A modern electrical system demands not only efficiency and stability but also top-level safety. Whether it’s a small home or a large industrial plant, choosing the right protection device is vital. Among the many names like MCB, MCCB, RCCB, RCBO, and ELCB, confusion is common. This article will help you clearly understand their functions, differences, and most importantly – explore the comprehensive protection solutions from LS ELECTRIC.
🔌 1. MCB – Miniature Circuit Breaker
MCB is a compact circuit breaker designed to protect circuits from overloads and short circuits. When the current exceeds the set threshold, the MCB automatically disconnects the line to protect wires and devices.
📍 Applications:
- Residential and commercial installations
- Sub-panels, lighting circuits, outlets
💡 LS ELECTRIC Product:
L-Series MCB meets IEC60898-1/60947-2 standards, offers up to 15kA breaking capacity, rated current up to 125A, compact design, compatible with DIN rail mounting, and operates reliably in tropical environments.
⚡ 2. MCCB – Molded Case Circuit Breaker
When higher current protection is required, MCCB is the ideal choice. It offers adjustable trip settings, used for overload, short circuit, and even motor protection.
📍 Applications:
- Main distribution boards
- Industrial power systems
- Large compressors, motor loads
💡 LS ELECTRIC Product:
Susol MCCB – LS’s leading industrial MCCB:
- Rated up to 1600A
- Breaking capacity up to 85kA
- Supports add-ons: auxiliary contacts, trip indicators, interlocking mechanisms…
⚠️ 3. ELCB – Earth Leakage Circuit Breaker
ELCB protects against ground leakage current. However, it’s based on voltage sensing technology and is now considered outdated due to low sensitivity.
⚠️ Limitations:
- Poor performance if grounding is not solid
- Mostly replaced by RCCB & RCBO today
🧠 4. RCCB – Residual Current Circuit Breaker
RCCB monitors the current between live and neutral wires. When an imbalance is detected, it disconnects instantly, preventing electric shocks.
📍 Applications:
- Bathrooms, washing machines, pools
- Outdoor circuits
- High-risk electrical zones
💡 LS ELECTRIC Product:
RCCBs in the L-Series come in:
- AC, A, B types, with optional time delay
- Fully IEC-compliant
- Easy DIN mounting and fully modular with LS MCBs
🔰 5. RCBO – Residual Current Breaker with Overcurrent
RCBO = RCCB + MCB, combining earth leakage + overload + short circuit protection into one compact device.
📍 Applications:
- Dedicated outlet protection
- Sensitive equipment: water heaters, washing machines, pumps
💡 LS ELECTRIC Product:
L-Series RCBOs available in 2P and 1P+N, with sensitivity from 30mA, ideal for premium residential, offices, and hotels.
📊 Quick Comparison Table
| Device | Overload / Short Circuit | Earth Leakage | Applications | Sensitivity | Technology |
|---|---|---|---|---|---|
| MCB | ✔️ | ❌ | Lighting, outlets | Medium | Electromagnetic |
| MCCB | ✔️ | ❌ | Industrial, main panels | High | Adjustable |
| ELCB | ❌ | ✔️ | Older systems | Low | Voltage sensing |
| RCCB | ❌ | ✔️ | High-risk areas | High | Current sensing |
| RCBO | ✔️ | ✔️ | Sensitive loads | Very high | All-in-one |
🌐 LS ELECTRIC – A Complete Ecosystem for Electrical Protection
LS ELECTRIC doesn’t just offer individual devices, but a unified, safe and modern system including:
- MCB, RCCB, RCBO L-Series: for homes, apartments, hotels
- Susol MCCB: for industrial plants, malls, substations
- Contactors, thermal relays, MCB boxes: for control & comprehensive protection
All products are globally certified, highly compatible, and durable in Vietnam’s harsh conditions, including areas with high humidity, temperature fluctuations, and unstable power supply, ensuring long-term stability and user safety.
📌 Conclusion
Choosing the right breaker among MCB, MCCB, RCCB, RCBO or ELCB is not just a technical decision – it reflects your commitment to a smarter, safer, and more sustainable electrical system.
LS ELECTRIC product goes beyond devices – we deliver end-to-end protection solutions from residential to industrial projects, giving you total peace of mind with every power-up.
☎️ Contact for Consultation & Quotation
LS ELECTRIC Vietnam hopes this article provides valuable information to our customers.
For product consultation and quotation, please contact:
📞 Hotline: 18006870
📧 Email: hamh@ls-electric.com.vn
LS ELECTRIC VIETNAM, always with our customers
LS ELECTRIC Product
