MM5 plastic shell circuit breaker-Mueller Electric (Group) Co., Ltd

The power distribution IoT low-voltage intelligent switch (hereinafter referred to as circuit breaker) is a new generation of circuit breaker developed by the company in combination with the existing domestic and foreign power IoT and digital grid construction needs. This product not only has the advantages of small shape and size, high breaking ability, short arc distance, strong vibration resistance, stable and reliable performance, but also has functions such as supporting misalignment analysis of electricity meters, rapid positioning of faults, diversified communication forms and convenient operation and maintenance. It is an indispensable protective component and sensor device for various power data in the construction of the Internet of Things, a digital power grid. Its rated insulation voltage can reach 1150V, suitable for AC 50/60Hz, rated operating voltage to 400V (690V), and rated current to 630A, is used to distribute power and protect the circuit and power supply equipment from damage caused by overload, short circuit, undervoltage and other faults. It can also be used as an infrequent starting and overloading, short circuit and undervoltage protection for motors.

The product complies with the standards: IEC60947-2, GB/T14048.2.

Model meaning

Codename	project	Codename	project
①	Company code: Shanghai Muller	⑤	Case frame grade rated current: 250, 400, 630
②	Product code: Plastic housing circuit breaker	⑥	Dividing ability: N, S, H
③	Design code: 5	⑦	Number of poles: 3P, 4P
④	None: Thermal magnetic type, i: electronic type, Y: liquid crystal, J: metering	⑧	Rated current

Main technical parameters

Specifications and models		MM5□-125	MM5□-250	MM5□-400	MM5□-630
Pole number		3P、4P
Rated current In		0.4~1.0In adjustable (step distance 1A)
Rated operating voltage Ue(V)		AC400V
Rated frequency		50/60Hz
Rated insulation voltage Ui(V)		1000
Rated impact withstand voltage Uimp(kV)		8		12
Trip type		Electronic/Thermal magnetic
Use Category		B
Extreme short circuit breaking capability Icu(kA)	N	35		50
	S	50		65
	H	65		80
Extreme short circuit breaking capability Ics(kA)	N	25		35
	S	35		50
	H	50		65
Short-term withstand current Icw (kA/1s)		5		10

Appearance and installation dimensions

model	External dimensions											Wiring screws
MM5□	A	A1	B	B1	B3	H	H1	H2	H3	A2	B2
125/250	105	70	175	145	65	128	110.5	84.5	26.5	35	136	M8
400/630	141	87	260	227.5	65	154.5	122.5	96.5	33	43.5	197	M10