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Molded Case Circuit Breaker Manufacturer in China

Get Direct Factory Pricing from Delixi and Tengen's Verified Supplier

Backed by nearly 30 years of industry experience, our MCCBs deliver reliable performance and flexible solutions for industrial and commercial projects.

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A glass cupboard showcasing a variety of Molded Case Circuit Breakers (MCCBs) arranged on multiple shelves. The breakers, in white, black, and red casings with colorful switches (green, red, blue, and pink), are neatly organized, reflecting a range of models and sizes. The background features a clean indoor setting with soft lighting, highlighting the electrical components.

Our MCCB Categories

MCCB CKD/SKD Support

Simplified Assembly Support

Assembly shouldn’t be a barrier. We understand the process can feel tricky, so we offer support to make it effortless.

We can pre-assemble your MCCBs up to the final step. You just need to simply attach the cover and run basic testing.

If you need testing equipment, we can help you source the best equipments relying on our years’ local network.

  • Three MCCB parts laid out on a wooden surface: left - gray front cover with handle and red indicator; middle - bottom half of the cover marked LINE and LOAD (combines with left piece to form the complete cover); right - fully assembled internal mechanism with contacts, arc chutes, and terminals, typical SKD setup ready for final customer assembly.
  • A rolling metal rack with multiple shelves holding trays of nearly finished MCCB SKD (semi-knocked down) units. Each unit is fully assembled with internal mechanisms, contacts, trip units, and terminals exposed, ready for customers to attach the front covers and complete the breakers.
  • MCCBs in SKD (semi-knocked down) form without front covers, securely packed in a cardboard box with foam inserts. The internal mechanisms, silver operating handles, arc chutes, and red trip indicators are fully assembled and visible, ready for customers to attach the covers.

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Factory Photo Gallery

  • A spacious industrial workshop with multiple workers operating stamping machines along both sides. The machines have large circular components, and blue plastic crates filled with materials are placed throughout the floor. The ceiling has exposed pipes and lighting, with a clean, organized workspace and a visible exit in the background.
  • A worker in a blue shirt operates a punch press machine in an industrial setting. The machine, featuring a yellow and white frame with a control panel and a warning sign, is stamping a metal piece. A digital control box is visible on the right, and various industrial equipment can be seen in the background.
  • A close-up view of a worker's gloved hand operating a metal press machine, pressing a metal piece. The machine features a blue component and Chinese text, set on a workbench in an industrial environment, with an overall yellowish tint caused by the ambient lighting.
  • A close-up view of a large punch press machine stamping metal components. The machine has a metallic frame with precise alignment and pressure points, operating in an industrial environment.
  • A spacious spot welding workshop with multiple workers at workstations, operating spot welding equipment and handling metal components. The room is well-lit with overhead lights, featuring blue and green storage bins, worktables, and various equipment along the sides.
  • A close-up of a spot welding workbench featuring a spring-loaded arm, surrounded by piles of copper and silver metal components on a tray. The workbench is set in a factory environment, with storage bins visible in the background.
  • A worker's hands performing spot welding on small metal components placed on a green mat, using a precision tool connected to a hose. The workstation includes a metal table with scattered metal parts, a red container, and a pair of scissors, set in an industrial environment.
  • A spacious automatic workshop decorated with red triangular flags hanging from the ceiling, featuring multiple automated workstations with machinery and a worker operating equipment. The room is well-lit with overhead lights and air conditioning units, and includes various industrial tools and devices.
  • A close-up view of an automated riveting machine with a central rotating platform, surrounded by multiple robotic arms, sensors, and metallic components. The machine features various wires and hoses, operating in a clean industrial environment.
  • A detailed view of an automatic spot welding machine with a central rotating platform, surrounded by mechanical devices, tubes, and metallic components. The machine features green and metallic parts, with wires and hoses connected, operating in a controlled industrial environment.
  • A detailed view of an automatic welding machine with multiple metallic components, wires, and robotic arms, set on a workbench in an industrial environment. The machine includes various sensors and tools.
  • A close-up view of an automated spot welding machine with a conveyor belt, robotic arms, and a bowl of metal parts. The setup includes various wires, tubes, and components, operating in an industrial environment with a green container and scattered components nearby.
  • A close-up view of a wire cutting machine actively processing wires, featuring a central cutting tip, blue and red hoses, and robotic arms. The setup includes a metallic workbench with wires and tools, illuminated by overhead lights in an industrial environment.
  • Multiple spools of copper brush wire neatly arranged with guide rollers, placed next to a blue plastic bin used for holding finished or semi-finished products. The setup is on a tiled floor in an industrial environment, with additional blue bins and equipment visible in the background.
  • A close-up view of the tapping head on an automatic tapping machine, featuring multiple drilling tools and blue flexible hoses, actively working on a metal block. Metal shavings and coolant are visible, with the machine operating on a workbench in an industrial setting.
  • An automated tapping machine with multiple motors and control panels, surrounded by blue bins and baskets filled with metal components. The setup includes a feeder bowl and wiring, operating in a well-lit industrial workshop with other equipment in the background.
  • A warehouse scene featuring two large pallets stacked with black MCCB (Molded Case Circuit Breaker) bases, wrapped in protective plastic. The pallets are placed on a tiled floor near a green worktable. Under the table, red plastic crates used for holding products is visible, with various equipment in the background.
  • An assembly line featuring a green workbench with black MCCB bases and piles of metallic components. The setup includes orange and white trays containing screws and other small parts, set in an industrial workspace with blue storage bins visible in the background.
  • A photo of an engineer working at a desk, designing a mold on a computer with a large monitor displaying a CAD (Computer-Aided Design) software interface. The desk includes a keyboard, a smartphone, an open notebook, and a coffee mug. The background shows a modern office setting with a sofa and glass walls
  • A technician operating a Wire Cut EDM (Electrical Discharge Machining) machine in an industrial workshop. The machine features a red, white, and gray color scheme, with a control panel, actively cutting a metal workpiece. The background shows a clean, well-lit workshop with additional equipment and workbenches.
  • A blue industrial surface grinding machine with visible wear and metal shavings scattered around, situated in a workshop with a white wall and various tools in the background.
  • A green industrial milling machine with a water bottle and a red tray of metal shavings on its table, featuring a drill bit and coiled air hose, set in a cluttered workshop with tools and equipment in the background.
  • An industrial surface grinder machine in a workshop, featuring a sturdy metal frame with a large handwheel, a digital display, and a grinding wheel enclosed in a red safety guard. The machine is equipped with a worktable, control knobs, and a coiled red power cord. A wooden handle and various metal tools are placed nearby, with a window and safety mesh in the background.
  • A close-up view of an old green bench drill press mounted on a sturdy metal workbench in an industrial workshop. The drill features a tall column with a hand lever and chuck, positioned over a large work table cluttered with metal scraps, a small tray of screws and nails, wrenches, pliers, and a green oil can. The background shows stainless steel panels and a window with safety mesh.
  • A worker in a blue shirt inspects large metal mold parts on a blue workbench in an industrial workshop. The parts have intricate cutouts and are placed next to tools and a red container. In the background, there are shelves with blue bins, a green drill press, and various equipment, with a coiled red power cord visible.
  • Two workers wearing blue shirts and gloves collaborate at a blue workbench in an industrial workshop, maintaining metal molds with intricate cutouts. A small drill is placed nearby. The table is cluttered with tools, a plastic bag, cans, and a green spray bottle. In the background, shelves with equipment, red coiled cords, a pegboard, and storage bins are visible.
  • A photo of a technician in a gray shirt working at an Instantaneous Trip Test Bench, testing an MCCB (Molded Case Circuit Breaker). The bench features a control panel with a digital display, multiple switches, and electrical components. A warning sign with a lightning bolt is visible on the left side, and the setup is located in an industrial lab with tiled flooring and additional testing equipment in the background.
  • A mechanical endurance test device for molded case circuit breakers (MCCBs), featuring a metallic frame with adjustable arms and clamps holding an MCCB unit, set against a background with a blue window visible.
  • A close-up view of a temperature rise test bench for molded case circuit breakers (MCCBs), featuring a central MCCB unit with multiple copper connectors and black cables attached, mounted against an orange panel.
  • An industrial laboratory featuring a tall, white-framed electronic universal testing machine at the center, equipped with a black hydraulic gripper arm suspended from the top crosshead, a digital control monitor displaying interface options, and yellow safety warning labels on the transparent safety enclosure. To the left, two tall blue metal storage cabinets with glass doors hold organized lab supplies including red toolboxes, plastic bins, documents, and small equipment. The right side shows a gray workbench with additional tools like a drill, clamps, and a red-labeled cleaning spray bottle next to a white lab cart. The cleanroom environment includes overhead fluorescent lighting, wire mesh guards, and background machinery visible through large windows。
  • A laboratory desk featuring an EDX 8300B X-ray Fluorescence Spectrometer on the left, with a digital display and control button, positioned next to a computer monitor displaying a spectral graph, a keyboard, and a mouse. Papers and a pen are scattered on the desk, with a black computer tower and a labeled sign in Chinese on the right. Blue storage drawers are visible below the desk, and industrial equipment can be seen through the window in the background.
  • A laboratory workstation featuring a white Vickers Hardness Tester machine with a mounted metal sample under the diamond indenter, digital display showing zeroed measurements, and control panel. Adjacent is a Dell monitor running analysis software with a green fibrous material image and data graphs, a black keyboard, scattered blueprints and tools on the desk, and a white electric fan nearby, all in a brightly lit industrial room with window views.
  • A laboratory workbench displaying, on the left, a Spring Tension and Compression Testing Machine with a digital display, control buttons, and manual lever for force application, and on the right, a compact digital scale with an LCD readout. A bilingual label (Chinese and English) is positioned in front of the machine, with industrial shelving and green storage bins visible in the background.
  • A side-by-side display of two electrical testing instruments on a black lab bench, illuminated by soft overhead light in an industrial workshop with glass partitions and shelving in the background. On the left is a compact beige coil turn counter with a digital LCD readout showing measurement values, a detachable blue probe arm on a swivel base, and a power adapter plugged into the side; labeled "Coil Turn Counter" on a white placard in Chinese and English. On the right is a rugged silver aluminum carry case, open to reveal a portable contact resistance tester with coiled red and black test leads, battery clips, a digital multimeter-style interface, and foam-padded compartments for accessories. These tools are essential for verifying electrical integrity in circuit breaker components like coils and contacts, ensuring safety and reliability in manufacturing quality assurance.
  • A laboratory workbench setup featuring two industrial testing instruments side by side against a blurred background of shelving and storage in a manufacturing facility. On the left is a gray Rockwell hardness tester, with a large analog dial gauge displaying measurements, a vertical drill-like indenter arm, and a sturdy base clamp; it's labeled "Rockwell Hardness Tester" on a white placard. To the right is a modern white digital tensile testing machine, equipped with a vertical column, electronic control panel with LCD display, and a clamp mechanism for pulling samples; labeled "Tension Tester" on a similar placard. Between them sits an open binder of printed test data sheets with tables of measurements and Chinese annotations, clipped to a stand, alongside a small metal disc on a pedestal. The black countertop and glass enclosure emphasize precision engineering for material strength evaluation in electrical component production.
  • A close-up overhead view of an assortment of custom-machined metal inspection fixtures and jigs arranged on a dark workbench surface, used for quality control testing of Molded Case Circuit Breaker (MCCB) components. In the center is a large rectangular steel plate with multiple L-shaped and geometric cutouts, secured with bolts and a black handle for portability. Surrounding it are smaller aluminum and steel pieces including slotted brackets, vise-like clamps, perforated plates with engraved markings (such as "ZJ-24"), and angled fixtures with precise notches for measuring electrical terminals and housings. Nearby tools include a brass tape measure, steel calipers, a black toolbox, loose screws, and a ruler, all casting subtle shadows on the matte black background, highlighting the industrial precision engineering involved in electrical safety component verification.
  • A close-up view of a granite surface plate in an industrial metrology lab, with a hand wearing a red knitted glove and green wristband holding a small labeled metal sample with QR code. Nearby are a blue Mitutoyo digital depth gauge, chrome height gauges on adjustable stands, scattered black clamps, brass blocks, a yellow-handled screwdriver, and blue plastic components on the dark surface. The setup is enclosed in a glass-walled room with overhead lighting.
  • A detailed view of a modern industrial metrology lab where an Asian male technician in a light blue collared shirt and glasses sits focused at a sleek black workstation, operating an optical coordinate measuring machine (CMM). The tall, silver cylindrical CMM stands prominently on the left, featuring a precision stage with a glass worktable illuminated from below, a red-knobbed objective lens turret, and adjustable arm for non-contact scanning. On the dual-monitor setup to the right, the left screen displays a high-magnification live image of a circular metal workpiece with overlaid digital grids, measurement points, and color-coded analysis tools, while the right screen shows a detailed CAD blueprint of mechanical components including gears and brackets. Surrounding the setup are a mechanical keyboard, a worn notebook filled with hand-drawn engineering sketches, a small wooden storage box, and scattered tools on a granite surface base for vibration damping. In the background, large windows reveal a workshop with wooden barrels, shelving units, and diffused natural light, highlighting a collaborative environment for quality control and dimensional inspection in manufacturing.
  • A mold warehouse with a worker sitting at a desk with a computer on the left side, surrounded by rows of red and blue shelving units. The shelves are filled with blue crates and various molds, organized neatly along a narrow aisle. The ceiling has exposed pipes and lighting, and the floor is marked with yellow lines for safety.
  • A spacious warehouse with multiple rows of metal shelves filled with iron and copper components used for molded case circuit breakers (MCCBs). Green and blue crates containing parts are placed on the floor and shelves, organized along a central aisle. The ceiling features exposed beams and lighting, with a clean and orderly environment.
  • A warehouse shelf displaying stacks of iron and copper components for molded case circuit breakers (MCCBs), organized in plastic bags and labeled, with a variety of metallic parts in silver, copper, and bronze tones.
  • A warehouse with rows of orange and blue shelving units filled with semi-finished molded case circuit breakers (MCCBs), featuring a worker operating a forklift among stacks of grey components.
  • A warehouse shelf with orange supports, stocked with stacks of semi-finished molded case circuit breaker (MCCB) parts, primarily white and metallic components, organized in plastic bags and labeled for inventory.
  • A warehouse shelf filled with neatly organized molded case circuit breakers (MCCBs) stacked in rows, with additional green bags and boxes stored on the upper shelves.
  • A warehouse shelf filled with green plastic bags containing screws, nuts, and similar hardware components, stacked across multiple levels. The shelves are made of blue metal, and the background shows a clean, well-lit room with additional equipment and storage visible through a glass partition.
  • A warehouse shelf unit filled with cardboard boxes and containers holding various accessories for molded case circuit breakers (MCCBs), neatly labeled and organized across multiple levels, with some open boxes revealing small components and wires.
  • A green workbench displaying four cardboard boxes designed as inner color packaging, featuring a blue and white color scheme with "MCCB" branding. The boxes include two partially folded rectangular boxes and two fully formed boxes, one rectangular and one cubic.
  • A photo showing a row of open cardboard boxes labeled "MCCB" with blue and white branding, neatly arranged on an assembly workstation in an industrial setting. Some boxes contain items inside. In the background, shelving units with blue bins and various materials are visible, indicating a workshop or production environment.
  • A photo showing a long row of white cardboard boxes with blue "MCCB" labels stacked in multiple layers along an assembly line workstation. The boxes vary in height arrangement, with blue bins, shelving units, and factory equipment visible in the background, indicating an active production environment.
  • An open brown cardboard outer box containing multiple rows of white inner packaging boxes, each prominently labeled "MCCB" in blue text, arranged neatly inside.
  • A photo showing a stack of cardboard boxes labeled "MCCB" neatly arranged on a pallet, stacked in multiple layers with a piece of paper placed on top of the middle stack. The boxes are positioned beside an assembly line, with a conveyor belt holding blue bins and a person standing nearby visible in the background, along with industrial shelving and equipment.
  • A green assembly line surface displaying several unfinished neutral inner packaging boxes made of Kraft paper, including two partially folded rectangular boxes, one fully assembled rectangular box, and one cubic box. Workshop equipment and tools are visible in the background, showing the packaging preparation stage before final product assembly.
  • A green assembly line workstation displaying multiple open white inner packaging boxes, each containing a white mccb unit sealed in a plastic bag. The inner boxes are arranged neatly in rows, with additional electrical components and tools visible in the background.
  • An open brown cardboard box containing a white foam padding insert, internally securing a high-current MCCB, featuring a white housing. Additional stacked boxes are visible in the background, placed on the floor.
  • A stack of brown cardboard outer boxes with corner protectors, neatly arranged in a warehouse setting. The boxes are labeled and taped, with additional boxes and packaging materials visible in the background on a tiled floor.
  • A stack of brown cardboard outer cartoons secured with white strapping, placed on a cart in an industrial warehouse. The boxes are labeled with text, and additional boxes and equipment are visible in the background on a tiled floor.
  • A warehouse scene featuring multiple stacks of brown cardboard boxes, some wrapped in plastic, with a yellow pallet truck parked nearby. The boxes are arranged on wooden pallets, and a large screen or window is visible in the background on a tiled floor.
  • A tall stack of goods wrapped in green woven sacks, secured on a blue wheeled pallet in an outdoor loading=

FAQs About Working with Us

Get Your MCCBs with Easy!

At Sincede, We turn complex Into Simple! Follow the following 4 steps to start today!

  1. 1. Tell Us Your Needs

    Share your specifications, such as current rating, QTY, packaging. Our team will review your needs.

  2. 2. Get Solution & Quote

    We provide the right MCCB solution with detailed specifications and a competitive quotation.

  3. 3. Samples Confirmation

    Samples are available for testing, so you can check quality and performance before placing an order.

  4. 4. Order & Production

    After approval, we arrange mass production and ensure on-time delivery for your project.

Get a Free Quote

Send us a message if you have any questions or request a quote. We will be back to you ASAP!

Get a Free Quote

Send us a message if you have any questions or request a quote. We will be back to you ASAP!