BRKR ED4 3P 480V 125A Molded Case Circuit Breaker

The Siemens BRKR ED4 3P 480V 125A is a low voltage molded case circuit breaker designed for electrical distribution and protection applications. It features a thermal-magnetic trip unit calibrated for standard 40°C operation, suitable for use in industrial and commercial switchgear assemblies. This 3-pole circuit breaker supports a 125 amp continuous current rating with an interrupting capacity of 18 kAIC at 480 volts AC, making it a reliable choice for electrical distributors and lighting solutions requiring robust wire and cable protection.

Specifications

• Manufacturer: Siemens
• Manufacturer Part #: ED43B125
• Frame Type: ED
• Number of Poles: 3
• Voltage Rating: 480 V AC
• Current Rating: 125 A
• Interrupting Rating: 18 kAIC at 480 V
• Frequency Rating: 50/60 Hz
• Operating Temperature: 40¬∞C
• Dimensions (W x H x D): 5.6 in x 7.4 in x 3.9 in
• Weight: 3.79 lbs
• Country of Origin: Mexico
• Trip Unit: Thermal-Magnetic, Non-Interchangeable
• Wire Range (Load Lugs Only): Copper 3 AWG to 3/0 AWG, Aluminum 1 AWG to 2/0 AWG

Features

• Standard 40¬∞C calibrated breaker frame with standard breaking capacity
• Non-interchangeable trip unit compliant with UL 489 and CSA C22.2 No. 5 requirements
• Equipped with load-side lugs only, suitable for copper and aluminum conductors within specified wire ranges
• Designed for reverse feed applications per UL and CSA standards
• Compact dimensions facilitate installation in panelboards and switchboards
• Thermal-magnetic trip mechanism provides reliable protection against overloads and short circuits

Downloads & Links

• Spec Sheet
• Spec Sheet