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Stm8-63 Miniature Circuit Breaker 6ka 1p 2p 3p 4p 16A 230/400V

SONTUOEC is one of the Chinese suppliers/manufacturers specializing in the production of various small electrical appliances STM8-63 Series high breaking miniature circuit breaker has the features of structure advanced, performance reliable, breaking capacity high, appearance elegant and its shell and parts are made of material with impact resistance, strong flame-retardant feature. It is suitable to power system of AC 50/60Hz, rated voltage of 230/400V, and rated current up to 63A. It is mainly applied at office building, residence, for lighting, power distribution and overload and short circuit protection of equipment. Normally, it also can be used as the not frequent transfer of power system. It conforms to the standards IEC60898-1.

Model:STM8-63

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Product Description

Specifications:

	Standard		IEC/EN 60898-1
Electrical features	Rated current In	A	1,2,4,6,10,16,20,25,32,40,50,63
	Poles	P	1,2,3,4
	Rated voltage Ue	V	AC 230, 400
	Insulation voltage Ui	V	500
	Rated frequency	Hz	50/60
	Rated breaking capacity	A	3000, 4500, 6000
	Rated impulse withstand voltage(1.2/50)Uimp	V	4000
	Dielectric test voltage at ind.Freq.for 1 min	Kv	2
	Pollution degree		2
	Thermo-magnetic release characteristic		B,C,D
Mechanical features	Electrical life	t	4000
	Mechanical life	t	10000
	Protection degree		IP20
	Reference temperature for setting	ºC	30
	of thermal element	ºC	30
	Ambient temperature	ºC	-5~+40(Special application please refer to
	(with daily average ≤35ºC)	ºC	temperature compensation correction)
	Storage temperature	ºC	-25~+70
Installation	Terminal connection type		Cable/Pin-type busbar
	Terminal size top/bottom for cable	mm²	25
	Terminal size top/bottom for cable	AWG	3月18日
	Therminal size top/bottom for busbar	mm²	25
	Therminal size top/bottom for busbar	AWG	3月18日
	Tightening torque	N^*m	2
	Tightening torque	In-lbs	18
	Mounting		on DIN rail EN 60715(35mm)by means of fast clip device
	Connection		From top and bottom

Main functions of STB1-63 Miniature Circuit Breaker

1.Overload protection: When the current in the circuit exceeds the rated value of the MCB, the STB1-63 Miniature Circuit Breakerwill automatically cut off the circuit within a set period of time to prevent the circuit and equipment from overheating.

2.Short-circuit protection: When a short-circuit occurs in the circuit, the STB1-63 Miniature Circuit Breakerwill cut off the circuit immediately to prevent the short-circuit current from damaging the circuit and equipment.

3.Leakage protection (some MCBs have this function): for MCBs with leakage protection, when there is leakage in the circuit, the STB1-63 Miniature Circuit Breakerwill quickly cut off the circuit to protect personal safety.

Principle of operation of MCBs

MCBs usually contain a thermal magnetic or electronic trip detector inside, which is used to detect changes in the current in the circuit. When the current is abnormal, the striker triggers the tripping mechanism of the MCB, causing the STB1-63 Miniature Circuit Breakerto quickly cut off the circuit.

1.Thermal magnetic striker: It utilizes the heat generated when the current passes through the conductor to trigger the tripping. When the current is too large, the conductor heats up, causing the bimetal inside the thermal magnetic striker to bend, thus triggering the tripping mechanism.

2.Electronic striker: It utilizes electronic components to detect current changes and control the action of the tripping mechanism. When an abnormal current is detected, the electronic striker sends a signal to the tripping mechanism to cut off the circuit.

Application Scenarios of MCB

MCBs are widely used in electrical systems in residential, commercial and industrial areas to protect circuits and equipment from damage caused by abnormal currents. They are usually installed in distribution boxes, switchboards or control cabinets and are used as the main switch or branch switch of a circuit.

Selection and Installation of MCBs

1.Selection: When selecting MCBs, you need to consider factors such as the rated current of the circuit, voltage level, protection characteristics, and whether leakage protection is required. It is also important to ensure that the selected STB1-63 Miniature Circuit Breakercomplies with local electrical safety standards and regulations.

2.Installation: The STB1-63 Miniature Circuit Breakershould be installed in a dry, ventilated environment free of corrosive gases and ensure that it is wired correctly and securely. During installation, relevant electrical safety regulations and operating procedures should be observed.

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