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Siemens 3UB8123-4MW2 - Solid State Overload Relay 250-750A

United Fuses
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The Siemens 3UB8123-4MW2 is a solid-state overload relay designed to protect three-phase motors from overcurrent conditions. This device operates with a current rating range of 250 to 750 amps and is compatible with motor starter frames. The relay features a switchable direct mounting style and weighs 5.19 lb, constructed for robust industrial environments. It complies with RoHS standards and is engineered for reliable solid-state protection in motor control applications. Typical uses include protecting motors in manufacturing, pumping, and conveyor systems.

Key Features & Specifications
  • Type: Solid State Overload Relay
  • Voltage: Not specified
  • Current: 250-750A
  • Dimensions: Not specified
  • Standards: RoHS
  • Applications: Motor protection in industrial settings
  • Switch Type: Not specified
  • Configuration: Not specified
  • Coil Voltage Maximum: Not specified
  • Temp Rating: Not specified
  • Shipping Dimensions: Not specified
  • Phase: 3
  • Voltage: Not specified
  • Amperage: 250-750A
  • AIC rating: Not specified
  • Connection: Not specified
  • Poles: Not specified
  • Protection: Solid State
  • Functions: Overload protection
  • Frame Size: Not specified
  • Trip Type: Not specified
  • Panel Type: Not specified
  • Breaker Type: Not specified
  • Control Voltage Minimum: Not specified
  • Control Voltage Maximum: Not specified
  • MCM Size: Not specified
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not specified
  • Insulation Temperature: Not specified
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not specified
  • Class Rating: Not specified
  • Diameter: Not specified
  • Velocity: Not specified
  • Clip Center: Not specified
  • Clas: Not specified
  • Mounting: Switchable Direct
  • Hz: Not specified
  • Coil Material: Not specified
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: Not specified
  • Dist Voltage: Not specified
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: Not specified
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not specified
  • Coil Voltage Minimum: Not specified
  • Wire: Not specified
  • Amperage Maximum: 750A
  • Amperage Minimum: 250A
  • Nema Rating: Not specified
  • Switch Style: Not specified
  • Wire Size: Not specified
  • Certification: RoHS
  • Circuit Breaker Mounting Style: Switchable Direct
  • Terminal Connection: Not specified
  • Frequency Rating: Not specified
  • Phase Connection: Not specified
  • Standards: RoHS
  • Compatible Frames: Motor Starters
  • Installation Type: Not specified
  • Item QTY: Not specified
  • Nema Starter Size: Not specified
  • Breaker Frame: Not specified
  • Current Rating: 250-750A
  • Reverse Standoff Voltage: Not specified
  • Watts: Not specified
  • Peak Pulse Current: Not specified
  • Breakdown Voltage (MIN VBR@IT ) (V): Not specified
  • Breakdown Voltage (VBR@IT) (V): Not specified
  • Polarity: Not specified
  • Operating Temperature Maximum Celsius: Not specified
  • Max Clamp Voltage: Not specified
  • On-State Current: Not specified


Product Identification
  • UPC: 66264389726
  • GTIN: 00662643897265