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Hitachi Industrial Components & Equipment

MCB is applicable to electric circuit with rated voltage 230/400V, 240/415V AC, frequency 50/60Hz and rated current is up to 63A.
The product provides against overload and short circuit and equipments in household and commercial installations.
MCB is also used as non-frequent changeover of electric circuit.



BK63 series BTK63 series Alarm switch
(for BK63)
Auxiliary switch
8C-800C frame 8C-800C frame 8C-800C frame 8C-800C frame


Type B

Instant tripping characteristics : 3–5In
Application : computers and electronic equipments

Type C

Instant tripping characteristics : 5–10In
Application : general load such as bulbs , motors

Type D

Instant tripping characteristics : 10–20In
Application : high current surge device such as transformers, motors with heavy load


Easy to distinguish the rated current of the MCB by means of colored handle.

1A Black 20A Blue
2A Pink 25A Yellow
3A Pink 32A Purple
4A Brown 40A Black
6A Green 50A White
10A Red 63A Cupper-colored
16A Grey  


  • CE marking
  • CB Certifi cate

Rating & Specifications

Type BK63 BTK63
Protection Overload and short circuit
Rated current 1, 2, 3, 4, 6, 10, 16, 20, 25, 32, 40, 50, 63A
Characteristics B, C, D curve
Number of poles 1P, 1P+N, 2P, 3P, 3P+N, 4P
Breaking capacity 1P 2, 3, 4P 1P 2, 3, 4P
at 230/400VAC
at 400VAC
at 240/415VAC
at 415VAC
Standards IEC60898
Approval SEMKO CB scheme KEMA CB scheme
Type of trip Thermal magnetic release
Electrical endurance 6,000 operations 8,000 operations
Installation 35mm DIN rail
Width 17.8mm per pole
Type of terminal Lug type (Cable up to 25mm2)
Alarm switch
8C-800C frame
1changeover contact
6A at 230VAC,3A at 415VAC(AX)
6A at 230VAC,3A at 415VAC(AL)
2A at 48VAC,1A at 125VAC
Lug terminal
Cable capacity 2.5mm2
9mm wide
Not applicable
Dimension (mm) 8C-800C frame 8C-800C frame

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