SIEMENS ED43B125SN BRKR ED4 3P 480V 125A 120V ST Molded Case Circuit Breaker

The Siemens ED43B125SN is a 3-pole molded case circuit breaker designed for use in electrical distribution and switchgear applications. Rated for 125 amps continuous current at 40°C operating temperature, this breaker supports 480V AC and 120V AC systems with a frequency rating of 50/60 Hz. It provides reliable overcurrent protection with an interrupt rating of 18 kAIC, making it suitable for commercial and industrial electrical installations. The breaker is part of Siemens' ED frame series, offering compatibility with various panelboards and switchboards, and is engineered for use by electrical distributors and lighting solutions providers requiring robust wire and cable protection.

Specifications

• Manufacturer: Siemens
• Frame: ED
• Number of Poles: 3
• Voltage Rating: 480V AC, 120V AC
• Current Rating: 125A
• Interrupt Rating: 18 kAIC
• Frequency Rating: 50/60 Hz
• Operating Temperature: 40¬∞C
• Dimensions (W x H x L): 5.0 in x 7 in x 6 in
• Product Weight: 4.64 lbs
• Application: Standard 40¬∞C Breaker
• Actuator: S01ED60 Accessory
• Enclosure: Varying
• UPC: 783643222304
• Manufacturer Part Number: ED43B125SN

Features

• Thermal-magnetic trip unit integrated for reliable overcurrent protection
• Non-interchangeable trip unit design for enhanced safety and compliance with UL 489 / CSA C22.2 No. 5 standards
• Suitable for reverse feeding applications as per Siemens ED frame breaker design
• Compatible with load and line side lugs for flexible wiring configurations
• Manual operation includes ON, OFF, and TRIPPED handle positions with a push-to-trip button for testing
• Mounting hardware and wire connectors available separately for customized installation
• Designed for use in panelboards, switchboards, and individual enclosures

Downloads & Links

• Spec Sheet
• Spec Sheet