Eaton / Cutler-Hammer HMA3500 Molded Case Circuit Breaker
- 500A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer HMA3500 - 500A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed for heavy-duty applications, this 3-pole 500A molded case circuit breaker from Eaton Cutler-Hammer offers robust overcurrent protection. The unit features an interchangeable thermal-magnetic trip mechanism with adjustable magnetic settings for precise coordination. It mounts into standard Westinghouse and Eaton panelboards, serving as a reliable component for commercial systems. With a 600VAC rating and 35kAIC at 480V, it easily handles demanding industrial power requirements.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HMA3500-R |
| Series | HMA |
| Amperage | 500A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse/Eaton Panelboards and Switchboards |
| 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 | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Interchangeable Trip Unit |
Product FAQs
8 answersWhich panelboards are compatible with the HMA3500 circuit breaker?
The HMA3500 is designed to bolt into legacy Westinghouse and Eaton panelboards, switchboards, and motor control centers, including the PRL4 series.
What is the trip adjustment range for the HMA3500?
This breaker features a fixed thermal long-time trip of 500 amps and an adjustable magnetic instantaneous trip that can be set between 3000 and 6000 amps.
What frame family does the HMA3500 belong to?
It belongs to the legacy Westinghouse M-Frame family. The HMA designation indicates it is the high-interrupting capacity version of the standard MA frame.
What type of terminals are included with the HMA3500?
The breaker comes equipped with copper pressure lugs on both the line and load sides for secure wire termination.
Can the HMA3500 be used in DC power systems?
Yes, in addition to its AC ratings, this breaker is rated for 250VDC applications with a 20kA interrupting capacity.
What is the Mark 75 designation on the HMA3500?
Mark 75 is a legacy branding used by Westinghouse and Cutler-Hammer to identify specific lines of high-interrupting molded case circuit breakers, which includes the HMA frame.
What does the LI trip function code mean on this breaker?
The LI code indicates the breaker provides Long-Time (thermal) and Instantaneous (magnetic) overcurrent protection, which is standard for general feeder and branch circuit applications.
Can the HMA3500 replace a standard MA3500 breaker?
Yes, the HMA3500 shares the same physical dimensions as the standard MA3500 but offers a higher interrupting capacity. It is a direct drop-in replacement for existing M-Frame installations in older Westinghouse gear.
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