3UB8123-4JW2 - Siemens 3RB3 / 3UB8 Electronic Overload Relay 25–100 A Adjustable Class 10

3UB8123-4JW2

3UB8123-4JW2 is a Siemens electronic overload relay designed for precise motor protection against overload, phase imbalance, and phase failure in industrial control applications. This 3-pole relay provides an adjustable current range of 25–100 A and features a Class 10 trip characteristic. The 3UB8123-4JW2 integrates with Siemens 3RT contactors to form a complete motor starter assembly. It includes manual or automatic reset options, a test function, and a trip indicator for easy monitoring and maintenance. Engineered for accuracy and long-term reliability, this relay meets international standards for motor protection and energy efficiency.

• Manufacturer: Siemens
• Series: 3UB8 / 3RB3 Electronic Overload Relays
• Type: Electronic Overload Relay
• Poles: 3
• Adjustable Current Range: 25–100 A
• Trip Class: Class 10
• Reset Mode: Manual or automatic
• Mounting: Direct mount to 3RT contactors
• Features: Test button, trip indicator, adjustable current dial
• Standards: IEC 60947-4-1, UL Listed, CSA Certified
• Application: Motor overload and phase protection in pumps, conveyors, fans, and industrial machinery

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Specifications

• Part Number: 3UB8123-4JW2
• Manufacturer : Siemens
• Brand : Siemens
• Category : Motor Control
• Item Subcategory : Overload Relay
• Family : ESP200
• Type : 3UB8
• Temp Rating : -13-158 ¡F (-25-70 ¡C)
• Relay Style : Solid State
• Amperage Maximum : 80
• Amperage Minimum : 20

Product Data

• UPC : 66264389723
• GTIN : 00662643897234
• Weight : 44 lb
• Temp Rating : -13-158 ¡F (-25-70 ¡C)