STC-D AC Contactor

STC-D AC Contactor is an electrical component used to remotely control and frequently turn on or off AC circuits. It is mainly used for opening and controlling circuits in electrical power systems and for remote control of motors, lighting and other electrical loads in industrial automation.Alternating Current (AC) Contactor, i.e. STC-D AC Contactor, is an important electrical control equipment, playing an irreplaceable role in the field of electric power system and industrial automation.

Model:STC-D

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Product Description

Type		STC-D09	STC-D12	STC-D18	STC-D25	STC-D32	STC-D40	STC-D50	STC-D65	STC-D80	STC-D95
Rated working current (A)	AC3	9	12	18	25	32	40	50	65	80	95
Rated working current (A)	AC4	3.5	5	7.7	8.5	12	18.5	24	28	37	44
Standardpower ratings of 3-phase motors 50/60Hz incategory AC-3	220/230V	2.2	3	4	5.5	7.5	11	15	18.5	22	25
	380/400V	4	5.5	7.5	11	15	18.5	22	30	37	45
	415V	4	5.5	9	11	15	22	25	37	45	45
	500V	5.5	7.5	10	15	18.5	22	30	37	55	55
	660/690V	5.5	7.5	10	15	18.5	30	33	37	45	55
Rated heat current (A)		20	20	32	40	50	60	80	80	125	125
Electrical life	AC3 (x104)	100	100	100	100	80	80	60	60	60	60
Electrical life	AC4 (x104)	20	20	20	20	20	15	15	15	10	10
Mechanical life (x104)		1000	1000	1000	1000	800	800	800	800	600	600
Number of the contacts	3P+NO					3P+NC+NO
Number of the contacts	3P+NC					3P+NC+NO

Structure and working principle

Structure: STC-D AC Contactor mainly consists of electromagnetic system (including iron core, coil and short-circuit ring, etc.), contact system (including main contact and auxiliary contact) and arc extinguishing device.

Working principle: When the coil of the STC-D AC Contactor is energized, the iron core generates a magnetic field, which attracts the armature and drives the contacts to act, so that the main contacts and auxiliary contacts are closed or disconnected, thus controlling the on-off of the circuit. Arc extinguishing device is used to extinguish the arc when the contacts are disconnected to protect the contacts from damage.

STC-D AC Contactor

Types and Characteristics

1.Types:

STC-D AC Contactors can be categorized into a variety of types according to their use and performance, such as industrial contactors, building and household contactors. Common models include CJ series (e.g. CJX2 series, CJ20 series, CJT1 series) as well as series products of ABB, Siemens, Schneider and other brands.

2.Features:

Reliable work: STC-D AC Contactors have high work reliability and stability, and can withstand large currents and voltages.

Stable performance: its contact system is made of high-quality materials with good electrical conductivity and high-temperature abrasion resistance.

Convenient maintenance: STC-D AC Contactors have a compact structure and are easy to install and maintain.

Application Scenarios

STC-D AC Contactors have a wide range of applications in power systems, industrial automation, building and household electrics. For example, in the power system, it can be used to control the start-stop and direction reversal of the motor; in industrial automation, it can be used to control the start-stop of various electrical equipments on the production line; in the building and household electrics, it can be used to control the on/off of the equipments, such as lighting and air-conditioning.

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