Built for high-capacity industrial systems, the Square D LIL36600 is a 600A, 3-pole molded case circuit breaker. It delivers robust overcurrent protection for heavy-duty switchboards, motor control centers, and standalone enclosures. This unit-mount MCCB utilizes a standard feed-thru configuration with lug terminals. When upgrading older panels, this legacy breaker is replaced by the newer PowerPact LRL36600U31X. The thermal-magnetic trip unit provides reliable LI protection functions.
What is the modern replacement for the legacy Square D LIL36600 circuit breaker?
The LIL36600 is a legacy L-frame breaker. When upgrading older panels or replacing this unit, the newer PowerPact LRL36600U31X is the direct modern equivalent.
What types of equipment are compatible with the LIL36600 breaker?
This unit-mount breaker is designed for use in heavy-duty Square D switchboards, motor control centers, and standalone enclosures.
What wire sizes and materials are accepted by the lugs on the LIL36600?
The standard lugs accept two cables per phase, ranging from 2/0 AWG to 500 kcmil. They are rated for both aluminum and copper conductors.
Is the Square D LIL36600 a current-limiting circuit breaker?
Yes, the LIL series features a current-limiting design. This provides high interrupting capacities, up to 200kA at 480VAC, to protect downstream equipment from severe short circuits.
What trip functions are included in the LIL36600 thermal-magnetic trip unit?
It features an LI trip configuration, which provides fixed thermal protection for long-time overcurrents and adjustable magnetic protection for instantaneous short-circuit response.
Does the LIL36600 plug into an I-Line panelboard?
No, this specific model is a unit-mount breaker with a feed-thru connection and lug terminals. It is not designed for I-Line or plug-in panelboard constructions.
Is the LIL36600 suitable for HVAC applications?
Yes, this breaker is HACR rated, meaning it is certified for use with commercial heating, air conditioning, and refrigeration equipment.
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