Square D ME36600LS Molded Case Circuit Breaker
- 600A
- 3 Pole
- I-Line
Quantity
Square D ME36600LS - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Delivering advanced protection for industrial power systems, the ME36600LS provides 600A of 3-pole capacity. It utilizes a Micrologic trip unit with adjustable long-time and short-time (LS) functions, allowing for precise system coordination and true RMS sensing. Rated at 65kAIC at 480VAC, it easily mounts into Square D I-Line switchboards and panelboards. For modern upgrades, this legacy M-Frame breaker crosses over to the PowerPact LJA36600U33X or PJA36060U33A.Specifications
| Brand | Square D |
|---|---|
| Part Number | ME36600LS |
| Series | ME |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 300-600A |
|---|
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | (3) 3/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LS |
| Trip Function | Long-Time, Short-Time |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lug Kits |
|---|---|
| Accessories | Load Side Lugs Included, Rating Plug (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | 100% Rated, True RMS Sensing, Non-Interchangeable Trip, HACR Rated |
Product FAQs
6 answersWhat type of enclosures accept the ME36600LS circuit breaker?
It is specifically designed to mount in Square D I-Line panelboards and switchboards. The plug-in jaw design is not compatible with NQ, NF, or standard QO load centers.
What do the "LS" trip functions mean on this breaker?
The LS indicates that the built-in electronic trip unit has adjustable Long-Time and Short-Time protection parameters. This allows panel builders to fine-tune the overload and short-circuit response curves for better coordination with downstream devices compared to standard thermal-magnetic breakers.
Does the ME36600LS require a separate mounting base?
No separate base is needed for the line connection. The I-Line construction includes integral plug-in jaws that attach directly to the panel bus bar, meaning you only need to wire the load side lugs.
What is the modern replacement for the legacy ME36600LS?
The legacy ME series was superseded by the Square D PowerPact family. Upgrading to a modern equivalent typically involves selecting a PowerPact L-frame or P-frame breaker with an I-Line connection, matching your specific 600-amp load and interrupting rating requirements.
Is this electronic trip breaker suitable for reverse feeding?
Molded case circuit breakers with electronic trip units are generally not rated for reverse feeding unless explicitly labeled. The line and load connections must be wired exactly as marked on the breaker face to ensure the solid-state circuitry functions correctly.
How many cables can the load side lugs accept?
The standard load lugs on this 600-amp breaker accept up to three conductors per phase. The lugs are dual-rated for aluminum or copper wire ranging from 3/0 AWG to 500 kcmil.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- BWBrian W.Verified BuyerReviewingSquare D ME36800LI - 800A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/3/26Fast delivery!
Fast Delivery and great customer service!