Square D RJA36120CU44AE1 1200A Circuit Breaker – Long Description

The Schneider Electric Square D RJA36120CU44AE1 is a high-performance molded case circuit breaker from the PowerPact R range, engineered to deliver reliable protection and advanced monitoring capabilities for commercial and industrial power distribution systems. With a 1200A current rating, 3-pole configuration, and electronic trip functionality, this breaker is designed to safeguard electrical infrastructure against overloads, short circuits, and ground faults while maintaining operational continuity.

This model incorporates an advanced Micrologic electronic trip unit, providing precise protection coordination with adjustable long-time, short-time, instantaneous, and ground-fault (LSIG) functions. The intelligent trip system enhances system selectivity, reduces nuisance tripping, and allows operators to monitor load performance for improved energy management and preventive maintenance planning.

Designed for I-Line mounting, the breaker offers fast installation and secure electrical connections in panelboards and switchboards. Its robust construction supports demanding operating environments, with a wide temperature tolerance and compliance with major international standards such as UL, CSA, and IEC. The unit also provides a high interrupting capacity suitable for modern distribution systems with elevated fault levels.

The PowerPact R series is widely recognized for durability, compact footprint, and long service life, making the Square D RJA36120CU44AE1 an excellent choice for applications including manufacturing facilities, data centers, infrastructure projects, and large commercial buildings where dependable power protection is critical.

Key Features

Rated current: 1200A
Poles: 3P
Rated operational voltage: up to 600 VAC
Electronic Micrologic trip unit with LSIG protection
High interrupting capacity for industrial fault levels
I-Line mounting for simplified installation
Compatible with copper or aluminum conductors
Certifications: UL, CSA, IEC compliant
HACR rated for HVAC applications

Typical Applications

Industrial power distribution systems
Commercial switchboards and panelboards
Critical infrastructure and facilities
Motor control and heavy electrical loads

Square D RJA36120CU44AE1 3 Pole 1200A I-Line Circuit Breaker, Pre-installed trip unit, I-Line plug-on connectors, Terminal hardware or lugs (if included), Mounting hardware (if applicable), User manual and installation guide, Test or calibration certificate (if provided), Safety and compliance documentation, Manufacturer warranty card, Original Square D or Schneider Electric packaging