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Miniature Circuit Breakers
10kA & 15kA B, C & D Curve

Our 10kA & 15kA B, C & D Curve range of miniature circuit breakers allow you to ensure protection of circuits against short circuits, protection of circuits against overload current as well as giving control and isolation. The state of isolation is clearly indicated by the “OFF” mechanical position on the toggle in green.

Descriptions & Part Numbers

Single Pole MCBs
RatingWidth (17.5mm)Cat ref. “B” CurveCat ref. “C” CurveCat ref. “D” Cruve
0.5A
1 Mod
-
NCN100A
NDN100A
1A
1 Mod
-
NCN101A
NDN101A
2A
1 Mod
-
NCN102A
NDN102A
3A
1 Mod
-
NCN103A
NDN103A
4A
1 Mod
-
NCN104A
NDN104A
6A
1 Mod
NBN106A
NCN106A
NDN106A
10A
1 Mod
NBN110A
NCN110A
NDN110A
16A
1 Mod
NBN116A
NCN116A
NDN116A
20A
1 Mod
NBN120A
NCN120A
NDN120A
25A
1 Mod
NBN125A
NCN125A
NDN125A
32A
1 Mod
NBN132A
NCN132A
NDN132A
40A
1 Mod
NBN140A
NCN140A
NDN140A
50A
1 Mod
NBN150A
NCN150A
NDN150A
63A
1 Mod
NBN163A
NCN163A
NDN163A
Double Pole MCBs
RatingWidth (35mm)Cat ref. “B” CurveCat ref. “C” CurveCat ref. “D” Cruve
0.5A
2 Mod
-
NCN200A
NDN200A
1A
2 Mod
-
NCN201A
NDN201A
2A
2 Mod
-
NCN202A
NDN202A
3A
2 Mod
-
NCN203A
-
4A
2 Mod
-
NCN204A
NDN204A
6A
2 Mod
NBN206A
NCN206A
NDN206A
10A
2 Mod
NBN210A
NCN210A
NDN210A
16A
2 Mod
NBN216A
NCN216A
NDN216A
20A
2 Mod
NBN220A
NCN220A
NDN220A
25A
2 Mod
NBN225A
NCN225A
NDN225A
32A
2 Mod
NBN232A
NCN232A
NDN232A
40A
2 Mod
NBN240A
NCN240A
NDN240A
50A
2 Mod
NBN250A
NCN250A
NDN250A
63A
2 Mod
NBN263A
NCN263A
NDN263A
Triple Pole MCBs
RatingWidth (52.5mm)Cat ref. “B” CurveCat ref. “C” CurveCat ref. “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
RatingWidth (70mm)Cat ref. “B” CurveCat ref. “C” CurveCat ref. “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

Auxiliaries & Accessories for Devices, NBN, NCN, NDN 10kA MCBs

Auxiliaries & Accessories - Auxiliary Contacts 5A - 230V~
DescriptionWidth (8.75mm)Cat Ref.
1NO +1NC Allows remote indication of main contact status
½ Mod
MZ201
Auxiliaries & Accessories - Auxiliary Contacts and Alarm Indiction
DescriptionWidth (8.75mm)Cat Ref.
Allows indication of whether and alarm indication MCB has been turned off or tripped
½ Mod
MZ202
Auxiliaries & Accessories - Shunt Trip
DescriptionWidth (17.5mm)Cat Ref.
Allows remote tripping of the associated device. Operation of the coil is indicated by a flag on the product fascia.
 
 
 
 
 
230V - 415Vac
110V - 130Vdc
1 Mod
MZ203
24 - 48Vac
12 - 48Vdc
1 Mod
MZ204
Auxiliaries & Accessories - Under Voltage Release
DescriptionWidth (17.5mm)Cat Ref.
Allows MCB to be closed only when voltage is above 85% of Un. MCB will automatically trip when voltage falls to between 70-35% of Un. Operation of the coil is indicated by a flag on the product facia.
 
 
 
 
 
230Vac
1 Mod
MZ206
48Vdc
1 Mod
MZ205
Auxiliaries & Accessories - Locking Kit
DescriptionCat Ref.
Allows locking of the device in the off position.
Will accept two padlocks with hasps of 4.75mm diameter max.
(supplied without padlock)
MZN175

RCCB Add-on Blocks for MCB Devices, NBNM NCN, NDN

RCCB Add-on Blocks for MCB Devices - Double Pole RCCB Add-On Blocks
Sensitivity lΔnIn/AWidth (35mm)Cat ref.
30mA
63A
2 Mod
BD264
100mA
63A
2 Mod
BE264
300mA
63A
2 Mod
BF264
Time Delayed * 100mA
63A
2 Mod
BN264
Time Delayed * 300mA
63A
2 Mod
BP264
 
 
 
 
* Selective (time delay) versions are available in 100 & 300mA.
 
 
 
RCCB Add-on Blocks for MCB Devices - Four Pole RCCB Add-On Blocks
Sensitivity lΔnIn/AWidth (52.5mm)Cat ref.
30mA
63A
3 Mod
BD464
100mA
63A
3 Mod
BE464
300mA
63A
3 Mod
BF464
Time Delayed * 100mA
63A
3 Mod
BN464
Time Delayed * 300mA
63A
3 Mod
BP464
 
 
 
 
* Selective (time delay) versions are available in 100 & 300mA.