Overload protection Short circuit protection Isolation Controlling
Test Current | Tripping Time |
1.13ln | t≥1h(ln≤63A) Non-Tripping |
1.45ln | t<1h(ln≤63A) Tripping |
2.55ln | 1s<t<60s(ln≤32A) Tripping 1s<t<120s(ln>32A) |
Used in residential building. non-residential building, energy, industry and infrastrure
Rated current ln(A): 2,4,6,10,16,20,25,32,40,50,63
Rated voltage Ue(AC):230/ 400V
Operational voltage(AC): Min.24V Max.250/ 440V
Rated insulation voltage(AC): 500V
Tripping Characteristics: B,C,D
Degree of protection: IP40(top), IP20(terminal), with connected conductors
Electrical life(0-C): 8,000
Mechanical life(0-C): 20,000
Max fuse: 100gL(>10KA)
Model | Rated voltage(V) | Icu=Ics(KA) | Ics(KA) | Standards |
Mk7-63 | 1P:230 | 6 | 6 | IEC60898-1 |
2-4P:400 | 6 | 6 | IEC60898-1 |
Fire resistance according to UL 94: Vo
Terminal tightening torque(N.m): 2.5-3
Magentic release
An electromagnet with plunger ensure instantaneous tripping in case of short circuit. The IEC60898 distinguishes three different types, following the current for instaneous release: type B,C,D
Test Current |
Tripping Time | Applications | |
B | 3In 5In | t≥0.1s NonTripping t<0.1s Tripping | Only for resistive loads such as: -electrical heating -water heater -stoves |
C | 5In 10In | t≥0.1 NonTripping t<0.1s Tripping | Usual loads such as: -lighting -socket outlets -small motors |
D | 10In 20In | t≥0.1s NonTripping t<0.1s Tripping | Control and protection of circuits having important transient inrush currents(large motors) |
Thermal release
The release is initiated by a bimetal strip in case of overload
The standard defines the range of release for specific overload values
Reference ambient temperature is 30°C
Test Current | Tripping Time | |
1.13In | t≥1h(In≤63A) | Non-Tripping |
1.45In | t<1h(In≤63A) | Tripping |
2.55In | 1s<t<60s(In≤32A) 1s<t<120s(In>32A) | Tripping |
Rated current ln(A): 2,4,6,10,16,20,25,32,40,50,63
Rated voltage Ue(AC):230/ 400V
Operational voltage(AC): Min.24V Max.250/ 440V
Rated insulation voltage(AC): 500V
Tripping Characteristics: B,C,D
Degree of protection: IP40(top), IP20(terminal), with connected conductors
Electrical life(0-C): 8,000
Mechanical life(0-C): 20,000
Max fuse: 100gL(>10KA)
2P DC miniature circuit breaker