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Eaton / Cutler-Hammer HMDL3400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Panel Mount
Eaton / Cutler-Hammer
HMDL3400
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
HMDL3400
Quantity
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Eaton / Cutler-Hammer HMDL3400 - 400A 3 Pole Molded Case Circuit Breaker
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Description
Belonging to the Series C lineup, the Eaton HMDL3400 is a 400A, 3-pole molded case circuit breaker. The M-Frame architecture delivers consistent performance in industrial environments. Designed for panel-mount applications, it fits Eaton panelboards, switchboards, and motor control centers. It accommodates reverse feed setups and standard lug connections. With a 65 kAIC rating at 480V, it handles high fault currents.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | HMDL |
| Amperage | 400A |
| 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
5 answersWhat is the difference between the standard MDL3400 and the HMDL3400?
The HMDL3400 is the high-interrupting version of the M-Frame breaker [1.2.9]. It provides an elevated interrupting capacity of 65kA at 480VAC, compared to the standard MDL3400 which is rated for 50kA at 480VAC.
Which enclosures are compatible with the HMDL3400 breaker?
This MDL-frame breaker is designed for direct installation in Eaton and Cutler-Hammer Series C panelboards, switchboards, and motor control centers.
What size wire is required for the lugs on the HMDL3400?
The standard mechanical lugs on this feed-thru breaker accept two 1 AWG to 500 kcmil aluminum or copper conductors per phase.
What do the LI trip functions mean on this breaker?
The LI designation indicates the thermal-magnetic trip unit provides Long-Time (L) overload protection and Instantaneous (I) short-circuit protection. The thermal element for long-time protection is fixed, while the instantaneous magnetic response is adjustable via a dial on the front faceplate.
Can the Eaton HMDL3400 be reverse fed?
Yes, this thermal-magnetic molded case circuit breaker is suitable for reverse-feed applications, allowing it to be wired with power entering from either the top or bottom terminals.
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