Square D MHP36600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Bolt-On
Square D
MHP36600
Molded Case Circuit Breaker
Brand
Square D
SKU
MHP36600
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Square D MHP36600 - 600A 3 Pole Molded Case Circuit Breaker
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600A 3 Pole Molded Case Circuit Breaker
600A 3 Pole Molded Case Circuit Breaker
Description
Engineered for commercial power distribution, the Square D MHP36600 is a 600A, 3-pole molded case circuit breaker. This M-Frame unit provides reliable thermal-magnetic protection with long-time and instantaneous (LI) trip functions. Designed for bolt-on mounting, it installs into compatible Square D switchboards and panelboards. This legacy breaker is officially replaced by the MJA36600. Rated for 65kAIC at 480VAC, it handles demanding high-interrupting applications and is HACR rated.Specifications
| Brand | Square D |
|---|---|
| Series | MHP |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 25kA @ 600VAC, 14kA @ 250VDC |
| Frame Type | MHP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Panelboards |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs (Load Side) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489, W-C-375B/GEN |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Non-Interchangeable Trip |
Product FAQs
6 answersIs the MHP36600 circuit breaker still in active production?
The MHP36600 is a legacy Square D M-frame breaker and is no longer manufactured. It has been superseded by the newer PowerPact series. For direct replacements, electricians typically use PowerPact M-frame or P-frame unit-mount breakers, depending on the specific switchboard configuration.
What type of panelboards are compatible with the MHP36600?
This bolt-on circuit breaker is designed exclusively for legacy Square D switchboards and panelboards configured for unit-mount M-frame breakers. It is not compatible with I-Line plug-on distribution panels.
How does the adjustable magnetic trip function work on this breaker?
The MHP36600 features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element. The adjustable magnetic dial allows panel builders to set the instantaneous short-circuit response threshold, ensuring proper selective coordination with downstream devices.
Is the MHP36600 suitable for direct current (DC) systems?
Yes. While primarily used in AC switchboards up to 600VAC, the thermal-magnetic trip unit in the MHP36600 is also rated for 250VDC systems. It provides a 14kA interrupting capacity for industrial DC control circuits or battery backup applications.
What are the lug wire size requirements for installing the MHP36600?
The standard lugs accommodate three cables per phase. You can use either aluminum or copper (Al/Cu) conductors sized between 3/0 AWG and 500 kcmil. Always apply the manufacturer-specified torque during installation to prevent terminal overheating.
Can I add a shunt trip or auxiliary switch to the MHP36600?
Yes, legacy Square D M-frame breakers support internal accessories including shunt trips, undervoltage releases, alarm switches, and auxiliary contacts. These accessories are typically mounted internally and should be installed following standard Square D procedures.
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