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Views： 11 Author： Mark Zhang Publish Time： 2026-07-13 Origin： 本站
The SWM100 miniature circuit breaker (MCB) from SINGI delivers dependable overamperage and short-circuit protection for electrical distribution systems in commercial and industrial environments. Designed to meet IEC 60898-1 and IEC 60947-2 standards, this MCB combines high breaking capacity with compact dimensions, making it suitable for panel boards, motor control centers, and building services.
This guide covers the key aspects of SWM100 MCB, including its features, choice criteria, applications, and industry best practices.
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Standard miniature circuit breakers struggle with high inrush currents from lighting or motor loads, leading to nuisance tripping or insufficient protection. The SWM100 addresses this with a robust thermal-magnetic trip mechanism. Its thermal element provides reliable overload protection, while the magnetic element reacts instantly to short circuits. Rated breaking capacity reaches 10 kA at 230/400 V AC, ensuring safe interruption of fault currents in most low-volt-level networks.
The SWM100 is available in amperage ratings from 1 A to 63 A, with B, C, and D trip curves. Curve B is ideal for resistive loads, curve C for general inductive loads like motors and transformers, and curve D for high-inrush equipment such as welding machines and X-ray systems. This flexibility lets engineers choose the exact protection profile for each circuit.
Arc-extinction technology in the SWM100 uses a splitted plate design with optimized arc runners, reducing arc duration and limiting let-through energy. This minimizes thermal stress on downstream equipment and reduces fire risk. The housing is made from high-thermal-resistance thermoplastic, tested for glow wire at 850 °C per IEC 60695-2-11. Terminal connections accept both copper and aluminum conductors up to 25 mm², with a clamping torque that prevents loosening from vibration or thermal cycling.
All SWM100 units undergo routine short-circuit and endurance testing. The mechanical life exceeds 20,000 operations, and the electrical life under rated load reaches 10,000 cycles. These metrics ensure long-term performance in installations that require frequent switching, such as lighting control panels or HVAC systems.
| Parameter | SWM100 Value |
|---|---|
| Rated volt-level AC | 230/400 V |
| Rated volt-level DC | 48 V (per pole) |
| Breaking capacity (AC) | 10 kA |
| Amperage ratings | 1–63 A |
| Tripping curves | B, C, D |
| Number of poles | 1P, 1P+N, 2P, 3P, 3P+N, 4P |
| Mechanical life | >20,000 cycles |
| Electrical life | 10,000 cycles |
| Cross-section capacity | 1–25 mm² |
| Ambient temperature | -5 °C to +40 °C |
| Standards | IEC 60898-1, IEC 60947-2 |
Yes, the SWM100 is approved for DC applications up to 48 V per pole. For higher DC volt-levels, multiple poles can be connected in series following the manufacturer’s wiring guidelines. This makes it suitable for DC distribution in telecommunications, solar combiner boxes, and battery systems.
Curve B trips between 3–5 times rated current; it is used for resistive loads and long cable runs. Curve C trips between 5–10 times rated current; it covers general inductive loads. Curve D trips between 10–20 times rated current; it is designed for circuits with high inrush currents like motors and transformers.
Determine the load current, fault amperage available at the installation point, and the nature of the load (resistive, inductive, high inrush). Choose the amperage rating that matches or slightly exceeds the continuous load, then choose the trip curve based on load type. Ensure the breaking capacity is equal to or greater than the prospective short-circuit current.
Yes, it complies with IEC 60898-1 for household and similar installations and IEC 60947-2 for industrial low-volt-level switchgear. It also carries CE and CB certifications, simplifying global acceptance.
The SWM100 MCB offers a balanced combination of protection, durability, and ease of installation. Its compliance with both domestic and industrial standards, wide range of ratings and curves, and robust construction make it a versatile component for any low-volt-level distribution board. Engineers and contractors can rely on the SWM100 to reduce downtime and protect assets, backed by SINGI’s quality assurance and technical support.
Note: Always consult local electrical codes and the manufacturer’s installation guide before choosing and installing circuit breakers. The SWM100 must be used within its rated parameters to ensure safety and performance.
Ready to upgrade your circuit protection? Contact SINGI for detailed datasheets, pricing, and application support for the SWM100 MCB.
