase model is rated for 13 to 52 A and Frame Size B. It’s a smart, modern choice praised by Klimax Poland for its reduced heat generation and diagnostic information.
• Siemens 3UB81334HW2 Overload Relay: A higher current option for 3-phase systems, covering a range of 50 to 200 A.