Belonging to the Sentron JD Frame family, the Siemens HJXD63B400 is a 3-pole, 400A molded case circuit breaker built for industrial environments. It utilizes a thermal-magnetic trip unit with adjustable magnetic settings. This breaker mounts into Siemens P4 and P5 panelboards or switchboards via a secure bolt-on connection. It is HACR rated and approved for reverse feed applications. With a 35kAIC rating at 600VAC, it ensures robust fault clearing. Lugs are sold separately.
HACR Rated, Reverse Feed, High Interrupting Capacity, Non-Interchangeable Trip
Product FAQs
5 answers
Does the HJXD63B400 come with factory-installed lugs?
No. Based on standard Siemens catalog numbering, the "B" in the part number indicates it is supplied as a frame and trip unit only, without lugs. Lugs, such as the TA2J6500, must be sourced separately. If you require this breaker with factory-installed lugs, you will need the equivalent part number ending with an "L" suffix.
What standalone enclosures are compatible with this 400A circuit breaker?
The HJXD63B400 fits into standard Siemens JD-frame enclosures. Compatible catalog numbers include the J6N1 for indoor NEMA 1 applications, the J6N3R for outdoor NEMA 3R applications, and the J6N12 for NEMA 12 dust-tight industrial environments.
Can the HJXD63B400 be reverse fed?
Yes. Siemens Sentron Type HJXD6 molded case circuit breakers are UL Listed for reverse feed applications, providing flexibility for specific panel or switchboard wiring configurations.
How is the trip unit adjusted on this breaker?
This Sentron series breaker features a thermal-magnetic trip unit with a fixed thermal setting for overload protection and an adjustable magnetic setting for short-circuit protection. The magnetic trip dial is located on the front of the breaker, allowing you to properly coordinate it with your system requirements.
How is this breaker mounted into Siemens panelboards?
The HJXD63B400 is designed for bolt-on installation in Siemens P4 and P5 panelboards, as well as Siemens switchboards. Depending on your panel chassis, you will need the correct strap kit or mounting hardware to properly secure this JD-frame breaker to the bus.
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Review summary
Customers rate this product 5.0 out of 5 based on 1 review.