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Eaton / Westinghouse MA3600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
MA3600
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
MA3600
Quantity
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Eaton / Westinghouse MA3600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
The MA3600 is a legacy 600A molded case circuit breaker originally manufactured by Westinghouse. It provides reliable thermal-magnetic protection for commercial applications. This 3-pole breaker installs into vintage Westinghouse PRL4 panelboards and switchboards. It serves as an exact drop-in replacement for aging MA-frame breakers, bypassing the need for retrofit kits. It is replaced by the MDL3600. Rated at 42 kAIC at 240VAC, this bolt-on MCCB delivers robust fault interruption.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | MA3600-R |
| Series | MA |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse PRL4 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | (2) 1 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 1 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 |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit |
Product FAQs
7 answersWhat is the modern Eaton cross-reference for the Westinghouse MA3600?
Eaton acquired the Westinghouse distribution equipment line and replaced the legacy MA frame with the Series C MDL frame. The direct modern replacement for this breaker is the Eaton MDL3600.
Will the MA3600 fit in my existing Westinghouse switchboard?
Yes, this breaker is an exact drop-in replacement for aging MA-frame breakers in vintage Westinghouse PRL4 panelboards, switchboards, and motor control centers. It installs without the need for custom retrofit kits.
What are the lug wire size requirements for this breaker?
The standard load side lugs accept two conductors per phase. They are rated for 1 AWG to 500 kcmil aluminum or copper wire.
Can this breaker be used in direct current (DC) systems?
Yes, the MA3600 is rated for 250VDC applications with a 10kA interrupting capacity, in addition to its standard AC voltage ratings up to 600VAC.
Are the trip settings adjustable on the MA3600?
The thermal-magnetic trip unit features a fixed thermal element for Long-Time overload protection and an adjustable magnetic element for Instantaneous short-circuit protection.
Is the trip unit on the MA3600 interchangeable?
Yes, the MA3600 features an interchangeable trip unit design. This allows electricians to swap trip units if the load requirements change without replacing the entire breaker frame.
How does the MA3600 mount into the panel?
This is a bolt-on molded case circuit breaker designed to bolt directly to the busbars in compatible Westinghouse enclosures.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
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.