Schneider LC1D18M7 AC Contactor

Série: TeSys D (TeSys Deca), import model (without suffix-C)

Decodificação de modelo

LC1D: Série TeSys D 3-contator CA de pólo

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

M: Coil voltage AC220V

7: Coil frequency 50/60Hz universal

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

Especificações elétricas principais

Item	Parâmetro
Circuito Principal	3-pólo, 3NÃO; AC-3:18UM; Max operating voltage 690V
Potência nominal do motor (AC-3)	220V:4kW; 380-400V:7.5kW; 440V:9kW
Contatos Auxiliares	1NÃO + 1NC (mirror contacts)
Bobina	AC220V 50/60Hz; Pick‑up 70VA, Holding 7‑7.5VA
Resistência Mecânica	15 milhões de operações; Electrical endurance AC‑3:1.65 milhões de operações
Montagem	35 mm DIN‑rail or screw‑mounting
Dimensões Gerais	W45 × H77 × D86 mm; Net weight 0.33 kg
Torque Terminal	Principal & circuito de controle: 1.7 N·m
Temperatura operacional	‑40～+60 ℃; Derating required for 60‑70 ℃
Classe de Proteção	IP20

Atribuição de terminais

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 (NÃO Normalmente aberto), 21-22 (NC Normally Closed)

Seleção & Substituição

Direct compatible domestic equivalent: LC1D18M7C (Local production, identical footprint, current and coil rating, amplamente utilizado em projetos)
Variantes de tensão da bobina:

LC1D18B7: CA24V

LC1D18F7: AC110V

LC1D18Q7: AC380V

Domestic compatible alternatives: CJX2-1810 (1NÃO), CJX2-1801 (1NC), CJX2-1811 (1NÃO+1NC) matches the auxiliary-contact configuration of this model.

Aplicações Típicas

Direct-on-line switching of 3-phase motors, fãs, bombas de água, compressores, Sistemas HVAC, low-voltage switchgear, arrancadores estrela-triângulo, correias transportadoras; Standard AC-3 motor loads; Up to 32A for AC-1 resistive loads.

Solução de problemas & Notas de manutenção

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.

Campos de aplicação de 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, serviços de construção, HVAC and OEM equipment.

Máquinas Industriais & Equipamento

Direct start-stop control for 3-phase asynchronous motors: correias transportadoras, misturadores, moedores, bombas pequenas, compressores de ar, ventiladores.

Machine-tool equipment: Tornos, fresadoras, máquinas de embalagem, 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.

AVAC (Aquecimento, Ventilation and Air-Conditioning)

Central air-conditioning units, cabinet fans, cooling-tower fans, bombas de água circulantes.

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

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

Serviços de construção & Distribuição de energia

Factory power panels, compact low-voltage distribution cabinets.

Fornecimento de água & drenagem: Bombas de esgoto, bombas de reforço, drain-pump control.

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

Elevação & Armazenagem Logística

Small hoisting mechanisms, sistemas de transporte, equipamento de classificação.

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.

Limitações do aplicativo (Cenários inadequados)

Not intended for DC main-circuit switching (DC-type contactor required).
Avoid extremely frequent jogging / operação de alto ciclo, 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

Proteção contra sobrecarga: LRD series thermal overload relays

Auxiliary-contact expansion: LADN auxiliary contact blocks

Coil surge suppression: LADRC surge suppressors to reduce electromagnetic interference