LS Contactor MC-9A

Description

Product DescriptionThe LS Electric Metasol MC-9a is a compact, industrial-grade 3-pole magnetic contactor designed for reliable switching, control, and protection of electric motors and electrical distribution systems. As part of the highly regarded Metasol series, this electromagnetic switch is optimized for space-saving DIN-rail or screw mounting within control panels and electrical enclosures.Featuring advanced arc-extinguishing technology and high-durability silver alloy contacts, the MC-9a delivers a long operational lifespan under heavy cycling. It features built-in auxiliary contact arrangements to easily interface with control circuits, pilot lights, or programmable logic controllers (PLCs). Its modular design allows for effortless, snap-on installation of accessories like overload relays and auxiliary contact blocks.Technical SpecificationsBrand: LS Electric (formerly LG Industrial Systems)Model Series: Metasol (MC Series)Model Number: MC-9a (often designated as MC9A-30-10)Number of Poles: 3-Pole (3NO main power contacts)Current Rating (AC-3): 9 Amps (at up to 440V AC)Power Rating: 4 kW at 380V/400V ACContinuous Current ($I_{th}$): 25 Amps (AC-1 non-inductive load)Standard Built-in Auxiliary Contact: 1NO (Normally Open) or 1NC (Normally Closed) variant configurationAvailable Control Coil Voltages: 24VAC, 110VAC, 220V–240VAC, or 24VDC (varies by specific SKU suffix)Model Variations & Direct ReplacementsThe MC-9a sits within a standardized family of compact electrical control components. Depending on your enclosure space and terminal layouts, its companion models and historical equivalents include:LS MC-9b: The close sibling model. While both are rated for 9A, the “b” variant typically features a slightly different body profile or dual-auxiliary contact layouts (1NO + 1NC) compared to the single-auxiliary layout of the standard “a” model.LS GMC-9: The direct legacy/predecessor model from the older LG Industrial Systems line. The MC-9a/MC-9b serves as its modern, drop-in catalog replacement.Sized Step-Ups: Directly shares the same physical frame size and footprint as the MC-12a (12A) and MC-18a (18A), making system amperage upgrades straightforward.Compatible Accessories & ProductsThe MC-9a is designed to integrate into standard industrial motor starter configurations and is fully compatible with the following components:Overload Relays: Pairs seamlessly with the LS MT-32 series thermal overload relays (e.g., MT-32/3H) to create a fully protected, manual or automatic-reset motor starter assembly.Auxiliary Contact Blocks: Expandable via top-mounted or side-mounted front auxiliary contact blocks (such as the UA-2 or UA-4 series) to add up to 4 additional signaling poles.Interlock Units: Compatible with the UR-02 mechanical interlock unit for configuring reversing motor starters.Target Applications: Extensively used to switch small 3-phase AC motors, industrial ventilation fans, water pumps, commercial lighting arrays, and heavy-duty HVAC compressor circuits.