Eaton / Cutler-Hammer MDLB3800T33W Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Quantity
Eaton / Cutler-Hammer MDLB3800T33W - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed to support commercial power systems, this 800A molded case circuit breaker provides robust electronic trip capabilities. It mounts into Eaton Series C switchboards and motor control centers, requiring separate lugs and rating plugs for installation. The breaker features a non-interchangeable Digitrip 310 unit with configurable long-time and short-time (LS) functions. While this specific model has been replaced by the MDLB3800FT33W, it remains fully compatible with existing MDL frames.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | MDLB3800T33W |
| Series | MDL |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LS |
| Trip Function | Long-Time, Short-Time |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lugs, Rating Plugs |
|---|---|
| Accessories | Lugs Not Included, Rating Plug Not Included |
| Standards | HACR Rated, UL 489, CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | Digitrip 310 Trip Unit, Factory Sealed, Non-Interchangeable Trip, Reverse Feed, HACR Rated |
Product FAQs
6 answersCan I install the MDLB3800T33W in older Cutler-Hammer enclosures?
Yes, this M-Frame breaker is fully compatible with legacy Cutler-Hammer and current Eaton Series C panelboards, switchboards, and motor control centers.
What specific protection parameters can be adjusted on the T33W trip unit?
The LS designation indicates an electronic trip unit with adjustable Long-Time (pickup and delay) for overload conditions, and Short-Time (pickup and delay) for short-circuit coordination.
Does the MDLB3800T33W include integrated ground fault protection?
No. Because it is equipped with an LS trip unit, it only provides Long-Time and Short-Time protection. If your application requires ground fault monitoring, you will need an LSG or LSIG trip unit instead.
Does the MDLB3800T33W plug directly onto panelboard busbars?
No, this is a unit mount, bolt-on circuit breaker. It must be mechanically bolted to the chassis or mounting pan and wired using the included lug terminals.
Can this M-Frame breaker be used in DC applications?
Yes. While primarily used in AC systems up to 600VAC, the MDLB3800T33W is also rated for 250VDC systems, providing a 22kA interrupting capacity for industrial DC circuits.
How does the interrupting capacity of the MDLB3800T33W change with system voltage?
The maximum fault current rating depends on your operating voltage. It provides 65kAIC at 240VAC, 50kAIC at 480VAC, and 25kAIC at 600VAC. Always verify the available fault current at your specific installation voltage.
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