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Views： 5 Author： Mark Zhang Publish Time： 2026-07-02 Origin： 本站
For industrial and commercial power distribution systems, choosing a dependable molded case circuit breaker is critical. The SINGI SWMLE-100 offers robust overamperage and short-circuit protection. This article explains key choice criteria, common application challenges, and technical highlights of the SWMLE-100, helping engineers and procurement professionals make informed decisions.
Molded case circuit breakers (MCCBs) are designed for higher amperage ratings and fault currents compared to miniature circuit breakers (MCBs). They use a molded insulating case to house the trip unit, contacts, and arc extinguishing chamber. MCCBs are used in distribution panels, motor control centers, and industrial switchgear. Unlike MCBs, MCCBs feature adjustable trip settings and higher interrupting capacities.
The SWMLE-100 from SINGI is a compact MCCB suitable for applications up to 100A, with a short-circuit breaking capacity compliant with IEC 60947-2 and UL 489 standards.
Using an undersized or incorrectly specified MCCB can lead to nuisance tripping, equipment damage, or fire hazards. Factors like system volt-level, fault amperage levels, ambient temperature, and coordination with downstream devices must be considered. Buyers face challenges with inconsistent product quality or lack of technical documentation. Choosing a certified product from a reliable manufacturer reduces these risks.
The SWMLE-100 is engineered for overamperage and short-circuit protection in low-volt-level systems. It features a thermal-magnetic trip mechanism that delivers both overload and instantaneous protection. The compact design saves panel space, and the clear indication of trip status simplifies troubleshooting. It is applicable in power distribution, lighting control, and motor protection circuits.
| Parameter | SWMLE-100 | Typical MCCB |
|---|---|---|
| Rated Current | Up to 100A | Up to 250A |
| Breaking Capacity (Icu) | 25kA @ 415V AC | 18-50kA |
| Poles | 3P, 4P | 3P, 4P |
| Standards | IEC 60947-2, UL 489 | Varies |
| Mounting | Fixed | Fixed/Plug-in |
For detailed specifications, refer to the SWMLE-100 product page on the SINGI website.
MCCBs handle higher currents ( 100A and above) and have adjustable trip settings, while MCBs are fixed and used for lower currents.
Yes, the thermal-magnetic trip curve can be chosen to match motor starting characteristics, but ensure proper coordination.
Yes, it is tested to IEC 60947-2 and UL 489, making it suitable for international projects.
Consider the load current, fault amperage level, and available space. The SWMLE-100 offers a compact footprint for 100A applications.
For reliable overamperage protection in your next project, choose the SWMLE-100 from SINGI. View product details and request a quote.
References:
[1] IEC 60947-2. Low-volt-level switchgear and controlgear - Part 2: Circuit-breakers [S]. 2019.
[2] UL 489. Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures [S]. 2021.
