Eaton / Cutler-Hammer LGH3300FAG Molded Case Circuit Breaker
- 300A
- 3 Pole
- Unit Mount
Quantity
Eaton / Cutler-Hammer LGH3300FAG - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for industrial distribution, the Eaton LGH3300FAG is a 3-pole, 300A molded case circuit breaker from the Series G family. It installs into compatible Eaton panelboards, switchboards, and motor control centers. The LG-frame design features a fixed thermal and adjustable magnetic trip unit for precise LI protection. With a high interrupting rating of 65 kAIC at 480VAC, it provides robust fault clearing for commercial applications. Includes factory-installed line and load lugs.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LGH3300FAG |
| Series | LGH |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 42kA @ 250VDC |
| Frame Type | LGH |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series G Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 3 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3 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 |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
8 answersWhat does the FAG suffix mean in the LGH3300FAG catalog number?
In the Eaton Series G nomenclature, F indicates a fixed thermal trip, A stands for an adjustable magnetic trip, and G means the breaker comes with standard line and load lugs factory-installed.
Is the LGH3300FAG a standard 80% rated or 100% rated circuit breaker?
This breaker is standard 80% rated. In the Eaton Series G catalog system, 100% rated breakers include a C suffix at the end of the part number (e.g., LGH3300FAGC).
What is the advantage of the adjustable magnetic trip on this breaker?
The adjustable magnetic element allows you to tune the instantaneous short-circuit pickup level. This is particularly useful for preventing nuisance tripping from high inrush currents, such as those generated when starting large motors, and for improving selective coordination with downstream breakers.
Does this breaker provide ground fault protection?
No, the LGH3300FAG features a thermal-magnetic trip unit with LI (Long-Time and Instantaneous) functions only. If you require ground fault protection, you will need an LG-frame breaker equipped with an electronic LSIG trip unit.
Can I use the LGH3300FAG to replace an older Westinghouse L-frame breaker?
While Eaton Series G LG-frame breakers share a similar footprint to legacy Westinghouse and Cutler-Hammer L-frame breakers, you must verify the specific panelboard or switchboard mounting hardware. Upgrading from older series often requires a retrofit kit or specific Series G mounting brackets.
How does the LGH frame differ from LGE or LGS frames?
The difference lies in the interrupting capacity (AIC rating). The LGH is the high-interrupting tier, rated at 65 kAIC at 480 VAC. The LGE is standard (35 kAIC at 480 VAC), and the LGS is intermediate (50 kAIC at 480 VAC). They share the same physical dimensions and accept the same accessories.
Can I add field-installable accessories like a shunt trip or auxiliary switch to this breaker?
Yes, Eaton Series G LG-frame breakers support a variety of internal accessories. These are typically installed under the front cover, allowing you to add shunt trips, undervoltage releases, or auxiliary contacts in the field.
Is the LGH3300FAG suitable for use in HVAC applications?
Yes, Eaton LG-frame molded case circuit breakers are HACR rated, meaning they are approved for use with heating, air conditioning, and refrigeration equipment.
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