DELIXI CDB9N CDB9H 1P-4P MCB Miniature Circuit Breaker 1A-63A B-C-D Curve. Suitable for low-voltage terminal power distribution and protection applications.
Delixi Electric CDB9N CDB9H Circuit Breaker
| Product Name | CDB9N CDB9H Circuit breaker |
| Brand | DELIXI ELECTRIC |
| Model | CDB9N CDB9H |
| Pole Number | 1P, 2P, 3P, 4P |
| Rated current | 1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Volatge | 230V/400V AC |
| Frequency | 50Hz |
| Breaking Capacity | 6kA (CDB9N), 10kA (CDB9H) |
| Trip curve | B, C, D |
Suitable for low-voltage terminal power distribution and protection applications.
| Rated Current |
1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
|---|---|
| Breaking Capacity |
6kA (N), 10kA (H) |
| Trip Curve |
B, C, D |
| Poles |
1P, 2P, 3P, 4P |
Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for DELIXI CDB9N CDB9H 1P-4P MCB Miniature Circuit Breaker 1A-63A B-C-D Curve.
Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.
Curve B trips at 3–5 In (designed for resistive loads, electric heating, and domestic appliances with negligible inrush). Curve C trips at 5–10 In (the standard international choice for residential and commercial lighting, socket outlets, and small induction motors). Curve D trips at 10–14 In (specifically engineered for high-inrush inductive equipment such as industrial transformers, heavy motors, compressors, and welding circuits).
Breaking capacity (Icn/Icu) must exceed the calculated prospective short-circuit fault current at the installation point. 6kA (IEC 60898-1) is standard for residential consumer units and sub-distribution branch circuits located downstream. 10kA (IEC 60947-2) is required for industrial facilities, main switchboards, commercial distribution panels, or circuits situated close to supply transformers where fault levels are high.
For single-phase 230V circuits: 1P provides active phase protection; 1P+N or 2P isolates both live and neutral lines simultaneously (essential for TT earthing systems and sensitive sub-panels). For three-phase 400V systems: 3P protects balanced 3-wire motor loads; 3P+N or 4P is required for 4-wire mixed single-phase loads to ensure complete neutral disconnection during isolation.
Standard AC breakers cannot safely extinguish DC arcs due to the absence of natural zero-crossing current. For DC circuits (60V to 1000V DC), select specialized DC breakers (such as DZ158-125 DC or NM8NDC series) equipped with permanent magnetic arc-blowout chutes and strictly observe polarity wiring to prevent arc re-ignition.
Standard modular clip-on accessories can be mounted directly on the side without tools: OF (Auxiliary Contact for remote status indication), SD (Alarm Contact for trip fault signaling), MX (Shunt Trip for remote emergency tripping), MN (Under-voltage Release for voltage loss protection), and NXBZ mechanical interlock kits for manual generator/mains transfer switches.
