1P+N Miniature Circuit Breaker KNB5-40 6kA 40A

KNB5-40 series Miniature Circuit Breaker is nice in appearance, reasonable in structure, sound in feature and high in breaking capacity. Installed with standard din rail, it is convenient and easy in usage. It is mainly used in the line of AC 50/60Hz, rated working voltage to 240V, and rated current to 40A as protection against overload and short-circuit. It can be used as infrequent on-and-off operation and changeover. It complies with standard of IEC/EN60898-1.

Technical parameter

Frame class	40A
Rated working voltage	240V
Rated frequency	50/60Hz
Rated working current	1,2,3,4,5,6,10,16,20,25,32,40A
Making and breaking capacity	6000A
Release type	B,C,D
Poles	1P+N
Mechanical life	8000
Electric life	4000

The over-current tripping unit protection feature

Sequence NO.	Release	Test current I/In	Start state	Tripping time	Expected result
1	C	1.13In	Cold state	t≤1h	Not tripping
2	C	1.45In	Start right after the serial NO. 1 test	t<1h	Tripping
3	C	2.55In	Cold state	1s<t<60s(In≤32A) 1s<t<120s(In>32A)	Tripping
4	C	3In 5In 10In	Cold state	t≤0.1s	Not tripping
5	C	5In 10In 20In	Cold state	t<0.1s	Tripping