1 Year Warranty
Description
Eaton MC2-442-57CQB-1-2A Molded Case Circuit Breaker (MCCB)
Product Overview
The Eaton MC2-442-57CQB-1-2A is a three-pole, thermal-magnetic molded case circuit breaker (MCCB) from Eaton’s Moeller (NZM) series or a closely related line. This breaker is designed to provide reliable overload and short-circuit protection for electrical circuits in industrial, commercial, and infrastructure applications. The comprehensive part number provides specific details about its frame size, interrupting capacity, current rating, trip unit type, and auxiliary features.
As a member of the “MC2” or similar series, it features a robust molded case housing the operating mechanism, contacts, arc chute, and trip unit. The “-1-2A” suffix often indicates specific factory-installed options or configurations. This breaker functions as a manually operated disconnect switch and an automatic protection device, capable of interrupting fault currents safely and isolating circuits for maintenance.
Technical Specifications (Decoded from Part Number)
Summarized Key Specs (Based on Common Interpretation):
-
Manufacturer: Eaton
-
Type: Molded Case Circuit Breaker (MCCB)
-
Poles: 3-Pole (3P)
-
Rated Current (In): 57A
-
Tripping Characteristic: C Curve (Magnetic trip: 5-10 x In)
-
Rated Operational Voltage (Ue): Likely 415V / 480V AC, 50/60 Hz (Confirm from nameplate).
-
Breaking Capacity (Icu): Determined by frame size
442(e.g., 42kA, 50kA). Crucial to verify from official data. -
Optional Features: Likely includes 1NO+1NC auxiliary contacts (due to
-1).
XVS-440-10MPI-1-1U
Main Features and Advantages
-
Compact and Robust Design: Provides high breaking capacity in a relatively compact form factor, saving panel space.
-
Thermal-Magnetic Protection: Offers reliable, time-delayed protection against overloads (thermal element) and instantaneous protection against short-circuits (magnetic element).
-
C Curve Versatility: The “C” characteristic offers a balance between inrush tolerance and short-circuit sensitivity, making it suitable for a wide range of applications including circuits with small motors, transformers, and general distribution.
-
Factory-Installed Options: The inclusion of internal accessories (like auxiliary contacts) simplifies panel design and wiring, as they are integrated and tested at the factory.
-
Safety and Compliance: Designed to meet international standards (IEC/EN 60947-2), ensuring safe operation and interruption of fault currents.
Application Fields
The Eaton MC2-442-57CQB-1-2A MCCB is suitable for protecting three-phase circuits in various settings:
-
Industrial Control Panels: As a main incoming feeder or sub-feeder breaker for machine tools, conveyor systems, and assembly lines.
-
Commercial Buildings: Distribution board protection for lighting, HVAC, and receptacle circuits.
-
Power Distribution: Protecting branch circuits in motor control centers (MCCs) and panelboards.
-
Equipment Protection: As a dedicated disconnect and protection device for pumps, fans, compressors, and other three-phase loads with moderate starting currents.
Related Products & Accessories
-
Mounting Base / Adapter Plate: For easy installation and mounting.
-
External Rotary Handle Kit: Allows for door mounting and operation from outside the enclosure.
-
Padlockable Handle: For safety lockout/tagout (LOTO) procedures.
-
Additional Auxiliary Contacts: If not already included, additional contact blocks can often be added externally.
-
Shunt Trip (STR) / Undervoltage Release (UVR): For remote tripping or automatic trip on power loss (may be factory-installed per
-1code). -
Terminal Covers / Shields: For added safety and touch protection.
