Siemens MD63T500 Trip Unit – Sentron Series – 500A – 3 Pole – 600VAC – Thermal Magnetic – MD/HMD Compatible

The Siemens MD63T500 is a Sentron Series molded case circuit breaker trip unit designed for use with Siemens MD and HMD frame circuit breakers. Rated at 500A and 600VAC, this 3-pole thermal-magnetic trip unit provides reliable overload and short-circuit protection for high-capacity industrial and commercial power distribution systems.

Engineered with Long-Time and Instantaneous (LI) protection functions, the MD63T500 delivers dependable performance by responding to sustained overload conditions and high-level fault currents. It is designed for integration into compatible Siemens MD and HMD molded case circuit breaker assemblies, ensuring consistent protection and operational reliability.

This trip unit is UL listed and built for demanding applications where precise protection coordination and high interrupting performance are required.

Specifications

• Brand: Siemens
• Part Number: MD63T500
• Series: Sentron Series
• Type: Trip Unit / Programmer
• Frame Compatibility: MD / HMD Frame
• Category: Molded Case Circuit Breaker Trip Unit
• Configuration: 3 Pole
• Protection Type: Thermal Magnetic
• Trip Functions: LI – Long-Time and Instantaneous

Electrical Ratings

• Current Rating: 500A
• Voltage Rating: 600VAC
• Number of Poles: 3 Pole
• Interrupting Capacity: 50kA @ 480VAC
• Interrupting Capacity: 25kA @ 600VAC

Construction

• Heavy-duty trip unit assembly
• Designed for MD and HMD frame circuit breakers
• Precision thermal-magnetic sensing system
• Plug-in style compatibility (frame dependent)
• Industrial-grade construction for long-term reliability

Functions

• Overload protection
• Short-circuit protection
• Long-time delay protection
• Instantaneous fault protection
• Trip coordination within breaker systems

Dimensions

• Width: 9 in
• Height: 16 in
• Depth: 6 in

Standards

• UL Listed
• CSA Approved

Applications

• Industrial power distribution systems
• Commercial electrical switchboards
• Heavy-duty feeder protection
• Main distribution equipment
• Manufacturing facilities
• High-capacity electrical systems
• MD/HMD frame breaker assemblies

Returns are easy

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

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