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Molded Case Circuit Breakers
Designed to safeguard circuits and equipment from overload, short circuit, and under-voltage faults, MCCB series offer high breaking capacity, flexible installation options (vertical/horizontal mounting), and compliance with international standards like IEC 60947-2. With rated current ranges from 10A to 630A and voltage compatibility up to 690V AC, these circuit breakers provide versatile solutions for power distribution systems, machinery protection, and critical infrastructure.
CNC MCCB
Designed for global power distribution systems, the YCM8N Series MCCB provides reliable overload, short-circuit, and under-voltage protection for industrial, commercial, and marine applications. Suitable for AC 50/60Hz circuits with rated voltage up to 690V and current ranging from 10A to 630A, it ensures safe power distribution and equipment protection. Compliant with IEC 60947-2 standards, it features high breaking capacity, flexible installation, and robust performance in harsh environments.
Rated Current: 10A–630A (frame sizes: 125, 250, 400, 630)
Rated Voltage: AC 230V/400V/690V; Insulation Voltage: 1000V
Poles: 1P, 2P, 3P, 4P
Breaking Capacity (Icu/Ics): Up to 50kA/35kA (AC400V)
Trip Characteristics: Type C (distribution) and Type D (motor protection)
Certifications: Complies with IEC 60947-2 standards
About CNC Electric
CNC Electric was founded in 1988 with the launch of our inaugural molded case circuit breakers — marking the beginning of our journey in power solutions. With a focus on product development and manufacturing, we reorganized into a corporate group by 1995 and introduced our first full low-voltage series, earning a reputation for rugged reliability.
Many of our products are CE, TUV, and RoHS certified, ensuring reliability and compliance. We focus on both efficient production and environmental responsibility, integrating sustainable practices into our processes.
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FAQ
What is the difference between MCB and MCCB?
MCBs (Miniature Circuit Breakers) are for low-current applications (≤100A), typically residential/commercial, with fixed trip settings. MCCBs (Molded Case Circuit Breakers) handle higher currents (10A–630A+), industrial/commercial use, and offer adjustable trip settings and higher breaking capacity.
What is a MCCB used for?
MCCBs protect electrical circuits and equipment from overload, short circuits, and under-voltage faults in industrial, commercial, and marine power distribution systems, including machinery, panels, and critical infrastructure.
What is MCB, MCCB, and RCCB?
- MCB: Low-current (≤100A) breaker for residential/commercial overload/short-circuit protection.
- MCCB: High-current (10A–630A+) breaker for industrial/commercial systems with adjustable protection.
- RCCB: Residual Current Circuit Breaker, detects earth leakage to prevent electric shock (no overload/short-circuit protection alone).
Is an MCCB an RCD?
No. MCCBs focus on overload/short-circuit protection, while RCDs (Residual Current Devices, e.g., RCCB) specifically detect leakage currents. Some MCCBs may integrate RCD functions as an accessory.
What types of MCCB are available?
Available by frame size (125A–630A), poles (3P/4P), trip units (thermal-magnetic/electronic), and applications (distribution/motor protection).
What certifications do your MCCBs have?
Compliant with international standards like IEC 60947-2, with mainstream safety certifications for global markets.
Do you support OEM customization for MCCBs?
Yes, OEM services are available, including custom parameters, branding, and packaging.
What is the lead time for MCCB orders?
Lead times vary by region, typically 2–4 weeks. Contact sales for exact delivery timelines.
How to contact your MCCB distributors?
For local distributor details, visit our official website or email [email protected].
