Square D MHL366001288 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Unit Mount
Quantity
Square D MHL366001288 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Delivering reliable long-time and instantaneous protection, this 600A, 3-pole MCCB is designed for heavy-duty industrial power systems. It installs into Square D switchboards and motor control centers using a standard unit-mount configuration. For future upgrades, this legacy M-Frame model is replaced by the MJL36600. The breaker features a 65kAIC rating at 480VAC, thermal-magnetic trip technology, and comes equipped with a 48VDC shunt trip for remote disconnect capabilities.Specifications
| Brand | Square D |
|---|---|
| Part Number | MHL366001288-R |
| Series | MHL |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 50kA @ 250VDC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| Wire Gauge | (3) 3/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs (AL900MA), Shunt Trip (48 VDC) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, High Interrupting Capacity, Non-Interchangeable Trip |
Product FAQs
6 answersWhat is the modern replacement for the legacy MHL366001288?
The legacy M-Frame MHL366001288 is obsolete and has been replaced by the PowerPact M-Frame series, specifically the MJL36600. Upgrading to the PowerPact series may require different mounting hardware or enclosure modifications.
What does the 1288 suffix indicate on this M-Frame breaker?
The 1288 suffix signifies that the breaker is factory-equipped with a 48VDC shunt trip accessory. This allows the breaker to be tripped remotely via a control signal.
What lugs are included with the MHL366001288?
This breaker includes AL900MA lugs. Each lug accepts three 3/0 AWG to 500 kcmil aluminum or copper conductors per phase.
Is the MHL366001288 compatible with I-Line panelboards?
No. This is a unit-mount, feed-thru circuit breaker designed to bolt directly to a backpan in switchboards, motor control centers, or standalone enclosures. It does not have the plug-on jaw connections required for I-Line busbars.
Does the MHL366001288 support direct current applications?
Yes, the thermal-magnetic trip unit is rated for use on 250VDC systems, providing up to 50kA interrupting capacity for DC loads.
Can the trip settings on the MHL366001288 be adjusted?
The thermal (long-time) protection is fixed at 600A, but the magnetic (instantaneous) trip function is adjustable to allow coordination with downstream devices and motor inrush currents.
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