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Eaton / Cutler-Hammer HMDL3450 Molded Case Circuit Breaker
- 450A
- 3 Pole
- Panel Mount
Eaton / Cutler-Hammer
HMDL3450
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
HMDL3450
Quantity
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Eaton / Cutler-Hammer HMDL3450 - 450A 3 Pole Molded Case Circuit Breaker
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Description
Operating as a critical safety component, the Eaton HMDL3450 is a 450A, 3-pole molded case circuit breaker. This Series C M-Frame device provides robust protection for industrial facilities. The breaker integrates into Eaton panelboards, switchboards, and motor control centers. Its panel-mount configuration supports reverse feeding, offering versatility for distribution networks. With a 65 kAIC rating at 480V, it safely clears severe faults. The fixed trip units deliver reliable LI protection.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | HMDL |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 25kA @ 250VDC |
| Frame Type | MDL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | Two 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, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Terminals |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, HACR Rated, Reverse Feed |
Product FAQs
7 answersWhat is the difference between the HMDL3450 and the standard MDL3450?
The HMDL3450 is the high-interrupting capacity version of the standard MDL3450. It provides a 65kAIC rating at 480VAC compared to the standard MDL rating of 50kAIC, while maintaining the exact same physical dimensions and mounting footprint.
Can the Eaton HMDL3450 replace an older Westinghouse HMDL3450?
Yes. Eaton acquired the Westinghouse distribution equipment division, and the modern Eaton Series C HMDL3450 is a direct, drop-in replacement for legacy Westinghouse breakers sharing the same catalog number.
What equipment is compatible with this M-Frame breaker?
This breaker is designed for installation in Eaton and Cutler-Hammer Series C panelboards, switchboards, and motor control centers that are configured to accept MDL-frame or M-Frame circuit breakers.
What are the standard lug wire size requirements for this breaker?
The standard factory lugs on this breaker accommodate two 1 AWG to 500 kcmil conductors per phase. The terminals are rated for use with both aluminum and copper wiring.
Are the trip settings adjustable on the HMDL3450?
No. This specific model features a thermal magnetic trip unit with fixed thermal and fixed magnetic settings. It does not offer field-adjustable trip dials for modifying the trip curve.
What protection functions are included in the LI trip unit?
The LI designation indicates Long-Time and Instantaneous protection. This provides standard thermal overload protection (Long-Time) to prevent overheating, alongside immediate short-circuit protection (Instantaneous) to clear severe faults.
Will this breaker fit in an older Cutler-Hammer Series C enclosure?
Yes, Eaton Series C breakers are fully backwards compatible with legacy Cutler-Hammer Series C enclosures and hardware designed for M-Frame breakers.
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