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Product Overview
Achieve absolute electrical isolation and safety with the CHNAILE BD1-63S series 4-Pole Miniature Circuit Breaker (MCB). Specifically engineered for complex 3-Phase + Neutral alternating current (AC) networks up to 400V, this 20A breaker provides the highest tier of protection for demanding commercial and industrial environments. By simultaneously switching all three live phases and the neutral line, it guarantees 100% circuit isolation during maintenance. Proudly bearing the CE mark and complying with IEC60898-1, it mounts effortlessly onto standard 35mm DIN rails, making it an indispensable asset for large-scale electrical contractors and panel builders globally.
Technical Parameters
Device Category: | AC Miniature Circuit Breaker (MCB) |
Number of Poles: | 4P |
Rated Current (In): | 20A |
Rated Operating Voltage (Ue): | AC 400V |
Rated Frequency: | 50/60Hz |
Rated Breaking Capacity (Icu): | 6000A (6kA) |
Tripping Characteristic: | Curve C (Optimized for standard inductive and resistive loads) |
Mounting Configuration: | 35mm Standard DIN-Rail |
Standard Compliance: | Fully CE Certified, IEC60898-1 Compliant |
1. Comprehensive Protection Functions
Total Isolation (4-Pole Simultaneous Disconnect): In the event of a fault, the internal common trip mechanism instantly disconnects L1, L2, L3, and the Neutral wire simultaneously. This eliminates the risk of neutral return currents, providing ultimate safety for maintenance crews in commercial facilities.
Precision Overload Protection: Bi-metallic strips accurately detect sustained overcurrents, cutting power before wire insulation melts in high-load scenarios like industrial motor operations.
Short Circuit Quick Break: Advanced electromagnetic tripping systems instantly extinguish massive fault currents up to 6000A, preventing catastrophic fires in main distribution panels.
2. Premium Material & Robust Structure
Industrial-Grade Flame Retardant Shell: Enclosed in a rugged, V0-grade thermosetting plastic case. It delivers exceptional thermal endurance and prevents combustion even in high-temperature plant rooms.
Universal DIN-Rail Mounting: Features a heavy-duty spring clip for fast, secure, and vibration-resistant installation onto standard 35mm DIN rails inside commercial enclosures.
High Conductivity Copper Parts: Internal contacts are forged from pure copper, minimizing power loss and preventing dangerous heat accumulation under continuous 4-pole 20A loads.
3. Superior Performance Advantages
Reliable 6kA Breaking Capacity: Confidently interrupts severe fault currents, making it highly cost-effective for commercial infrastructure and light-industrial power grids.
Clear Visual Status Indication: Distinctive green toggle switches display the 'O OFF' status, allowing facility managers to visually confirm total circuit isolation at a glance.
Global Standard Compliance: Fully CE certified, ensuring frictionless customs clearance and regulatory compliance across European, Middle Eastern, and Asian commercial markets.
4. Why Choose CHNAILE Factory
Direct Manufacturer: Eliminate middlemen by partnering directly with our primary source factory. We offer highly competitive wholesale pricing to maximize your project margins.
Strict Quality Control: Every 4P circuit breaker undergoes 100% rigorous automated testing for synchronized tripping accuracy before leaving our state-of-the-art facility.
Global Supply & OEM Support: Equipped for massive bulk orders, rapid global fulfillment, and comprehensive OEM/ODM customization to prominently feature your brand logo.
Target Application Scenarios
Designed for environments requiring absolute safety and complete neutral disconnection:
Commercial Distribution Boards: Main incoming switches for shopping malls, office buildings, and hotels.
Industrial HVAC Systems: Protection circuits for large-scale heating, ventilation, and commercial air conditioning units.
Data Centers & Server Rooms: Sub-distribution panels requiring strict 3-phase and neutral isolation.
Manufacturing Facilities: Control panels for heavy machinery and three-phase motor equipment.
