Designed for heavy-duty applications, the Square D HDA36060 is a 3-pole, 60A molded case circuit breaker in the PowerPacT H-Frame family. It provides reliable long-time and instantaneous (LI) protection. This 80% rated breaker features an ABC phase connection and mounts into Square D I-Line panelboards and switchboards. It serves as a functional replacement for the older FA36060 model. With an 18kAIC rating at 480VAC, this current-limiting MCCB includes a Visi-Trip visual indicator.
Can the HDA36060 replace older Square D F-frame circuit breakers?
Yes. The PowerPacT H-frame series is the current replacement for legacy F-frame breakers, including FA, FH, and FC models. The I-Line footprint remains compatible, allowing this breaker to plug directly into older Class 612 panelboards.
How does this breaker connect to the panel and load?
The line side features an I-Line plug-on jaw connection that engages directly with the panelboard bus. The load side uses mechanical lugs rated for 14 to 3/0 AWG copper or aluminum conductors.
What does the "D" in the HDA36060 catalog number signify?
The "D" denotes the specific interrupting capacity tier within the PowerPacT series. For this model, it signifies a maximum interrupting rating of 18 kA at 480VAC and 25 kA at 240VAC.
What are the instantaneous trip settings for this 60A breaker?
The breaker utilizes a fixed thermal-magnetic trip unit with a magnetic hold current of 800A and a magnetic trip threshold of 1450A.
Which Square D panels accept the HDA36060?
This breaker is exclusively designed for Square D Class 612 I-Line panelboards and I-Line switchboards. It is not compatible with standard QO, NQ, or NF series load centers.
Is the HDA36060 rated for continuous operation at 100 percent of its rated current?
No. This is a standard-rated circuit breaker intended for continuous operation at 80 percent of its 60A capacity, conforming to standard NEC application guidelines for non-motor loads.
What internal mechanism is used to limit fault currents?
PowerPacT H-frame breakers utilize dual-break rotating contacts. This design rapidly repels during high fault conditions to extinguish arcs, limiting peak short-circuit current and reducing let-through energy.
How can I manually test the mechanical trip operation?
PowerPacT H-frame circuit breakers feature an integral push-to-trip button on the front faceplate. Pressing this button mechanically trips the internal contacts to verify the mechanism operates correctly prior to commissioning.
Can field-installable accessories be added to this breaker?
Yes. The PowerPacT H-frame design accommodates field-installable accessories, such as shunt trips, auxiliary contacts, and undervoltage releases. These components mount easily behind the removable front accessory cover.
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Review summary
Customers rate this product 5.0 out of 5 based on 11 reviews.