3UB8123-4KW2 – Siemens 133-400A 3 Phase Solid-State Overload Relay Size A1 Motor Protection

3UB8123-4KW2

3UB8123-4KW2 is a Siemens solid-state overload relay designed for motor protection with a current range of 133 to 400 amps and 3-phase operation.This relay features a Size A1 frame and includes a built-in current transformer. It provides reliable motor protection with phase loss and phase unbalance trip functions, adjustable trip class from 5 to 30, and an ambient insensitive design. The conformally coated circuit board enhances durability, and it supports direct mounting or stand-alone use. Certified to UL and CSA standards, it ensures safety and compliance in industrial applications.

• Amperage: 133-400 A
• Voltage: Suitable for 3-phase motor circuits
• Poles: 3
• Mounting Type: Direct mounting or stand-alone
• Interrupt Rating: Solid-state electronic protection
• Series/Frame: Size A1
• Trip Unit: Adjustable Class 5 to 30
• Phase Loss and Unbalance Protection
• Conformally Coated Circuit Board
• Certifications: UL Listed, CSA Certified

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Specifications

• Part Number: 3UB8123-4KW2
• Manufacturer : Siemens
• Brand : Siemens
• Category : Motor Control
• Item Subcategory : Overload Relay
• Family : ESP200
• Type : 3UB8
• Relay Style : Solid State
• Amperage Maximum : 200
• Amperage Minimum : 50

Product Data

• UPC : 66264389724
• GTIN : 00662643897241
• Dimensions : 3.543 x 4.213 x 3.15
• Weight : 1 lb