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Eaton / Westinghouse MA3600S Molded Case Circuit Breaker
- 600A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
MA3600S
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
MA3600S
Quantity
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Eaton / Westinghouse MA3600S - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Delivering reliable overcurrent protection for legacy systems, the MA3600S is a 3-pole, 600A MCCB developed under the Westinghouse brand. A key feature is the Saf-T-Vue window, permitting electricians to visually inspect contacts. This unit mounts into older Westinghouse PRL4 panelboards and commercial switchboards. As a physical replacement for aging MA-frame breakers, it restores functionality to existing enclosures. It features a 42 kAIC rating at 240VAC.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | MA3600S-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) 3/0 AWG - 500 kcmil (Cu/Al) |
| 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 |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit |
Product FAQs
6 answersWhat equipment is the MA3600S designed to fit?
This M-frame breaker bolts directly into legacy Westinghouse PRL4 panelboards, commercial switchboards, and motor control centers, making it a direct physical replacement for aging infrastructure.
What does the S suffix in the MA3600S catalog number indicate?
The S designates the inclusion of the Saf-T-Vue window. This transparent cover allows personnel to visually verify the position of the internal contacts, providing an extra layer of safety during maintenance. Standard MA3600 breakers do not include this feature.
Is the Eaton MA3600S an exact replacement for an older Westinghouse MA3600S?
Yes. Following Eaton's acquisition of the Westinghouse distribution equipment line, the MA-frame breakers are manufactured to the exact same physical and electrical specifications, regardless of whether the label says Eaton, Cutler-Hammer, or Westinghouse.
Can the trip unit on the MA3600S be swapped out?
Yes, this breaker features an interchangeable trip unit design. This allows electricians to modify the trip rating in the field without replacing the entire breaker frame if application requirements change.
Is the trip curve adjustable on this breaker?
The thermal element for long-time protection is fixed, but the magnetic element for instantaneous short-circuit protection is adjustable. This allows for fine-tuning the trip response to coordinate with downstream devices.
Are the load-side lugs included with this breaker?
Yes, this unit includes pressure-type load-side lug terminals that accept two 3/0 AWG to 500 kcmil copper or aluminum conductors per phase.
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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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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.