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MCBs technical details
Limitation of specific let-through energy I t
2

S800 N characteristics B, C and D
400 V let-through energy

200 A 125 A
80 A
10 5
160 A 50 A
32 A
Sine-shaped half-wave
125 A
20 A
13 A
Let-through energy I 2 t [A 2 s] 10 4 63 A 80 A 2
100 A
100 A
1

400 VAC/50 Hz
60˚

2 10 36
Prospective short-circuit current I [kA]
cc

200 A 100 A
10 5 63 A
160 A 40 A
Sine-shaped half-wave
25 A
125 A
16 A
Let-through energy I 2 t [A 2 s] 10 4 63 A 80 A 100 A 10 A

400 VAC/50 Hz
60˚

2 10 36
Prospective short-circuit current I [kA]
cc

 Min. pre-arching I 2 t, e.g. NH80 A gL/gG
 Max. let-through I 2 t, e.g. S803N-C20
Selectivity with respect to the upstream fuse to the point of intersection of both curves 1 and 2, e.g.
S801N-C20 to NH80A gL/gG: Selectivity up to min. 3.8 kA.