Engineered for commercial and industrial applications, the Siemens LD63B600L is a 3-pole, 600A molded case circuit breaker from the proven Sentron family. It delivers reliable long-time and instantaneous (LI) protection with an interchangeable thermal-magnetic trip unit. Rated for 35 kAIC at 480VAC, this LD frame breaker handles demanding distribution networks. It installs into Siemens S1, S2, and SE panelboards, and serves as a direct drop-in replacement for the legacy ITE LD3600.
Interchangeable Trip Unit, HACR Rated, Reverse Feed
Product FAQs
6 answers
Which Siemens panelboards are compatible with the LD63B600L?
This 600A breaker is designed for installation in Siemens Sentron Type S1, S2, and SE panelboards. It can also be installed in compatible Siemens switchboards and standalone enclosures.
What type of mounting does the LD63B600L require?
This is a unit mount, feed-thru circuit breaker. It bolts directly to the enclosure backplate or mounting pan and connects to the bus via cable, rather than plugging directly into a busbar.
What does the L suffix mean in the LD63B600L catalog number?
The L suffix indicates that the breaker comes complete with factory-installed line and load side lugs. The base LD63B600 model does not include these lugs.
What wire sizes do the factory lugs on this breaker accept?
The included lugs accommodate two conductors per phase, accepting 3/0 AWG to 500 kcmil copper or aluminum wire.
How does the trip unit operate on the LD63B600L?
It utilizes a thermal-magnetic trip unit with fixed long-time (thermal) protection and an adjustable instantaneous (magnetic) trip function. This allows electricians to fine-tune the short-circuit response for proper system coordination.
Is the LD63B600L rated for direct current systems?
Yes, in addition to its AC ratings, this breaker is rated for use in DC applications up to 500VDC, providing a 25kA interrupting capacity.
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