Miniature Circuit Breaker (MCB)

Safeguard your terminal electrical circuits with Sincede’s high-performance MCBs. Engineered for precision and safety, our MCBs provide reliable protection against overloads and short circuits in residential, commercial, and industrial power systems.

As a manufacturer-integrated group, we offer direct factory advantages: consistent quality control, moderate pricing, and a robust supply chain. From standard 6kA residential units to 10kA industrial-grade breakers and specialized 1200V DC solar protection, we provide the exact specifications your project demands.

Backed by global certifications, Sincede is more than a supplier—we are your technical partner. Explore our comprehensive range or contact our team for support!

  • IEC 60898-1
  • IEC 60947-2
  • CE
  • CB
  • ISO
  • RoHS
A close-up of an 8-way consumer unit with seven single-pole miniature circuit breakers (MCBs) mounted on a DIN rail. Ratings visible are C25, C16, C10, C16, C10, C10, and C16, all switched to ON position with blue identification flags on top.

MCB Product Series

Select the optimized circuit protection for your specific application.

  • SC - 63 Series

    Residential / Commercial
    Breaking Capacity: 4.5kA ~ 6kA

    Application Guide: Optimized for household distribution boards and commercial lighting. Reliable protection for standard electrical systems.

    • Rated Current: 1A – 63A
    • Poles: 1P – 4P
    • Curve: B, C, D
    • Standard: IEC 60898-1

  • SC - 125 Series

    Industrial / Heavy Duty
    Breaking Capacity: 6kA ~ 15kA

    Application Guide: Engineered for industrial plants and heavy machinery. Features high-amp capacity for continuous operational stability.

    • Rated Current: 63A – 125A
    • Housing: V0 Flame Retardant
    • Contact: 95% Silver Alloy
    • Standard: IEC 60947-2

  • SC - PV Series

    Photovoltaic / DC System
    Max Rated Voltage: DC 1200V

    Application Guide: Designed for high-voltage DC circuits in solar combiners and inverters. Features non-polarized safety protection.

    • Voltage: DC 500V – 1200V
    • Polarity: Non-polarized
    • Type: Magnetic Tripping
    • Standard: IEC 60947-2
    A robust white plastic double-pole miniature circuit breaker (MCB) specifically designed for solar photovoltaic and direct current (DC) applications, featuring two gray toggle switches in the ON position with green status indicators, screw terminals on the top and bottom for secure DC line and load connections, and DIN rail mounting capability, providing reliable overcurrent and short-circuit protection in solar and DC electrical systems.

SKD & Local Manufacturing Support

Sincede empowers global distributors to establish their own manufacturing capabilities with proven technical support.

  • Precision Component Kits

    Supply of full-set internal components including silver alloy contacts and V0 flame-retardant housings. Identical to our own factory standards for stable local output.

  • Duty & Logistics Optimization

    Compact packaging designed to significantly reduce import tariffs and sea freight costs for higher profit margins.

  • Test Equipment Sourcing

    One-stop assistance in acquiring professional MCB manufacturing tools, including specialized thermal and magnetic calibration test benches.

  • Technical & Assembly Guidance

    We don't just sell parts. Our team offers direct technical support and assembly guidance to help your staff master the local production process efficiently.

  • Two white plastic housings of a miniature circuit breaker (MCB) placed side by side on a green surface. On the left is the semi-assembled SKD unit showing internal components including the electromagnetic coil, bimetallic strip, arc chute, contacts, and trip mechanism. On the right is the empty housing displaying the internal structure and mounting points without components.
  • An industrial calibration system for MCBs (Miniature Circuit Breakers), designed to verify auto-reclosing, time-delay, and tripping characteristics. The equipment features a central control panel with a display, control buttons, and indicator lights, along with four independent test stations equipped with actuators for mounting and cycling MCBs during automated calibration and quality inspection in electrical device manufacturing.
  • A green industrial workbench featuring a central manual arbor press with a red flywheel and lever arm, utilized for riveting operations during miniature circuit breaker (MCB) production. The surface displays organized stacks of white plastic MCB housings and components in various assembly stages, blue bins holding rivets, screws, and related hardware, along with additional tools, illustrating an active riveting process in electrical protection device manufacturing.

Why Partner with Sincede?

We understand the challenges of B2B procurement. Here is how we make your job easier.

  • Manufacturer Direct

    Direct factory pricing with no middlemen. Maximize your profit margins through our integrated supply chain.

  • Premium Materials

    Built with 95% silver alloy contacts and V0 flame-retardant housings for maximum safety and life.

  • SKD & Localization

    Establish your local brand with our full SKD kits, technical SOPs, and equipment sourcing support.

  • Full Compatibility

    Engineered for seamless integration and verified coordination with Sincede’s MCCB and ACB ranges.

  • 100% QC Testing

    Zero-defect guarantee. Every single pole undergoes 100% testing before shipment to ensure reliability.

  • Rapid Lead Times

    Fast delivery within 7-15 days, Leveraging our integrated supply chain to keep your projects on schedule.

  • Global Compliance

    Fully compliant with IEC standards and backed by CE, CB, and RoHS for global project approvals.

  • One-Stop Sourcing

    Consolidate your full range—ACB, MCCB, and MCB—into one shipment to save logistics costs.

Frequent Asked Questions

  • What is the content of the silver contacts?

    We use high-grade AgSnO2 alloy contacts with 85% to 95% silver content. This ensures superior anti-welding properties and massive electrical endurance, preventing the "sticking" issues common in low-quality breakers.

  • Can you handle private labeling (OEM) for our local brand?

    Yes. We offer precision laser printing for your logo and customized packaging design with flexible MOQs. We help you build your own brand dominance while we handle the manufacturing.

  • What is the difference between B, C, and D tripping curves?

    B Curve is for resistive loads (heaters); C Curve is the standard for lighting and power; D Curve is for high-startup currents like industrial motors. If you are unsure, C Curve is the global universal choice.

  • Are Sincede MCBs compatible with other brands' systems?

    Yes. Our MCBs follow the standard 35mm DIN-rail mounting. Furthermore, we provide selectivity tables to ensure our MCBs coordinate perfectly with your existing MCCB and ACB protection layers.

  • How do you support partners who want SKD?

    We provide high-quality internal components identical to our factory standards. Additionally, we offer technical guidance and support in sourcing local testing equipment to ensure your final products are reliable.

  • What is the typical lead time for bulk orders?

    Lead times are tailored to the order volume and requirements. For standard models, we leverage our ready-stock components to ensure a fast turnaround. Once your project details are finalized, our team will provide a confirmed production schedule within 24 hours.

Secure Your Power Needs Now!

No more delays. We’re here to power your project with reliable circuit breakers and fast service.

Industrial stamping machine with a yellow safety bar at the top, black base connected to cables and pneumatic tubes, blue tools on the press bed, and control buttons including green start and red stop at the bottom.

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