Siemens JXD63M400 Circuit Breaker – Sentron Series – 400A – 3 Pole – 600VAC – Thermal Magnetic – Bolt-On – 50°C Calibrated

The Siemens JXD63M400 is a Sentron Series low-voltage molded case circuit breaker engineered to provide dependable overload and short-circuit protection for commercial, industrial, and power distribution applications. Rated at 400A and 600VAC, this 3-pole breaker is designed for three-phase electrical systems requiring reliable protection and robust performance under demanding operating conditions.

Equipped with a thermal-magnetic trip unit featuring Long-Time and Instantaneous (LI) protection functions, the JXD63M400 delivers effective protection against overload conditions and high-level fault currents. Built on the Siemens JD frame platform, this breaker incorporates a non-interchangeable trip unit and is specially calibrated for operation at 50°C ambient temperatures, making it suitable for installations exposed to elevated environmental temperatures.

The breaker meets UL 489 and IEC 60947-2 standards and is supplied without lugs installed, allowing flexibility in selecting terminal connections based on specific installation requirements. Its rugged construction ensures dependable operation in industrial facilities, commercial buildings, and critical power distribution systems.

Specifications

• Brand: Siemens Breakers
• Part Number: JXD63M400
• Series: Sentron Series
• Type: JXD Molded Case Circuit Breaker
• Category: Molded Case Circuit Breaker
• Connection Type: Bolt-On
• Frame Type: JD Frame
• Protection Type: Thermal Magnetic
• Trip Unit: Non-Interchangeable
• Calibration: 50°C Ambient
• Special Features: No Lugs Installed

Electrical Ratings

• Current Rating: 400A
• Voltage Rating: 600VAC
• Number of Poles: 3 Pole
• Phase: 3 Phase
• Interrupting Capacity: 100kA @ 480VAC
• Interrupting Capacity: 25kA @ 600VAC
• Trip Functions: LI – Long-Time and Instantaneous

Construction

• Heavy-duty molded case construction
• JD frame design
• Bolt-on mounting configuration
• Thermal-magnetic trip mechanism
• Non-interchangeable trip unit
• 50°C calibrated operation
• Supplied without lugs installed
• Durable industrial-grade housing

Functions

• Overload protection
• Short-circuit protection
• Long-time delay protection
• Instantaneous fault protection
• Circuit switching and isolation

Dimensions

• Width: 7.5 in
• Height: 11 in
• Depth: 4 in
• Weight: 15.020 lbs

Standards

• UL 489
• IEC 60947-2
• CSA Approved

Applications

• Commercial electrical distribution systems
• Industrial power distribution equipment
• Switchboards and panelboards
• Three-phase feeder protection
• Manufacturing and processing facilities
• High-ambient-temperature installations
• Equipment and machinery protection
• Critical power distribution systems

Returns are easy

You may return items within 30 days of delivery for a refund.

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