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Contactors (Electromechanical)

A contactor, contactor switch, or contactor relay is a device used to turn on or off an electrical circuit. They belong to the relay family, but the primary distinction is the employment of a contractor in applications with larger current capacities. Motors, lighting circuits, heaters, and other electrical loads commonly employ contractors. A contractor can work alone, as a power control tool, or as a component of a motor starter. Our thorough contractor's guide has further information.

Contactor Specifications

There are various types of contractors, and each type has its own set of specifications based on your application. Some essential specifications are

  • AC Contactor or DC Contactor with coils such as 12 V, 24 V, 48 V, 110 V, 240 V, 400 V, and 440 V.
  • Reversing or non-reversing functionality.
  • AC3 and AC1 categories.
  • Contactors with 2 poles, 3 poles, 4 poles, and even 8 and 10 pole variants.
  • Various contact configurations.
  • IEC standards

What is the Purpose of Electrical Contractors?

Contactors have spring-loaded contacts that may make or break power supply lines to a load and are made to be linked to high-current load devices. To help with arc suppression, these contacts are made to open and close very quickly. As a result, the contractor may interrupt strong motor currents with less damage over a longer life cycle. A contactor is widely used in devices that are regularly turned on and off, and many contactor designs are created for various current needs. Contactors are used in a wide range of applications, from simple light switches to more complicated ones like regulating electromagnets.

How Do Contractors Work?

Contrary to normal relays, contactors electromechanical are made expressly to be connected to high current load devices. A contactor is a switch that can be operated remotely and is used in larger-scale control circuit applications because it is made to switch a significant quantity of electrical power across its contacts. A device is referred to as a contactor if it can switch more than 10 amperes. Additionally, these devices have high coil voltages, which are uncommon in relays.


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3RT1054-6AF36, Siemens
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3RT1054-6AP36, Siemens
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3RT1064-6AP36, Siemens
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3RT1054-6AM36, Siemens
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3RT1054-6AR36, Siemens
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3RT1055-6AD36, Siemens
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3RT1055-6AV36, Siemens
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3RT1056-6AR36, Siemens
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3RT1056-6NF36, Siemens
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3RT1064-6AS36, Siemens
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3RT1064-6PF35, Siemens
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3RT1065-6AS36, Siemens
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3RT1065-6NB36, Siemens
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3RT1066-6NB36, Siemens
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3RT1075-6NB36, Siemens
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3RT1076-6AB36, Siemens
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3RT1076-6NB36, Siemens
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3RT1264-6AS36, Siemens
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3RT1055-6AF36, Siemens

3RT1055-6AF36, Siemens

Contactors - 3RT Range, Screw Connections The 3RT Range of Siemens Contactors. All models are highly reliable and extremely good quality. Screw Connection All models vary with Current rating and Voltage. Various NO/NC Values Siemens Sirius Range Contactor & Control Relays Siemens control gear for feeders up to 5.5kW. The complementary nature of the devices allows fast and simple assembly, for example, of motor starters and reversers. A perfect match between contactors, overloads, circuit breakers and accessories for the same power ratings provides a uniform panel appearance and the standard widths with no side-by-side mounting derating allows for space saving.
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3RT1076-6AF36, Siemens

3RT1076-6AF36, Siemens

The Siemens 3RT1 power contactor offer convincing performance from a compact design with high contact reliability. They can be combined with a variety of other components in the load feeder. The contactors offer the best connection to the automation level for every application (direct or via PLC input).The 3RT1 contactor are climate-resistant, approved for worldwide use (e.g. IEC and UL/CSA) and are IE3/IE4-ready. They can be operated with AC or DC, and some versions have a wide voltage range and a PLC control input. The devices can be connected in the main circuit by means of rails or box terminals. For the auxiliary and control circuit they are also available with spring-type terminals for fast, maintenance-free and vibration-proof connection. The contactor are available in various sizes and in a wide performance range Pre-installed auxiliary switches reduce the complexity of your design
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3RT1054-6AF36, Siemens

3RT1054-6AF36, Siemens

Contactors - 3RT10 Range The Siemens 3RT10 Range of Contactors will provide excellent reliability and are of extremely good quality. Various NO/NC models available. Maximum switching voltage 690V Mechanical life 3 x 10 7 operations Key Characteristics Size DC coil AC coil (Sealed/Inrush) Height (mm) Width (mm) Depth (mm) S00 3.2W 4.6/ 27VA 57.5 45 100.5 S0 5.4W 7.8/ 61VA 80 45 90 S2 (15kW) 11.5W 11/ 90VA 105 55 115 S2 (18 & 22kW) 11.5W 13.5/ 127VA 105 55 130 S3 (30kW) 15W 21/ 218VA 140 70 140 S3 (37 & 45kW) 15W 22/ 270VA 140 70 152.5 Note Stock 7515562 - Coils supplied separately Approvals UL/CSA Standards IEC947, VDE0660, EN60947 Siemens Sirius Range Contactor & Control Relays Siemens control gear for feeders up to 5.5kW. The complementary nature of the devices allows fast and simple assembly, for example, of motor starters and reversers. A perfect match between contactors, overloads, circuit breakers and accessories for the same power ratings provides a uniform panel appearance and the standard widths with no side-by-side mounting derating allows for space saving.
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3RT1054-6AP36, Siemens

3RT1054-6AP36, Siemens

Contactors - 3RT10 Range The Siemens 3RT10 Range of Contactors will provide excellent reliability and are of extremely good quality. Various NO/NC models available. Maximum switching voltage 690V Mechanical life 3 x 10 7 operations Key Characteristics Size DC coil AC coil (Sealed/Inrush) Height (mm) Width (mm) Depth (mm) S00 3.2W 4.6/ 27VA 57.5 45 100.5 S0 5.4W 7.8/ 61VA 80 45 90 S2 (15kW) 11.5W 11/ 90VA 105 55 115 S2 (18 & 22kW) 11.5W 13.5/ 127VA 105 55 130 S3 (30kW) 15W 21/ 218VA 140 70 140 S3 (37 & 45kW) 15W 22/ 270VA 140 70 152.5 Note Stock 7515562 - Coils supplied separately Approvals UL/CSA Standards IEC947, VDE0660, EN60947 Siemens Sirius Range Contactor & Control Relays Siemens control gear for feeders up to 5.5kW. The complementary nature of the devices allows fast and simple assembly, for example, of motor starters and reversers. A perfect match between contactors, overloads, circuit breakers and accessories for the same power ratings provides a uniform panel appearance and the standard widths with no side-by-side mounting derating allows for space saving.
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3RT1055-6AV36, Siemens

3RT1055-6AV36, Siemens

CONTACTOR S6 150A 380-420VUC 3P
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LC1G150EHEA, Schneider Electric

LC1G150EHEA, Schneider Electric

CONTACTORTESYSGIGA150 3P ADV48-1
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LC1G1854BEEA, Schneider Electric

LC1G1854BEEA, Schneider Electric

CONTACTORTESYSGIGA185 4P ADV 24-
New items
3RT1055-6NB36, Siemens

3RT1055-6NB36, Siemens

The Siemens 3RT1 power contactor offer convincing performance from a compact design with high contact reliability. They can be combined with a variety of other components in the load feeder. The contactors offer the best connection to the automation level for every application (direct or via PLC input).The 3RT1 contactor are climate-resistant, approved for worldwide use (e.g. IEC and UL/CSA) and are IE3/IE4-ready. They can be operated with AC or DC, and some versions have a wide voltage range and a PLC control input. The devices can be connected in the main circuit by means of rails or box terminals. For the auxiliary and control circuit they are also available with spring-type terminals for fast, maintenance-free and vibration-proof connection The contactor are available in various sizes and in a wide performance range Pre-installed auxiliary switches reduce the complexity of your design
New items
3RT1056-6AP36, Siemens

3RT1056-6AP36, Siemens

Contactors - 3RT10 Range The Siemens 3RT10 Range of Contactors will provide excellent reliability and are of extremely good quality. Various NO/NC models available. Maximum switching voltage 690V Mechanical life 3 x 10 7 operations Key Characteristics Size DC coil AC coil (Sealed/Inrush) Height (mm) Width (mm) Depth (mm) S00 3.2W 4.6/ 27VA 57.5 45 100.5 S0 5.4W 7.8/ 61VA 80 45 90 S2 (15kW) 11.5W 11/ 90VA 105 55 115 S2 (18 & 22kW) 11.5W 13.5/ 127VA 105 55 130 S3 (30kW) 15W 21/ 218VA 140 70 140 S3 (37 & 45kW) 15W 22/ 270VA 140 70 152.5 Note Stock 7515562 - Coils supplied separately Approvals UL/CSA Standards IEC947, VDE0660, EN60947 Siemens Sirius Range Contactor & Control Relays Siemens control gear for feeders up to 5.5kW. The complementary nature of the devices allows fast and simple assembly, for example, of motor starters and reversers. A perfect match between contactors, overloads, circuit breakers and accessories for the same power ratings provides a uniform panel appearance and the standard widths with no side-by-side mounting derating allows for space saving.
New items
3RT20181AK61, Siemens

3RT20181AK61, Siemens

Contactors - 3RT Range, Screw Connections The 3RT Range of Siemens Contactors. All models are highly reliable and extremely good quality. Screw Connection All models vary with Current rating and Voltage. Various NO/NC Values Siemens Sirius Range Contactor and Control Relays Siemens Sirius Range Contactor & Control Relays Siemens control gear for feeders up to 5.5kW. The complementary nature of the devices allows fast and simple assembly, for example, of motor starters and reversers. A perfect match between contactors, overloads, circuit breakers and accessories for the same power ratings provides a uniform panel appearance and the standard widths with no side-by-side mounting derating allows for space saving.
New items
3RT20171BB443MA0, Siemens

3RT20171BB443MA0, Siemens

Contactors - 3RT Range, Screw Connections The 3RT Range of Siemens Contactors. All models are highly reliable and extremely good quality. Screw Connection All models vary with Current rating and Voltage. Various NO/NC Values Siemens Sirius Range Contactor & Control Relays Siemens control gear for feeders up to 5.5kW. The complementary nature of the devices allows fast and simple assembly, for example, of motor starters and reversers. A perfect match between contactors, overloads, circuit breakers and accessories for the same power ratings provides a uniform panel appearance and the standard widths with no side-by-side mounting derating allows for space saving.
New items
3RT20261AC20, Siemens

3RT20261AC20, Siemens

Contactors - 3RT Range, Screw Connections The 3RT Range of Siemens Contactors. All models are highly reliable and extremely good quality. Screw Connection All models vary with Current rating and Voltage. Various NO/NC Values Siemens Sirius Range Contactor & Control Relays Siemens control gear for feeders up to 5.5kW. The complementary nature of the devices allows fast and simple assembly, for example, of motor starters and reversers. A perfect match between contactors, overloads, circuit breakers and accessories for the same power ratings provides a uniform panel appearance and the standard widths with no side-by-side mounting derating allows for space saving.
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