Unbranded 3-Pole Molded Case Circuit Breaker Heavy Duty Industrial MCCB

Unbranded 3-Pole Molded Case Circuit Breaker Heavy Duty Industrial MCCB

This is a heavy-duty 3-pole molded case circuit breaker (MCCB) of unknown manufacture, pulled from an industrial environment. Molded case circuit breakers are used in panelboards, switchboards, and motor control centers to provide overcurrent and short-circuit protection for electrical distribution systems. The brand and trip current rating on this unit are not legible from the available labels — buyers should inspect all photos carefully and verify suitability before purchasing.

Specifications & What's Included

• Type: Molded Case Circuit Breaker (MCCB)
• Number of Poles: 3
• Trip Current: Unknown — rating label not legible; see photos
• Brand / Manufacturer: Unidentified (no legible logo or brand marking)
• Trip Mechanism: Appears to be thermal-magnetic; three sets of Lo/Hi trip adjustment screws are visible on the line-side face
• Trip Indicator: Red push-to-reset button present on top face
• Terminal Style: Bolt-lug type on both line and load sides
• Load-side terminals: Three large lug openings; show minor oxidation on copper contact surfaces
• Toggle handle: Present and intact
• Mounting: Panel/bolt-on style

Applications

Molded case circuit breakers like this one are a standard component in industrial and commercial electrical distribution. They are installed in panelboards, load centers, switchboards, and motor control centers to protect branch circuits, feeders, and motors from damage caused by overcurrent and short-circuit faults. Three-pole MCCBs are used in three-phase AC distribution systems — common in manufacturing plants, industrial facilities, commercial buildings, and utility service equipment. Adjustable-trip versions (like this unit appears to be, based on the Lo/Hi adjustment screws) allow the trip threshold to be set within a defined range, making them useful for motor branch circuit protection where inrush current must be accommodated without nuisance tripping. Because the trip rating on this unit is not confirmed, it is well suited for buyers who can verify the rating independently or who are sourcing it for testing, repair, or parts.