Square D MHL36700-1021 Molded Case Circuit Breaker
- 700A
- 3 Pole
- Unit Mount
Quantity
Square D MHL36700-1021 - 700A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for heavy-duty industrial applications, this 700A M-frame breaker provides robust long-time and instantaneous (LI) trip functions. The unit features a factory-installed shunt trip for remote operation. Designed for unit-mount configurations, it installs into compatible Square D switchboards and motor control centers. For modern upgrades, this legacy component is replaced by the MJL36700. Rated for 65kA at 480VAC, the device ensures high interrupting capacity for demanding systems.Specifications
| Brand | Square D |
|---|---|
| Part Number | MHL36700-1021 |
| Series | MHL |
| Amperage | 700A |
| 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 | Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Line and Load Lugs Included |
| 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 | High Interrupting Capacity, HACR Rated |
Product FAQs
5 answersHow many conductors per phase can the MHL36700-1021 lugs accommodate?
The factory-installed line and load side lugs accept three conductors per phase. They are compatible with 3/0 AWG to 500 kcmil aluminum or copper wire.
Where is the MHL36700-1021 typically installed?
This 700A unit mount breaker is engineered for heavy industrial applications. It is compatible with Square D switchboards, motor control centers, and large industrial enclosures.
How does the trip unit on the MHL36700-1021 operate?
It utilizes a non-interchangeable thermal magnetic trip unit with fixed thermal and adjustable magnetic settings. This LI (Long Time, Instantaneous) configuration allows electricians to fine-tune the instantaneous short circuit response while maintaining a fixed overload threshold.
Is the MHL36700-1021 a current production model?
This breaker belongs to the legacy Square D M-Frame series. While Schneider Electric has transitioned to the newer PowerPact M-Frame line, exact legacy replacements are often sourced to service existing switchboards without requiring costly retrofits or busbar modifications.
What safety precautions are required when servicing the MHL36700-1021?
Due to the high fault current capabilities, such as 65kA at 480V, servicing must be performed by qualified personnel wearing appropriate arc flash PPE. Always verify the circuit is de-energized before adjusting the magnetic trip settings or inspecting the feed-thru lug connections.
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