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Siemens 3UB8123-4EW2 - Solid State Overload Relay 10-40A (ESP200)

Siemens
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Siemens 3UB8123-4EW2 is a solid state overload relay from the ESP200 family, designed for precise motor protection in three-phase industrial applications. It operates with a current rating of 10 to 40 Amps and features switchable trip unit classes from 5 to 30, ensuring adaptable overload protection. The relay has compact dimensions of 3.543 x 4.213 x 3.15 inches, weighs 0.525 lb, and supports both direct mounting and stand-alone installation with a Size A1 frame. It is built to operate reliably in ambient temperatures ranging from -13 to 158 °F (-25 to 70 °C) and is manufactured in Czechia. This overload relay is commonly used for motor control and protection in automation and manufacturing environments.

Key Features & Specifications
  • Type: Solid State Overload Relay
  • Manufacturer: Siemens
  • Family: ESP200
  • Current Rating: 10-40A
  • Phase: 3 Phase
  • Frame Size: A1
  • Trip Unit Class: 5...30, switchable
  • Mounting Type: Direct mounting and stand-alone
  • Dimensions: 3.543 x 4.213 x 3.15 in
  • Weight: 0.525 lb
  • Temp Rating: -13-158 °F (-25-70 °C)
  • Country of Origin: Czechia


Product Identification
  • UPC: 66264389722
  • GTIN: 00662643897227