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MCBs technical details
Coordination tables: selectivity

Example
Upstream circuit-breaker S 200 P, curve D 50 A
Downstream circuit-breaker SN 201 L, curve B 10 A
Selectivity limit 10 In=500 A

MCB - SN201 @ 230/240 V
Supply S.2 S800 N-S S800 N-S S800 N-S
Load S.1 Char. B C D
Icu [kA] 36-50 36-50 36-50
In [A] 25 32 40 50 63 80 100 125 25 32 40 50 63 80 100 125 25 32 40 50 63 80 100 125
2 0.433 0.6 1.3 4 T T T 0.43 0.55 1.2 3 T T T T 1.3 4.1 T T T T T T
4 0.45 0.8 1.5 2.5 4 T 0.43 0.75 1.3 2.1 3.9 T T 0.8 1.6 3 5.4 T T T T
6 0.6 1.2 1.6 2.6 3.8 0.55 1.1 1.5 2.5 3.6 5.5 0.6 1.3 2 3.2 3.9 T T T
10 0.5 1.1 1.4 2 3 0.45 1 1.3 1.9 2.8 4.2 0.5 1.2 1.65 2.6 3.1 T T T
SN201 L B, C 6 16 0.8 1.2 1.7 2.5 0.75 1.1 1.6 2.3 3.6 0.9 1.4 1.8 2.6 5 T T
20 1 1.5 2.1 0.9 1.4 1.9 3.3 1.3 1.6 2.2 4.2 5.4 T
25 1.3 1.8 1.2 1.6 2.7 1.5 1.9 3.5 4.5 T
32 1.1 1.7 1 1.5 2.5 1.8 2.8 4.2 5.5
40 1.6 1.4 2.1 1.7 2.7 4 5
2 0.433 0.6 1.3 4 9 T T 0.43 0.55 1.2 3 6.6 T T T 1.3 4.1 T T T T T T
4 0.45 0.8 1.5 2.5 4 7.3 0.43 0.75 1.3 2.1 3.9 6.6 T 0.8 1.6 3 5.4 7.6 T T T
6 0.6 1.2 1.6 2.6 3.8 0.55 1.1 1.5 2.5 3.6 5.5 0.6 1.3 2 3.2 3.9 8 T T
10 0.5 1.1 1.4 2 3 0.45 1 1.3 1.9 2.8 4.2 0.5 1.2 1.65 2.6 3.1 6.2 8.6 T
SN201 B, C, D 10 16 0.8 1.2 1.7 2.5 0.75 1.1 1.6 2.3 3.6 0.9 1.4 1.8 2.6 5 6.3 8.8
20 1 1.5 2.1 0.9 1.4 1.9 3.3 1.3 1.6 2.2 4.2 5.4 7.6
25 1.3 1.8 1.2 1.6 2.7 1.5 1.9 3.5 4.5 6.6
32 1.1 1.7 1 1.5 2.5 1.8 2.8 4.2 5.5
40 1.6 1.4 2.1 1.7 2.7 4 5
2 0.433 0.6 1.3 4 9 T T 0.43 0.55 1.2 3 6.6 T T T 1.3 4.1 T T T T T T
4 0.45 0.8 1.5 2.5 4 7.3 0.43 0.75 1.3 2.1 3.9 6.6 T 0.8 1.6 3 5.4 7.6 T T T
6 0.6 1.2 1.6 2.6 3.8 0.55 1.1 1.5 2.5 3.6 5.5 0.6 1.3 2 3.2 3.9 8 T T
10 0.5 1.1 1.4 2 3 0.45 1 1.3 1.9 2.8 4.2 0.5 1.2 1.65 2.6 3.1 6.2 8.6 T
SN201 M B, C 10 16 0.8 1.2 1.7 2.5 0.75 1.1 1.6 2.3 3.6 0.9 1.4 1.8 2.6 5 6.3 8.8
20 1 1.5 2.1 0.9 1.4 1.9 3.3 1.3 1.6 2.2 4.2 5.4 7.6
25 1.3 1.8 1.2 1.6 2.7 1.5 1.9 3.5 4.5 6.6
32 1.1 1.7 1 1.5 2.5 1.8 2.8 4.2 5.5
40 1.6 1.4 2.1 1.7 2.7 4 5

1 Load side circuit-breaker 1P+N (230/240 V)
2 For networks with 230/240 V AC ⇒ two-pole circuit-breaker (phase + neutral)
for networks at 400/415 V AC ⇒ four-pole circuit-breaker (load side circuit branched between one phase and the neutral)
3 Only for curve B