Eaton / Cutler-Hammer HFDDC3040L Molded Case Circuit Breaker
- 40A
- 3 Pole
- Panel Mount
Quantity
Eaton / Cutler-Hammer HFDDC3040L - 40A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for demanding industrial and solar/PV applications, the Eaton HFDDC3040L operates as a 40A, 3-pole molded case circuit breaker. It belongs to the proven Series C F-Frame lineup, offering fixed thermal and magnetic trip units for precise LI protection. The breaker mounts into compatible Eaton panelboards, switchboards, and solar combiner boxes. With a high interrupting capacity of 42kA at 600VAC and robust DC ratings, it ensures reliable performance in commercial photovoltaic systems.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HFDDC3040L |
| Series | HFDDC |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 600VAC, 250VDC, 600VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 600VAC, 42kA @ 250VDC, 42kA @ 600VDC |
| Frame Type | HFDDC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Solar Combiner Boxes |
| Wire Gauge | 14 AWG - 1/0 AWG |
| Max Wire | 1/0 AWG |
| Min Wire | 14 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, Padlock Attachment |
|---|---|
| Accessories | Line and Load Terminals |
| Standards | UL 489, UL 489B |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | DC Rated, Photovoltaic Rated, HACR Rated, High Interrupting Capacity |
Product FAQs
7 answersWhat types of systems is the Eaton HFDDC3040L designed to protect?
The HFDDC3040L is a PvGard DC-rated circuit breaker engineered specifically for solar photovoltaic (PV) installations, battery storage, and commercial DC distribution. It mounts directly into Eaton Series C panelboards, switchboards, and solar combiner boxes.
How does the HFDDC3040L handle high-voltage DC applications?
This breaker is rated for up to 600VDC with a 42kA interrupting capacity. Depending on the system voltage and grounding configuration, multiple poles must be wired in series to safely interrupt the fault current according to Eaton's DC wiring guidelines.
Are the line and load terminals included with the HFDDC3040L?
Yes, the L suffix in the catalog number indicates that this breaker ships with factory-installed line and load lugs. These standard lugs accept wire gauges from 14 AWG to 1/0 AWG.
Can I field-install internal accessories like a shunt trip in this F-Frame breaker?
Eaton Series C F-Frame circuit breakers are factory sealed. To maintain the UL 489 listing, internal accessories like shunt trips or auxiliary switches must be installed at the factory. Field installation of internal accessories voids the UL listing.
What is the difference between the HFDDC3040L and the HFDDC3040W?
Both are 40A, 3-pole DC-rated F-Frame breakers. The HFDDC3040L includes factory-installed line and load lug terminals, while the HFDDC3040W is supplied without terminals so panel builders can install custom lug kits.
How should the HFDDC3040L be wired in DC systems?
When applying this breaker in DC systems, multiple poles may need to be wired in series depending on the voltage and whether the system is grounded or ungrounded. For grounded systems, the interruption rating is based on the number of poles in series breaking the ungrounded leg. Always follow Eaton's F-Frame DC wiring diagrams for proper configuration.
Can I adjust the trip settings on the HFDDC3040L?
No, this breaker is equipped with a fixed thermal and fixed magnetic trip unit. It provides reliable Long-Time and Instantaneous (LI) overcurrent protection, but the trip thresholds are factory-set and cannot be modified in the field.
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