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Siemens E63B125 - Molded Case Circuit Breaker 125A 600V 3-Pole

Siemens
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Siemens E63B125 is a 3-pole molded case circuit breaker from the E Series, designed for reliable overcurrent protection in industrial and commercial power distribution systems. It features a 125A current rating and a 600VAC voltage rating, with a thermal magnetic trip unit providing LI (Long-Time and Instantaneous) protection functions for effective circuit interruption. This bolt-on mounted breaker weighs 7 lb and supports wire sizes from AWG 3 to AWG 3/0 for copper and AWG 1 to AWG 2/0 for aluminum, operating at a temperature rating of 40 °C. It complies with UL and IEC standards, offering an interrupting rating of 25kA at 480V and 18kA at 600V. Typical applications include main and feeder circuit protection in industrial panels, commercial buildings, and manufacturing facilities.

Key Features & Specifications
  • Manufacturer: Siemens
  • Part Number: E63B125
  • Item Subcategory: Molded Case
  • Family: E Series
  • Type: E
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600VAC
  • Current Rating: 125 Amps
  • Poles: 3
  • Phase: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Interrupt Rating: 25kAIC at 480V; 18kAIC at 600V
  • Weight: 7 lb
  • Wire Gauge: AWG 3 to AWG 3/0, Cu; AWG 1 to AWG 2/0, Al
  • Temperature Rating: 40 °C
  • Standards: UL, IEC