Square D LC26500AC Molded Case Circuit Breaker
- 500A
- 2 Pole
- I-Line
Quantity
Square D LC26500AC - 500A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for demanding industrial environments, this 500A Square D circuit breaker delivers robust thermal-magnetic protection. The 2-pole LC26500AC features an A-C phase connection and offers a 65kA interrupting capacity at 480VAC. Designed specifically for I-Line panelboards and switchboards, it utilizes a plug-on mounting style for secure power distribution. For modern replacements, Square D recommends substituting with the LJA36600U31X 3-pole breaker adjusted to 500A.Specifications
| Brand | Square D |
|---|---|
| Series | LC |
| Amperage | 500A |
| 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 | L |
|---|---|
| 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 AC suffix mean in the LC26500AC catalog number?
The AC suffix indicates the phase connection for the I-Line bus. This specific 2-pole breaker is configured to connect to the A and C phases of a Square D I-Line panelboard or switchboard.
Is the Square D LC26500AC a current production breaker?
No, the Square D LC-frame is a legacy molded case circuit breaker. Schneider Electric has replaced this series with the newer PowerPact L-Frame breakers, though LC breakers remain widely used and available for existing I-Line panelboards.
How does the LC26500AC mount into a panel?
It utilizes Square D's I-Line plug-on mounting system. The line side features plug-on jaws that engage directly with the I-Line bus, while the load side uses traditional mechanical lugs for wire termination.
Can I use aluminum conductors with the LC26500AC?
Yes, the factory-installed lugs are AL/CU rated. They safely accept either aluminum or copper wire, accommodating two conductors per phase ranging from 4/0 AWG to 500 kcmil.
Can the LC26500AC be used in direct current (DC) systems?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is rated for use in DC applications up to 250VDC, providing a 10kA interrupting capacity.
What type of trip unit is installed in the LC26500AC?
It features a thermal-magnetic trip unit with LI (Long-Time and Instantaneous) functions. The thermal element provides fixed overload protection, while the magnetic element is adjustable to fine-tune short-circuit response.
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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.