Square D LC26400BC Molded Case Circuit Breaker
- 400A
- 2 Pole
- I-Line
Quantity
Square D LC26400BC - 400A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for heavy-duty power distribution, the Square D LC26400BC is a 400A, 2-pole molded case circuit breaker. It provides robust thermal-magnetic LI protection with adjustable magnetic trip settings. Designed for Square D I-Line panelboards, this LC-Frame breaker features plug-on mounting configured for B-C phase connections. For modern replacements, it can be substituted with the LJA36400U31X. This extra-high capacity breaker delivers an impressive 100kAIC rating at 240V and is HACR rated.Specifications
| Brand | Square D |
|---|---|
| Part Number | LC26400BC |
| Series | LC |
| Amperage | 400A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | LC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | (2) 4/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 4/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Extra High Interrupting Capacity |
Product FAQs
6 answersWhat does the "BC" suffix indicate on the LC26400BC catalog number?
The "BC" designates the factory-configured jaw arrangement for the I-Line plug-on connection. This 2-pole breaker is built to connect specifically to the B and C phases of the panelboard bus.
What is the modern replacement for the legacy LC26400BC breaker?
The LC frame is a legacy product. For modern installations or upgrades in Square D I-Line panelboards, this breaker is typically replaced by the PowerPacT L-Frame series.
What wire sizes are supported by the standard lugs on this 400A breaker?
The standard lugs accommodate two conductors per phase. They accept aluminum or copper wiring ranging from 4/0 AWG to 500 kcmil.
Is the trip unit on the LC26400BC adjustable?
Yes, the interchangeable thermal-magnetic trip unit features an adjustable magnetic setting for instantaneous short-circuit protection, while the thermal long-time overload protection remains fixed.
Can this breaker be installed in a standard unit-mount enclosure?
No, the LC26400BC features an I-Line style plug-in connection. It is designed exclusively for use in Square D I-Line panelboards and switchboards and cannot be used in standard unit-mount applications.
Is the LC26400BC rated for direct current (DC) systems?
Yes, in addition to its AC ratings, this breaker is rated for DC applications up to 250VDC, providing an interrupting capacity of 10kA at 250VDC.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- DLDeanna L.Verified BuyerReviewingSquare D LC36600 - 600A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/11/26Square D LC36600 - 600A 3 Pole Molded Case Circuit Breaker
Worked great! Our customer was very pleased with the results.