Rated 25kAIC at 240VAC, the Square D HDL26090 functions as a 2-pole, 90A MCCB from the PowerPacT H-Frame series. It delivers fixed thermal-magnetic (LI) trip functions. Designed for unit mounting, this breaker integrates into industrial control panels and switchboards using included lugs. It acts as a modern replacement for the legacy FAL26090. The current-limiting design includes a Visi-Trip indicator, allowing personnel to quickly identify tripped circuits and minimize downtime.
Can the HDL26090 be installed in a Square D I-Line panelboard?
No. The HDL prefix indicates a unit-mount circuit breaker designed for backpan or DIN rail mounting. For an I-Line panelboard, an HDA plug-on breaker is required.
What is the modern replacement for the legacy FAL26090 circuit breaker?
The HDL26090 from the PowerPacT H-Frame series serves as a functional unit-mount replacement for the obsolete FAL26090. Schneider Electric also offers the B-Frame BDL26090 as a direct replacement. Always verify enclosure dimensions and mounting hardware when upgrading from F-Frame to H-Frame or B-Frame breakers.
What do the letters in the HDL prefix of the catalog number mean?
In the Square D PowerPacT nomenclature, H denotes the frame size. D indicates the interrupting rating class (18kA at 480VAC). L signifies that the breaker is unit-mounted and comes with factory-installed lugs on both the line and load sides.
Can I adjust the trip settings on the HDL26090?
No. This breaker features a fixed thermal-magnetic trip unit. Both the long-time (thermal) and instantaneous (magnetic) trip points are factory-set and cannot be adjusted in the field.
Does the HDL26090 come with mounting lugs?
Yes, as a unit-mount breaker, it includes factory-installed line and load lugs. These standard lugs accept one 14 AWG to 3/0 AWG copper or aluminum wire per phase.
Can the HDL26090 be reverse fed?
Yes, this breaker is suitable for reverse-feed applications. The line and load connections can be swapped without affecting the breaker's protective functions or trip characteristics.
What does the LI trip function code mean on this breaker?
The LI designation indicates that the thermal-magnetic trip unit provides Long-Time (L) protection against overloads and Instantaneous (I) protection against short circuits.
Is the HDL26090 rated for 100% continuous current?
No, this is a standard 80% rated circuit breaker. Continuous loads should not exceed 72 amps (80% of its 90A rating) for periods longer than three hours to prevent nuisance tripping.
How does the Visi-Trip indicator improve panel safety?
The Visi-Trip indicator is a highly visible red flag that appears in the breaker window when it has tripped due to a fault. This safety feature allows personnel to quickly identify the tripped breaker in a crowded control panel before beginning maintenance.
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