Square D MAP26600 Molded Case Circuit Breaker
- 600A
- 2 Pole
- Bolt-On
Quantity
Square D MAP26600 - 600A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Rated for 600A, this MAP-frame molded case circuit breaker is built to handle demanding commercial and industrial electrical systems. It delivers dependable thermal-magnetic protection with long-time and instantaneous trip capabilities. Designed for seamless integration, the breaker mounts into Square D I-Line panelboards and switchboards. It serves effectively as a vertical main with its secure bolt-on design.Specifications
| Brand | Square D |
|---|---|
| Series | MAP |
| Amperage | 600A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480Y/277VAC, 30kA @ 480VAC, 22kA @ 600Y/347VAC, 22kA @ 600VAC, 14kA @ 250VDC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards (Vertical Main), Switchboards |
| 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 | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, Non-Interchangeable Trip |
Product FAQs
8 answersWhat equipment is the MAP26600 circuit breaker compatible with?
This breaker is designed for use in Square D switchboards and as a vertical main in I-Line panelboards. It is a unit-mount, bolt-on breaker and is not compatible with standard plug-on I-Line branch spaces or residential load centers.
How many conductors do the factory lugs on the MAP26600 accept?
The standard mechanical lugs are designed to accept three parallel conductors per phase. Each terminal accommodates aluminum or copper wire ranging from 3/0 AWG to 500 kcmil.
How does the adjustable magnetic trip function operate on this breaker?
The MAP26600 features a thermal-magnetic trip unit with a fixed thermal element for overload protection and an adjustable magnetic element. The adjustable magnetic setting allows electricians to tune the instantaneous short-circuit trip point to coordinate with specific load inrush currents, preventing nuisance tripping.
Is the Square D MAP frame still manufactured for new installations?
The MAP series is a legacy M-frame molded case circuit breaker. While it is still sourced for direct replacements in existing switchboards and motor control centers, modern Square D installations typically utilize the newer PowerPacT M-frame series.
Why is proper torque critical when terminating the 3/0 AWG to 500 kcmil conductors on this breaker?
Under-torqued lugs can lead to high resistance, localized heating, and thermal damage, while over-torquing can deform the conductors or strip the lug threads. Always use a calibrated torque wrench and follow the manufacturer specifications printed on the breaker faceplate to ensure a safe, code-compliant connection.
Can the MAP26600 be utilized in direct current (DC) systems?
Yes, in addition to its AC ratings, this breaker is rated for use in DC applications up to 250VDC, where it provides an interrupting rating of 14kA.
Can I use the MAP26600 as a branch breaker in an I-Line panelboard?
No. While it is compatible with I-Line panelboards, it is specifically configured as a vertical main breaker. It features a bolt-on connection rather than the plug-on jaw configuration required for I-Line branch mounting.
What does the M-frame designation indicate for the MAP26600?
The M-frame designation refers to the standardized physical dimensions of the breaker housing. All Square D legacy M-frame breakers share the same footprint and mounting hole patterns, allowing for straightforward physical replacement within compatible switchboards regardless of the specific amperage rating.
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