BH Bolt on MCB 5A 10A 15A 20A 30A 40A 50A 60A 70A 80A 90A 100A 1P 2P 3P Mitsubishi type branch Bolt on Circuit Breakers
Technical Specification:
| Model | BH (Bolt on type) | ||||
| Number of poles | 1 | 2 | 3 | ||
| Rated current (A) at ambient temperature 40C |
5, 10, 15, 20, (25), 30, 40, 50, 60 |
5, 10, 15, 20, (25), 30, 40, 50, 60, 70, 80, 90, 100 |
|||
| Rated voltage (V) | AC | 230/400 | |||
| DC | 125 | ||||
| Rated short circuit capacity (kA) | IEC 60898 | AC230/400V | 3KA | − | |
| AC400V | − | 3KA | |||
| − | DC125V | 1KA | |||
Outline Drawing:
| Weight | 2 kg |
|---|---|
| Dimensions | 25 × 25 × 25 cm |
| Rated Current |
5A – 100A |
| Poles |
1P, 2P, 3P, 4P |
Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for BH Series 1P/2P/3P Mitsubishi Type Bolt-on MCB 5A-100A.
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.
