Square D MA31000F Molded Case Circuit Breaker
- 1000A
- 3 Pole
- Unit Mount
Quantity
Square D MA31000F - 1000A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
A direct replacement for older installations, the MA31000F is a 3-pole, 1000A molded case circuit breaker from Square D's M-Frame series. Built for industrial applications, it provides reliable overcurrent protection for high-capacity systems. This unit-mount breaker installs via busbar connections into compatible Square D switchboards and motor control centers. It features a thermal-magnetic trip unit with adjustable magnetic settings, a Visi-Trip indicator, and a 42kAIC rating at 240VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | MA31000F-R |
| Series | MA |
| Amperage | 1000A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 14kA @ 250VDC |
| Terminal Type | Busbar Connection |
|---|---|
| For Use With | Square D Switchboards, Motor Control Centers |
| 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 Not Included, Terminal Nut Kit |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
Product FAQs
8 answersWhat does the F suffix mean in the MA31000F catalog number?
The F indicates that this breaker is supplied without lugs. It is configured for a direct busbar connection and requires a separate terminal nut kit if you intend to install cable lugs.
How does the MA31000F mount into an enclosure?
This is a unit mount circuit breaker designed to be bolted directly to the busbar. It is not compatible with I-Line panelboards, which require plug-on style breakers like the standard MA31000.
What are the trip unit capabilities of this 1000A breaker?
The MA31000F utilizes a thermal magnetic trip unit with a fixed thermal (long-time) setting and an adjustable magnetic (instantaneous) setting. This allows electricians to fine-tune the short-circuit protection for specific motor control center or switchboard loads.
Can the MA31000F be installed in direct current (DC) systems?
Yes, in addition to its AC ratings, this breaker is certified for DC applications up to 250VDC, providing an interrupting capacity of 14kA at that voltage.
What is the maximum interrupting capacity for the MA31000F?
The breaker delivers a maximum short-circuit current rating of 42kA at 240VAC. For higher voltage systems, it provides 30kA at 480VAC and 22kA at 600VAC.
What is the modern replacement for the legacy MA31000F?
Square D has transitioned legacy 1000A M-Frame breakers to the newer PowerPacT P-Frame series, such as the PGA36100. When upgrading, verify your enclosure dimensions and mounting hardware, as the PowerPacT footprint differs from the legacy MA frame.
What equipment is the MA31000F designed to protect?
This 3 pole, 1000A breaker is engineered for heavy commercial and industrial applications. It is specifically designed for use in Square D switchboards and motor control centers that accept unit mount M-Frame breakers.
Does the MA31000F include a visual trip indicator?
Yes, this breaker features Square D Visi-Trip technology. When the breaker trips due to an overcurrent or short-circuit event, the handle snaps to a midpoint position and a highly visible red indicator appears, allowing for rapid fault identification in crowded switchboards.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- DHDave H.ReviewingSquare D MA36600 - 600A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/6/25Never had a problem
We like the service and the prices. The re-certified are great for projects that we have in house.