Schneider LC1D18M7 AC Contactor

Serie: TeSysD (TeSys Deca), import model (without suffix-C)

Decodificación de modelos

LC1D: Serie TeSys D 3-contactor de CA de polo

18: Rated operational current 18A under AC-3 utilization category

METRO: Coil voltage AC220V

7: Coil frequency 50/60Hz universal

LC1D18MC: Domestic-manufactured version; LC1D18M7: Overseas/imported version. Fully pin-to-pin compatible and interchangeable.

Especificaciones eléctricas básicas

Artículo	Parámetro
Circuito principal	3-polo, 3NO; AC‑3:18A; Max operating voltage 690V
Potencia nominal del motor (AC‑3)	220V:4kilovatios; 380‑400V:7.5kilovatios; 440V:9kilovatios
Contactos auxiliares	1NO + 1CAROLINA DEL NORTE (contactos espejo)
Bobina	AC220V 50/60Hz; Pick‑up 70VA, Holding 7‑7.5VA
Resistencia mecánica	15 million operations; Electrical endurance AC‑3:1.65 million operations
Montaje	35 mm DIN‑rail or screw‑mounting
Dimensiones generales	W45 × H77 × D86 mm; Net weight 0.33 kg
Par de terminales	Principal & circuito de control: 1.7 Nuevo Méjico
Temperatura de funcionamiento	‑40～+60 ℃; Derating required for 60‑70 ℃
Clase de protección	IP20

Asignación de terminales

Circuito principal: L1(1-1), L2(3-2), L3(5-3); T1(2-1), T2(4-2), T3(6-3)

Bobina: A1, A2 → AC220V power supply

Auxiliar: 13-14 (NO normalmente abierto), 21-22 (NC normalmente cerrado)

Selección & Reemplazo

Direct compatible domestic equivalent: LC1D18M7C (Local production, identical footprint, current and coil rating, ampliamente utilizado en proyectos)
Variantes de voltaje de bobina:

LC1D18B7: CA 24V

LC1D18F7: CA 110 V.

LC1D18Q7: CA380V

Domestic compatible alternatives: CJX2-1810 (1NO), CJX2-1801 (1CAROLINA DEL NORTE), CJX2-1811 (1NO+1NC) matches the auxiliary-contact configuration of this model.

Aplicaciones típicas

Direct-on-line switching of 3-phase motors, fans, bombas de agua, compresores, sistemas de climatización, low-voltage switchgear, arrancadores estrella-triángulo, cintas transportadoras; Standard AC-3 motor loads; Up to 32A for AC-1 resistive loads.

Solución de problemas & Notas de mantenimiento

Judge coil integrity by measuring resistance across A1-A2. Operating coil voltage shall remain within 0.8-1.1 × 220 V; Undervoltage causes chattering.
Auxiliary contacts rated max.5A, for control-signal circuits only. Do not switch power loads.
Tighten terminals to 1.7 N·m. Insufficient torque leads to overheating and burnt terminals.

Application Fields of Schneider LC1D18M7 AC Contactor

LC1D18M7 is a TeSys-D 3-pole 18A contactor, rated for 7.5 kW@400 V under AC-3 with AC220 V 50/60 Hz coil. It is widely deployed in industry, building services, HVAC and OEM equipment.

Maquinaria Industrial & Equipo

Direct start-stop control for 3-phase asynchronous motors: cintas transportadoras, mezcladores, muelas, bombas pequeñas, compresores de aire, ventiladores de ventilación.

Machine-tool equipment: Tornos, fresadoras, maquinaria de embalaje, printing equipment for main-circuit switching.

Star-delta starting circuits, motor-reversing circuits. Can be paired with thermal overload relays for motor overload protection.

Automation control cabinets: PLC outputs drive contactor coils to switch high-power loads.

climatización (Calefacción, Ventilation and Air-Conditioning)

Central air-conditioning units, cabinet fans, cooling-tower fans, circulating water pumps.

Fresh-air handling and exhaust systems, building electromechanical switch rooms.

AC220 V coil variants such as LC1D18M7 are extensively used in HVAC installations.

Servicios de construcción & Distribución de energía

Factory power panels, compact low-voltage distribution cabinets.

Water supply & drenaje: bombas de aguas residuales, bombas de refuerzo, drain-pump control.

Centralised lighting control (Max.32 A AC-1 resistive), switching for high-power heating elements and resistive loads.

Levantamiento & Almacenamiento Logístico

Small hoisting mechanisms, sistemas transportadores, equipo de clasificación.

Not suitable for heavy jog-lifting duty cycles (Select higher-endurance contactors for frequent jogging).

OEM Complete-Set Equipment

Used as standard component by machinery manufacturers: food-processing machines, auxiliary injection-moulding equipment, environmental-protection and water-treatment systems.

Limitaciones de la aplicación (Escenarios inadecuados)

Not intended for DC main-circuit switching (DC-type contactor required).
Avoid extremely frequent jogging / operación de ciclo alto, which drastically shortens electrical service life.
1NO+1NC auxiliary contacts are limited to control-level signals (max.5 A). Never carry main power loads.

Common Matching Accessories

Protección contra sobrecarga: LRD series thermal overload relays

Auxiliary-contact expansion: LADN auxiliary contact blocks

Coil surge suppression: LADRC surge suppressors to reduce electromagnetic interference