Square D MHL36700-1212 Molded Case Circuit Breaker
- 700A
- 3 Pole
- Unit Mount
Square D
MHL36700-1212
Molded Case Circuit Breaker
Brand
Square D
SKU
MHL36700-1212
Quantity
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Square D MHL36700-1212 - 700A 3 Pole Molded Case Circuit Breaker
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Description
Integrating an auxiliary switch for remote status indication, this 700A M-frame breaker delivers dependable long-time and instantaneous protection. Built for unit-mount installations, the device secures into legacy Square D switchboards and industrial enclosures. Facilities looking to modernize can transition to the MJL36700 frame using the S29450 auxiliary component. Delivering a 65kAIC rating at 480VAC, the breaker handles substantial fault currents and includes AL900MA lugs.Specifications
| Brand | Square D |
|---|---|
| Part Number | MHL36700-1212 |
| Series | MHL |
| Amperage | 700A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 14kA @ 250VDC |
| Frame Type | MHL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers |
| 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, Alarm Switch |
|---|---|
| Accessories | Auxiliary Switch (1A/1B), Lugs (AL900MA) |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Non-Interchangeable Trip, Common Trip, Trip-Free Mechanism |
Product FAQs
8 answersWhat does the "-1212" suffix indicate on the MHL36700-1212 catalog number?
The "-1212" suffix means the breaker is equipped with a factory-installed 1A/1B auxiliary switch (one normally open and one normally closed contact) used for remote status signaling.
What enclosures or panels are compatible with the MHL36700-1212?
As an M-Frame legacy molded case circuit breaker, it is designed for unit-mount (feed-thru) installation in compatible Square D switchboards and motor control centers.
How many conductors can the lugs on the MHL36700-1212 accommodate?
The standard mechanical lugs on this 700A breaker accept three conductors per phase, accommodating wire sizes from 3/0 AWG up to 500 kcmil for both copper and aluminum wiring.
Are the trip settings on the MHL36700-1212 adjustable?
The thermal (Long-Time) protection is fixed, but the magnetic (Instantaneous) trip function is adjustable, allowing you to fine-tune the short-circuit response for your specific load.
Is the MHL36700-1212 suitable for ungrounded DC systems?
It is rated for DC applications up to 250VDC with a 14kA interrupting rating. However, you must verify specific wiring configurations, such as wiring poles in series, required by Square D for your specific DC system voltage to ensure safe operation.
Is the MHL36700-1212 a current production breaker?
The MHL frame is part of Square D's legacy MCCB family. While it has been superseded by PowerPact M-Frame breakers in many modern applications, it remains a direct replacement for existing M-Frame switchboard installations.
What does the "LI" trip function code mean on this breaker?
The "LI" designation indicates that the thermal-magnetic trip unit provides Long-Time (L) overload protection and Instantaneous (I) short-circuit protection.
What is the difference between the MHL and MAL frames?
Both are Square D legacy M-Frame breakers with identical physical dimensions and mounting. The difference lies in the interrupting capacity; the MHL is the high-interrupting version (65kA at 480V), whereas the MAL has a standard interrupting rating.
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