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Square D MHL36600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Unit Mount
Square D
MHL36600
Molded Case Circuit Breaker
Brand
Square D
SKU
MHL36600
Quantity
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Square D MHL36600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
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Square D MHL36600 - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | MHL36600 |
| 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 | MHL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Switchboards, Motor Control Centers, Industrial 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 | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs (AL900MA) |
| 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 |
Quantity
Square D MHL36600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | MHL36600-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 | MHL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Switchboards, Motor Control Centers, Industrial 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 | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs (AL900MA) |
| 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 |
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Description
Rated for 65 kAIC at 480V, this unit-mount molded case circuit breaker handles demanding industrial power distribution tasks. The thermal-magnetic trip mechanism features fixed thermal and adjustable magnetic settings to fine-tune short-circuit protection. Unlike I-Line variants, this model bolts into switchboards, motor control centers, and custom enclosures using standard lug connections. Facilities looking to upgrade can substitute this legacy component with the MJL36600.Specifications
| Brand | Square D |
|---|---|
| Part Number | MHL36600-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 | MHL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Switchboards, Motor Control Centers, Industrial 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 | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs (AL900MA) |
| 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
5 answersCan I install the MHL36600 in an I-Line panelboard?
No. The MHL36600 is a unit-mount (feed-thru) circuit breaker designed to be bolted into switchboards, motor control centers, and custom enclosures using standard lugs. It does not have the jaw-style plug-on connections required for I-Line panelboards.
Is the MHL36600 still manufactured, or is there a direct replacement?
The Square D MHL36600 is a legacy M-Frame breaker that has been superseded by the newer PowerPact M-Frame series. Facilities upgrading their equipment typically replace this unit with the PowerPact MJL36600, though minor physical footprint differences may require modifications to the mounting hardware or enclosure space.
What wire range do the standard lugs on the MHL36600 accommodate?
The standard factory lugs accept three 3/0 AWG to 500 kcmil aluminum or copper (Al/Cu) conductors per phase. Because this is a feed-thru breaker, these lug connections are utilized on both the line and load sides.
Is the trip unit on the MHL36600 adjustable?
The MHL36600 features a thermal-magnetic trip unit with a fixed long-time thermal element and an adjustable instantaneous magnetic element. This allows electricians to fine-tune the short-circuit trip threshold based on the specific load without altering the baseline 600A continuous overload rating.
Is the MHL36600 rated for HVAC applications?
Yes, this breaker is HACR rated, making it suitable and safely certified for group motor applications in heating, air conditioning, and refrigeration equipment. It also carries standard UL 489, CSA, and IEC approvals for molded case circuit breakers.
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