Siemens MD63F800 Circuit Breaker – Sentron Series – 800A – 3 Pole – 600VAC – Thermal Magnetic – Feed-Thru – MD Frame

The Siemens MD63F800 is a Sentron Series molded case circuit breaker designed for high-capacity power distribution systems requiring reliable overload and short-circuit protection. Rated at 800A and 600VAC, this 3-pole breaker is engineered for three-phase applications in demanding industrial and commercial environments.

Equipped with a thermal-magnetic trip unit, the MD63F800 provides Long-Time and Instantaneous (LI) protection, ensuring dependable response to both sustained overload conditions and high-level fault currents. Built on Siemens’ MD frame platform, this breaker is designed for heavy-duty performance and is suitable for feeder and main distribution applications.

Featuring a feed-thru connection design and a frame-only configuration, this breaker is intended for integration with compatible accessory components and panelboard systems. Its rugged construction ensures long-term durability and reliable operation under high electrical loads.

Specifications

• Brand: Siemens Breakers
• Part Number: MD63F800
• Series: Sentron Series
• Type: MD Molded Case Circuit Breaker
• Frame Type: MD Frame
• Category: Molded Case Circuit Breaker
• Mounting Type: Feed-Thru
• Configuration: Frame Only
• Protection Type: Thermal Magnetic
• Trip Functions: LI – Long-Time and Instantaneous
• Ambient Rating: 40°C

Electrical Ratings

• Current Rating: 800A
• Voltage Rating: 600VAC
• Number of Poles: 3 Pole
• Phase: 3 Phase
• Interrupting Capacity: 50kA @ 480VAC
• System Voltage Capability: Up to 600VAC

Construction

• Heavy-duty molded case construction
• MD frame design for high-current applications
• Feed-thru connection configuration
• Thermal-magnetic trip mechanism
• Frame-only breaker assembly
• Industrial-grade durable housing
• Designed for main and feeder protection applications

Functions

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

Dimensions

• Height: 10 in
• Width: 12 in
• Depth: 19 in
• Weight: 48.5 lbs

Standards

• UL Listed
• CSA Approved

Applications

• Industrial power distribution systems
• Main electrical switchboards
• Heavy-duty feeder protection
• Large commercial facilities
• Manufacturing plants
• High-capacity electrical infrastructure

Returns are easy

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

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