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- Molded Case /
- Square D /
LDP36400U31X
LDP36400U31X

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IMAGES ARE FOR REFERENCE ONLY.
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LDP36400U31X Specifications
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LDP36400U31X, Square D, Schneider Electric, PowerPact, type LDP, P, PH, A, V, , UL listed, standard interrupting capacity, Bolt-On, can used for 2P applications, complete with non-interchangeable micrologic standard 3.3 trip, trip functions and load side lug terminals, Solid State electronic, molded case circuit breakers
| Manufacturer | Square D | Subcategory | Molded Case |
| Family | PowerPact | Protection | Solid State |
| Connection | Bolt-On | ||
| Manufacturer | Square D | ||
| Subcategory | Molded Case | ||
| Family | PowerPact | ||
| Protection | Solid State | ||
| Connection | Bolt-On |
Electrical.com is NOT an authorized distributor for Square D and therefore the manufacturer’s warranty does not apply. This product does include an Electrical.com 2 year warranty.



We can test, inspect and repair your LDP36400U31X. All repairs include a 2-Year Electrical.com Warranty.

The Square D LDP36400U31X is a ‑pole, amp PowerPact® L‑frame molded case circuit breaker designed to deliver dependable overcurrent protection in commercial, industrial, and utility electrical distribution systems. As part of Square D’s PowerPact L series, this breaker is engineered for high‑capacity applications such as feeder protection, service entrance disconnects, main distribution panels, and equipment isolation. Rated for voltages up to 600 VAC, the LDP36400U31X provides a balance of robust performance and space‑efficient design, meeting the needs of engineers and contractors specifying reliable circuit protection for larger loads.
Electrically, the LDP36400U31X incorporates a MicroLogic 3.3 electronic trip unit with adjustable long‑time, short‑time, instantaneous, and ground‑fault protection. This electronic trip capability enables users to fine‑tune protective settings based on load characteristics and coordination requirements, improving system selectivity and minimizing nuisance trips. The breaker offers high interrupting capacities of {aic rating}, enabling safe clearing of fault currents in systems with significant available fault energy. Square D’s advanced trip technology also supports enhanced diagnostics and status indication during commissioning and maintenance.
Mechanically, the LDP36400U31X features a bolt‑on mounting design with sturdy line‑side lugs and terminal‑nut load connections to support large conductors and secure termination. Its rotating双‑break contact system and rugged molded case construction improve dielectric strength and fault performance. Designed to comply with UL 489, CSA, and NEMA standards, this PowerPact breaker integrates seamlessly into switchboards, motor control centers (MCCs), and distribution panels, offering long service life and compatibility with Schneider Electric accessories such as auxiliary contacts, shunt trips, and handle mechanisms. Available through Electrical.com, the LDP36400U31X is backed by expert technical support and documentation to assist with system design, installation, and coordination.