Built for industrial power distribution, the Square D FHL36020 is a 3-pole, 20A molded case circuit breaker from the F-Frame series. It provides dependable thermal-magnetic protection with fixed long-time and instantaneous (LI) trip functions. This unit-mount breaker installs into compatible Square D enclosures and switchboards. It is replaced by the PowerPact HGL36020, which requires a retrofit kit. Rated for 25kAIC at 480VAC, it handles demanding fault currents and is HACR certified.
Is the Square D FHL36020 still manufactured, or is there a direct replacement?
The FHL36020 is a legacy F-frame circuit breaker that has been discontinued by Schneider Electric. The manufacturer's recommended modern replacement is the PowerPact B-frame series, specifically catalog number BGL36020, though retrofitting may be required depending on your existing enclosure or panelboard.
What type of enclosures and panels are compatible with the FHL36020?
This unit-mount breaker is designed for use in compatible Square D enclosures, switchboards, and motor control centers. Because it features a feed-thru connection with lugs on both the line and load sides, it does not plug onto an I-Line bus and must be hardwired.
What wire sizes are accepted by the lugs on the FHL36020?
The factory-installed lugs accept copper or aluminum wire ranging from 14 AWG to 1/0 AWG. Ensure all connections are torqued to the manufacturer's specifications printed on the breaker label.
What does the "H" in the FHL36020 catalog number indicate?
In Square D's legacy F-frame nomenclature, the "H" designates a high-interrupting capacity breaker. This provides a 25kAIC rating at 480VAC, which is higher than standard F-frame breakers, making it suitable for systems with higher available fault currents.
Does the FHL36020 provide adjustable trip settings?
No, this breaker features a fixed thermal-magnetic trip unit with long-time and instantaneous (LI) protection. Both the thermal overload and magnetic short-circuit trip points are factory-set and non-adjustable.
Can the FHL36020 be loaded to its full 20-amp rating continuously?
Like most standard molded case circuit breakers, the FHL36020 is rated for 80 percent continuous operation. For continuous loads lasting three hours or more, the load should not exceed 16 amps to comply with standard electrical codes.
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Customers rate this product 4.7 out of 5 based on 3 reviews.