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4.4
General Catalogue • Protection Devices
Miniature Circuit Breakers (continued)
10kA & 15kA B, C & D Curve
Triple Pole MCBs
Rating
Width
Cat ref.
Cat ref.
Cat ref.
(52.5mm)
“B” Curve
“C” Curve
“D” Cruve
0.5A
3 Mod
-
NCN300A
NDN300A
1A
3 Mod
-
NCN301A
NDN301A
2A
3 Mod
-
NCN302A
NDN302A
3A
3 Mod
-
NCN303A
NDN303A
4A
3 Mod
-
NCN304A
NDN304A
6A
3 Mod
NBN306A
NCN306A
NDN306A
10A
3 Mod
NBN310A
NCN310A
NDN310A
16A
3 Mod
NBN316A
NCN316A
NDN316A
20A
3 Mod
NBN320A
NCN320A
NDN320A
25A
3 Mod
NBN325A
NCN325A
NDN325A
32A
3 Mod
NBN332A
NCN332A
NDN332A
40A
3 Mod
NBN340A
NCN340A
NDN340A
50A
3 Mod
NBN350A
NCN350A
NDN350A
63A
3 Mod
NBN363A
NCN363A
NDN363A
Four Pole MCBs
Rating
Width
Cat ref.
Cat ref.
Cat ref.
(70mm)
“B” Curve
“C” Curve
“D” Cruve
0.5A
4 Mod
-
NCN400A
NDN400A
1A
4 Mod
-
NCN401A
NDN401A
2A
4 Mod
-
NCN402A
NDN402A
3A
4 Mod
-
NCN403A
NDN403A
4A
4 Mod
-
NCN404A
NDN404A
6A
4 Mod
NBN406A
NCN406A
NDN406A
10A
4 Mod
NBN410A
NCN410A
NDN410A
16A
4 Mod
NBN416A
NCN416A
NDN416A
20A
4 Mod
NBN420A
NCN420A
NDN420A
25A
4 Mod
NBN425A
NCN425A
NDN425A
32A
4 Mod
NBN432A
NCN432A
NDN432A
40A
4 Mod
NBN440A
NCN440A
NDN440A
50A
4 Mod
NBN450A
NCN450A
NDN450A
63A
4 Mod
NBN463A
NCN463A
NDN463A
Description
These MCBs allow you to ensure
• Protection of circuits against
short circuits
• Protection of circuits against
overload current
• Control
• Isolation
Isolation
The state of isolation is clearly
indicated by the “OFF”
mechanical position on the
toggle with the green colour.
Will accept accessories, see
page 4.5.
Connection capacity
• 25mm
2
flexible conductor
• 35mm
2
rigid conductor
Complies with:
• BS EN 60898 (10kA)
• BS EN 60947-2 (15kA)
NCN316A
NCN416A