The Square D HGL36040SA is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 40 Amps and a voltage rating of 600VAC, 500VDC. It has an interrupting rating of 65kAIC at 240V, 35kAIC at 480V. The HGL36040SA has a feed-thru connection type and includes long time and instantaneous trip functions.
What does the 'SA' suffix mean in the HGL36040SA catalog number?
The 'SA' suffix indicates that this circuit breaker includes a factory-installed 120V AC shunt trip. This allows the breaker to be tripped remotely using a 120V control signal, which is commonly used for emergency shutdown or industrial automation systems.
Can the Square D HGL36040SA be reverse fed?
Yes. Standard unit-mount PowerPacT H-frame thermal-magnetic circuit breakers with factory-sealed trip units are suitable for reverse connection (backfeeding).
What type of mounting does the HGL36040SA require?
The 'L' in the HGL prefix indicates this is a unit-mount circuit breaker. It is designed to be bolted directly to a backpan or mounting plate in a control panel or switchboard, and it connects via lugs on both the line and load sides.
What type of trip unit is installed in the HGL36040SA?
This breaker features a thermal-magnetic trip unit. It provides fixed long-time (thermal) protection for overloads and fixed instantaneous (magnetic) protection for short circuits.
Is the HGL36040SA compatible with Square D I-Line panelboards?
No. The HGL36040SA is a unit-mount breaker designed for lug-to-lug connections. For I-Line panelboards, you must use an I-Line plug-on breaker.
How does the HGL36040SA indicate a tripped condition?
When the breaker trips due to an overcurrent, short circuit, or a signal from the shunt trip, the handle moves to a distinct center position. This provides clear visual confirmation that the circuit has opened.
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