Part of the PowerPacT H-Frame series, the Square D HDA36090 is a 3-pole, 90A molded case circuit breaker engineered for commercial applications. It utilizes thermal-magnetic trip technology to deliver precise Long-Time and Instantaneous (LI) protection. Designed for quick installation, this unit plugs into Square D I-Line panelboards and switchboards. It is a direct upgrade for the older FA36090 model.
Which panelboards are compatible with the HDA36090 circuit breaker?
This breaker is exclusively designed for use in Square D I-Line panelboards and switchboards. It cannot be installed in standard NQ or NF unit-mount panels that lack an I-Line bus system.
How does the I-Line connection on the HDA36090 work?
The breaker features plug-in jaws on the line side that mount directly onto the I-Line bus assembly. The load side uses standard mechanical lugs for field wire connections.
What replacement lug kit is used on the load side of this breaker?
The standard load-side lug kit for the HDA36090 is the AL150HD. These mechanical lugs accept 14 AWG through 3/0 AWG copper or aluminum conductors.
What do the first three letters of the HDA36090 catalog number indicate?
In the PowerPacT nomenclature, "H" designates the physical H-Frame size, "D" specifies the standard interrupting rating tier (18 kA at 480 VAC), and "A" indicates the I-Line plug-in mounting style.
What trip functions are included in the HDA36090?
This breaker is equipped with a thermal-magnetic trip unit that provides LI functions: Long-Time (thermal) protection for continuous overloads and Instantaneous (magnetic) protection for short-circuit events.
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