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Eaton / Cutler-Hammer HMDL3300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Panel Mount
Eaton / Cutler-Hammer
HMDL3300
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
HMDL3300
Quantity
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Eaton / Cutler-Hammer HMDL3300 - 300A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for demanding industrial environments, the Eaton HMDL3300 is a 300A, 3-pole molded case circuit breaker from the Series C family. It features a thermal magnetic trip unit with adjustable magnetic settings to handle complex loads. This M-Frame breaker installs into Eaton panelboards, switchboards, and motor control centers. It is HACR rated and reverse feed capable for versatile deployment. With a massive 100kAIC rating at 240VAC, it safely interrupts severe electrical faults.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HMDL3300 |
| Series | HMDL |
| Amperage | 300A |
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator |
|---|---|
| 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, Reverse Feed, Interchangeable Trip Unit, HACR Rated |
Product FAQs
6 answersWhat is the difference between the Eaton MDL3300 and HMDL3300?
The HMDL3300 is the high-interrupting version of the MDL3300. While the standard MDL3300 is rated for 50 kAIC at 480VAC, the HMDL3300 provides a higher interrupting capacity of 65 kAIC at 480VAC and 100 kAIC at 240VAC. Both share the same physical dimensions and Series C M-Frame footprint.
What are the standard replacement lugs for the HMDL3300?
The standard lug kit for this breaker is catalog number TA700MA1. These pressure-type terminals accept two 1 AWG to 500 kcmil aluminum or copper wires per phase.
Can the Eaton HMDL3300 be reverse fed?
Yes. Eaton Series C M-Frame thermal-magnetic circuit breakers, including the HMDL3300, do not have line and load restrictions and are suitable for reverse feed applications.
What enclosures and panels accept the HMDL3300?
This breaker is designed for use in Eaton Series C panelboards, switchboards, motor control centers, and busway applications that accommodate 3-pole M-Frame circuit breakers.
How does the trip unit on the HMDL3300 operate?
It features a thermal-magnetic trip unit with a fixed thermal element set at 300 amps for overload protection, and an adjustable magnetic element for short-circuit protection. The magnetic trip can be adjusted in the field to coordinate with downstream devices or handle motor inrush currents.
Can I field-install accessories on the HMDL3300?
Yes. The Series C M-Frame has internal accessory cavities that allow for the field installation of plug-in modules, such as shunt trips, auxiliary switches, and undervoltage releases.
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