Engineered for industrial applications, the MXD63B600 is a 600A, 3-pole molded case circuit breaker from the Siemens Sentron family. It features a robust MD frame and provides reliable thermal-magnetic protection with Long-Time and Instantaneous (LI) trip functions. This unit-mount breaker installs into Siemens Sentron S4 and S5 panelboards, as well as SB-series switchboards and motor control centers. Rated for 65kAIC at 240VAC, it includes an adjustable magnetic trip (3000-6000A).
Which Siemens enclosures and panelboards accept the MXD63B600 breaker?
This MD frame breaker is compatible with Siemens Sentron Type S4 and S5 panelboards, SB1, SB2, and SB3 switchboards, as well as Siemens Motor Control Centers.
What is the difference between the MXD63B600 and the HMXD63B600?
The MXD63B600 is the standard-tier interrupting version rated at 50kAIC at 480VAC. The HMXD63B600 is the high-interrupting version rated at 65kAIC at 480VAC. Both are 600A, 3-pole MD frame breakers with identical physical dimensions.
How is the trip unit configured on the MXD63B600?
It utilizes a thermal-magnetic trip unit with Long-Time and Instantaneous (LI) protection. The thermal overload setting is fixed at 600A, while the magnetic short-circuit trip is adjustable to coordinate with downstream devices.
Which lug kits are compatible with this breaker?
As an MD frame breaker, it accepts standard Siemens lug kits such as the TA3K500 for aluminum or copper wire, and the TC2K500 for copper-only applications. Lugs are typically installed on both the line and load sides.
Is the MXD63B600 suitable for DC power systems?
Yes, it is rated for DC applications up to 250VDC with a maximum interrupting capacity of 25kAIC.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.