Contactor 25A 1 NO/1 NC 48V 50-60HZ 2P

The Schneider Electric LC1D128E7 is a power contactor from the TeSys Deca range, designed primarily for switching resistive loads in electrical installations, control panels, automation systems, and HVAC applications. It features 4 power poles with a 2 NO + 2 NC configuration, a rated operational current of 25 A in AC-1 category up to 440 V, and a control coil of 48 V AC at 50/60 Hz.

In addition to its four main contacts, the contactor includes two auxiliary contacts as standard, 1 NO + 1 NC, making it easy to implement signaling, interlocking, and control functions without the need to add a basic auxiliary block. Its compact design, screw terminal connections, and the option for DIN rail or panel mounting make it easy to integrate into professional electrical panels.

Main features of the Schneider Electric LC1D128E7

• Schneider Electric power contactor.
• Range: TeSys Deca.
• Reference: LC1D128E7.
• Main application: switching resistive loads.
• Utilization category: AC-1.
• Number of power poles: 4P.
• Main contact configuration: 2 NO + 2 NC.
• Rated operational current: 25 A up to 440 V AC in AC-1.
• Conventional thermal current of the power circuit: 25 A at 60 °C.
• Control coil: 48 V AC.
• Coil frequency: 50/60 Hz.
• Integrated auxiliary contacts: 1 NO + 1 NC.
• Rated operational voltage of the power circuit: up to 690 V AC.
• Rated impulse withstand voltage Uimp: 6 kV.
• Connections via screw terminals.
• DIN rail or panel mounting.

4 power poles with 2 NO + 2 NC configuration

The LC1D128E7 has four main poles, arranged as two normally open contacts and two normally closed contacts. This configuration makes it suitable for circuits where simultaneous opening and closing of different lines is required through a single control command.

The main contacts provide a rated operational current of 25 A at voltages up to 440 V AC in AC-1 category, a category mainly intended for non-inductive or slightly inductive loads, such as electric heating systems and other resistive loads.

48 V AC 50/60 Hz control coil

The LC1D128E7 reference includes a 48 V AC control coil compatible with 50 and 60 Hz networks. When the control voltage is applied to the coil, the contactor simultaneously changes the state of its main and auxiliary contacts, allowing the load to be controlled from an independent control circuit.

This coil voltage is suitable for automation panels and control systems operating with a 48 V AC auxiliary supply.

Integrated 1 NO + 1 NC auxiliary contacts

The Schneider Electric LC1D128E7 comes factory-fitted with one normally open auxiliary contact and one normally closed auxiliary contact. These contacts can be used for interlocking, status indication, interlocking, or integration with other elements of the control circuit.

The conventional thermal current of the signaling circuit is 10 A at 60 °C. The auxiliary contacts are mechanically linked according to the characteristics defined by Schneider Electric for the TeSys range.

Electrical characteristics

Characteristic Value Brand Schneider Electric Range TeSys Deca Reference LC1D128E7 Product type Contactor Application Resistive load Utilization category AC-1 Number of poles 4P Main contacts 2 NO + 2 NC Rated operational current Ie 25 A up to 440 V AC in AC-1 Conventional thermal current Ith, power circuit 25 A at 60 °C Rated operational voltage Ue Up to 690 V AC, 25-400 Hz / up to 300 V DC Control circuit voltage Uc 48 V AC Control frequency 50/60 Hz Auxiliary contacts 1 NO + 1 NC Conventional thermal current of signaling circuit 10 A at 60 °C Rated impulse withstand voltage Uimp 6 kV Overvoltage category III

Making and breaking capacity

According to Schneider Electric specifications, the LC1D128E7 has a rated making capacity of 250 A at 440 V in the power circuit in accordance with IEC 60947. Its rated breaking capacity also reaches 250 A at 440 V under the conditions established by the standard.

For the power circuit, Schneider Electric specifies a permissible short-time current of 210 A for 1 second and 105 A for 10 seconds at 40 °C.

Fuse protection

For power circuit protection coordination, the technical documentation specifies fuses of up to 40 A gG for type 1 coordination and up to 25 A gG for type 2 coordination, at voltages up to 690 V, in accordance with IEC 60947.

The final selection of protection devices must be made taking into account the full characteristics of the installation and Schneider Electric coordination guidelines.

Mounting and connection

The contactor uses screw terminals for electrical connections, a common solution in industrial and commercial electrical panels due to its ease of installation and maintenance.

Its design allows DIN rail or direct panel mounting, making it easy to incorporate into distribution, automation, HVAC, and load control panels.

Compact dimensions

Characteristic Value Width 45 mm Height 85 mm Depth 92 mm

At just 45 mm wide, the LC1D128E7 enables compact configurations inside the electrical panel and can be complemented with different compatible accessories from the TeSys family.

Applications of the LC1D128E7 contactor

The Schneider Electric TeSys Deca LC1D128E7 is especially suited for switching resistive loads in AC-1 category. It can be used in electrical panels and control systems for heating, HVAC, electric heating elements, and other non-inductive or slightly inductive loads compatible with its rated characteristics.

Its 48 V AC coil allows integration into automation systems with control circuits at this voltage, while the built-in auxiliary contacts make it easy to coordinate with pushbuttons, relays, controllers, and other control circuit devices.

Standards

The contactor belongs to Schneider Electric's TeSys family and is designed in accordance with the main standards applicable to low-voltage contactors and electromechanical devices, including IEC 60947-4-1 and IEC 60947-5-1.

The LC1D128E7 combines a 25 A AC-1 rating, four 2 NO + 2 NC power poles, a 48 V AC 50/60 Hz coil, and 1 NO + 1 NC auxiliary contacts, offering a compact solution for switching and automating electrical loads in professional installations.