Contactor 32A 1 NO/1 NC 24V 50-60HZ

The Schneider Electric TeSys Deca LC1D32B7 contactor is a 3-pole power contactor with 3 normally open main contacts, designed for controlling motors and other electrical loads in industrial, commercial, and HVAC installations. It supports a rated operational current of 32 A in AC-3/AC-3e category up to 440 V, can control motors up to 15 kW at 380-400 V, and includes a 24 V AC control coil at 50/60 Hz.

In addition to its three main power contacts, the LC1D32B7 integrates as standard 1 normally open auxiliary contact and 1 normally closed auxiliary contact. Its compact design, screw terminals, and the possibility of rail or panel mounting make it easy to integrate into automation panels, motor starters, and HVAC systems.

32 A contactor for motor control

The Schneider Electric LC1D32B7 is specifically designed for switching electric motors on and off. In AC-3 utilization category, used for starting and stopping squirrel-cage motors, it supports a rated current of 32 A up to 440 V under the conditions specified by Schneider Electric.

Its three-pole configuration allows the three phases of a three-phase supply to be switched simultaneously by an independent signal applied to the control coil.

Motor power up to 15 kW at 400 V

In AC-3 applications, Schneider Electric specifies the following motor power ratings for this contactor:

• 220-230 V AC: up to 7.5 kW.
• 380-400 V AC: up to 15 kW.
• 415-440 V AC: up to 15 kW.
• 500 V AC: up to 18.5 kW.
• 660-690 V AC: up to 18.5 kW.

Final selection should be made taking into account the motor rated current, supply voltage, starting method, utilization category, and expected switching frequency.

32 A in AC-3 and up to 50 A in AC-1

In addition to motor applications, the LC1D32B7 can be used to switch resistive or slightly inductive loads. In AC-1 category it supports up to 50 A at voltages up to 440 V and at an ambient temperature of up to 60 °C, within the conditions established by Schneider Electric.

This expands its use in electric heaters, heating systems, HVAC equipment, and other AC-1 compatible applications.

24 V AC control coil

The B7 suffix identifies a 24 V AC control coil at 50/60 Hz. This voltage is common in automation panels and allows the contactor to be operated from relays, controllers, thermostats, PLCs, and other compatible control systems.

The coil provides functional separation between the power circuit and the control circuit, allowing high-power three-phase loads to be controlled from a low-voltage control circuit.

3 normally open main contacts

The power circuit configuration is 3 poles with 3 normally open contacts, 3P (3 NO). When the coil is energized, the three main contacts close simultaneously and supply the load.

When the control voltage is removed, the mechanism returns the contacts to their rest position and disconnects the power circuit.

Integrated 1 NO + 1 NC auxiliary contacts

The contactor includes from the factory one normally open auxiliary contact and one normally closed auxiliary contact. These contacts can be used for signaling, interlocking, status feedback, and automation functions.

• Power contacts: 3 NO.
• Auxiliary contacts: 1 NO + 1 NC.
• Minimum auxiliary circuit switching current: 5 mA.
• Minimum switching voltage: 17 V.

The auxiliaries are mechanically linked in accordance with IEC 60947-5-1, and the NC contact has mirror contact function according to IEC 60947-4-1.

Compatible with industrial and HVAC applications

Schneider Electric positions the TeSys Deca range for industrial control and HVAC applications. The LC1D32B7 can be used, provided it is correctly sized, in equipment such as:

• Three-phase electric motors.
• Water pumps.
• Fans and extractors.
• Compressors.
• Air conditioning and HVAC equipment.
• Industrial machinery.
• Conveyor systems.
• Electric heaters.
• Automation and control panels.

Operational voltage up to 690 V AC

The main circuit is designed to operate with a rated operational voltage of up to 690 V AC, with frequencies between 25 and 400 Hz within the conditions stated in the technical documentation.

The rated impulse withstand voltage Uimp is 6 kV, providing suitable dielectric characteristics for professional low-voltage installations.

Screw terminals

The LC1D32B7 reference uses screw terminals for both the power circuit and the control circuit. This system provides a robust connection and simplifies routine installation and maintenance tasks.

In the main circuit it accepts conductors up to 10 mm² in different configurations, while the control terminals accept cross-sections up to 4 mm², depending on the number of conductors and the use of ferrules.

Rail or panel mounting

The contactor is designed for installation on DIN rail or directly on a panel, allowing it to adapt to different electrical panel designs.

Its width of approximately 45 mm makes it easy to integrate several switching and protection devices within a limited space.

Compact design

The contactor body has approximate dimensions of:

• Width: 45 mm.
• Height: 85 mm.
• Depth: approximately 90-92 mm depending on front configuration.
• Net weight: approximately 0.375 kg.

Dimensions may increase when adding auxiliary blocks, timers, or other compatible accessories.

High mechanical durability

Schneider Electric specifies a mechanical durability of up to 15 million cycles, suitable for automation applications with a high number of operations.

Electrical durability depends on current and utilization category. Under the conditions indicated by the manufacturer, values of up to 1.65 million cycles at 32 A in AC-3 are specified, among others.

The maximum operating frequency can reach 3,600 cycles per hour at 60 °C, always within the corresponding utilization conditions.

Fast closing and opening times

The electromagnetic mechanism offers short switching times:

• Closing time: approximately 12-22 ms.
• Opening time: approximately 4-19 ms.

These performance characteristics allow integration into automation systems that require fast and repetitive response.

IP20 protection rating

The front face of the contactor offers an IP20 protection rating in accordance with IEC 60529. As a panel component, it must be installed inside an enclosure suitable for the environment and the protection level required for the installation.

Compatible with TeSys accessories

The Schneider Electric TeSys range offers numerous accessories that expand the contactor’s functions, including:

• Additional auxiliary contact blocks.
• Motor thermal overload relays.
• Mechanical interlocks.
• Timer modules.
• Signaling accessories.
• Coil surge suppressors.
• Accessories for reversing and star-delta configurations.

Compatibility must be checked with the specific reference of each accessory and with the final panel configuration.

Schneider Electric LC1D32B7 technical characteristics

• Brand: Schneider Electric.
• Reference: LC1D32B7.
• Range: TeSys Deca.
• Type: power contactor.
• Application: motor control and resistive loads.
• Number of poles: 3P.
• Main contacts: 3 NO.
• Integrated auxiliary contacts: 1 NO + 1 NC.
• Rated current AC-3/AC-3e: 32 A up to 440 V.
• Rated current AC-1: 50 A up to 440 V at 60 °C.
• Motor power at 380-400 V AC-3: 15 kW.
• Motor power at 220-230 V AC-3: 7.5 kW.
• Motor power at 500 V AC-3: 18.5 kW.
• Motor power at 660-690 V AC-3: 18.5 kW.
• Coil: 24 V AC.
• Coil frequency: 50/60 Hz.
• Operational voltage of power circuit: up to 690 V AC.
• Uimp: 6 kV.
• Terminals: screw.
• Mounting: rail or panel.
• Mechanical durability: up to 15 million cycles.
• Maximum switching frequency: up to 3,600 cycles/h.
• Closing time: 12-22 ms.
• Opening time: 4-19 ms.
• Front protection rating: IP20.
• Width: approximately 45 mm.
• Height: approximately 85 mm.
• Depth: approximately 90-92 mm.
• Net weight: approximately 0.375 kg.
• Main standards: IEC/EN 60947-4-1 and IEC/EN 60947-5-1.

Compact contactor for motors up to 15 kW

The Schneider Electric TeSys Deca LC1D32B7 combines a 32 A AC-3 rating, motor power up to 15 kW at 400 V, a 24 V AC coil, and 1 NO + 1 NC auxiliary contacts in a compact format for professional panels.

Its versatility, the possibility of rail or panel mounting, and the wide range of TeSys accessories make this contactor a particularly suitable solution for controlling motors, pumps, fans, HVAC equipment, and industrial automation systems.

Important: the contactor performs switching functions and does not replace overload or short-circuit protection. In motor applications, it must be combined with the appropriate motor protection switch, overload relay, and short-circuit protection according to the characteristics of the circuit.