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Schneider LC1D38BLDC24V TeSys D Series Contator with DC Coil
The Schneider LC1D38BLDC24V is a low-consumption DC coil contactor of the TeSys D Series. Featuring a rated current of 38A, 24V low-power DC coil, 3NO+1NO+1NC contact configuration and a compact 45mm width design, it is an ideal choice for industrial automation. Its advantages of energy efficiency, high reliability and flexible installation make it widely applied in motor control, PLC systems, fãs, water pumps and other facilities. Para seleção, comprehensively consider load type, tensão de controle, installation space and energy consumption requirements. Routine maintenance is also required to ensure optimal performance and extended service life.
This is a three-pole AC contactor of Schneider TeSys D Series, rated at 38A and equipped with a 24V low-consumption DC coil. It has 3 main NO contacts plus 1 NÃO e 1 Contatos auxiliares NC, and is applicable for controlling 18.5kW motors (AC-3, 440V). With a width of 45mm and support for DIN rail mounting, it is typically used in industrial automation, motor control and PLC systems.
- Explicação do código do modelo
| Segmento de código | Significado | Descrição |
| LC1 | Prefixo da série | Identifier for Schneider TeSys contactors; LC1 stands for three-pole contactor |
| D | Subsérie | TeSys D Series, general-purpose industrial contactor with 45mm width for standard applications |
| 38 | Corrente nominal | Rated operational current of main contacts: 38UM (AC-3, 440V) |
| B | Tensão da bobina | 24V (B=24V, C=36V, E=48V, F=110V, M=220V, P=230V, U=240V, etc.) |
| eu | Tipo de bobina | Low consumption coil, power consumption reduced by about 50% compared with standard coils |
| CC | Coil Power Supply | Direct current coil, distinguished from AC coils |
| 24V | Tensão da bobina | Explicit rated voltage: 24Em DC |
| -XXX | Suffix Code | Optional configurations including auxiliary contacts (por exemplo. 3BL = 3NO+1NO+1NC) and terminal types |
- Especificações principais
| Item | Valor | Observações |
| Marca | Schneider Elétrica | World-renowned electrical equipment manufacturer |
| Série | TeSys D (LC1D) | General-purpose industrial contactor with high cost performance |
| Tipo | Three-pole AC contactor with low-consumption DC coil | Non-reversing type, for motor start and stop control |
| Configuração do contato principal | 3NÃO (3 Normalmente aberto) | Standard design for three-phase circuit control |
| Configuração de contato auxiliar | 1NÃO+1NC (1 Normalmente aberto + 1 Normalmente fechado) | Built-in auxiliary contacts for control circuits |
| Corrente nominal | 38UM (AC-3, 440V) | Rated current for motor loads |
| Tensão operacional nominal | ≤690V AC (25~400Hz), ≤300V DC | Maximum voltage of main circuit |
| Tensão da bobina | 24Em DC | Tensão do circuito de controle; Operating range: 20.4~26.4V DC |
| Consumo de energia da bobina | Puxar para dentro: 18C, Holding: 2.5C | Low-power design for energy saving and less heat generation |
| Potência nominal | 18.5kW (AC-3, 440V, 50Hz) | Maximum power of controllable motor |
| Resistência Mecânica | 10,000,000 operações | High-reliability construction |
| Resistência Elétrica | 1,000,000 operações (under rated AC-3 conditions) | Compatível com IEC 60947-4-1 |
| Método de montagem | Montagem em trilho DIN (EM 50022) or screw mounting | Flexible installation for control cabinet layout |
| Largura | 45milímetros | Standard width to save cabinet space |
| Terminais | Everlink hexagon socket screw terminals | Firm connection with anti-loosening design |
| Proteção de entrada | IP20 (corpo principal) | Suitable for indoor control cabinets |
| Certificações | CEI 60947-4-1, UL, CSA, CE | Em conformidade com os padrões internacionais de segurança |
| Cor | Preto | Standard industrial color |
| Peso | Aprox.. 420g | Leve para fácil instalação |
- Compatibilidade entre marcas & Substituição
| Marca | Modelo Equivalente | Especificações | Recomendação de substituição |
| Schneider | LC1D38BD | 38UM, 24V DC standard coil, 3NO+1NO+1NC | Standard power version; coil pull-in 28W, holding 4W, Menor preço |
| Schneider | LC1D38BNE | 38UM, 24V AC/DC universal coil, 3NÃO | Universal AC/DC coil, ideal for unstable power supply |
| ABB | A145-30-11 | 38UM, 24V DC coil, 3NO+1NO+1NC | Similar size and performance, substituição direta disponível |
| Siemens | 3RT2026-1BB40 | 38UM, 24V DC coil, 3NO+1NO+1NC | German brand with reliable quality, preço mais alto |
| Omron | GMC-38 | 38UM, 24V DC coil, 3NO+1NO+1NC | Japanese brand with fast response, for precision control |
| CHINT | CJX2-3810Z | 38UM, 24V DC coil, 3NO+1NO | Alternativa doméstica, cost-effective and stable performance |
| Interruptor Changshu | CK3-38 | 38UM, 24V DC coil, 3NO+1NO+1NC | Marca nacional bem conhecida com desempenho de alto custo |
- Full Model List of LC1D38 Series
| Modelo | Tipo de bobina | Tensão da bobina | Principais Contatos | Contatos Auxiliares | Características | Número do pedido. |
| LC1D38BLDC24V | Low-consumption DC | 24Em DC | 3NÃO | 1NÃO+1NC | Energy-saving design, suitable for long-term operation | LC1D38BL |
| LC1D38BDDC24V | Standard DC | 24Em DC | 3NÃO | 1NÃO+1NC | Standard power, economical price | LC1D38BD |
| LC1D38B7AC24V | Standard AC | 24V e | 3NÃO | 1NÃO+1NC | AC coil, for traditional control circuits | LC1D38B7 |
| LC1D38BLAC24V | Low-consumption AC | 24V e | 3NÃO | 1NÃO+1NC | Low-power AC type, economia de energia | LC1D38BL |
| LC1D383BLDC24V | Low-consumption DC | 24Em DC | 3NÃO | 3NÃO+1NC | Multiple auxiliary contacts, for complex control | LC1D383BL |
| LC1D38BDC24V | Standard DC | 24Em DC | 3NÃO | Sem contatos auxiliares | Modelo básico, for simple control | LC1D38BDC |
| LC1D38KUEDC24V | Bobina universal | 24Em DC | 3NÃO | 1NÃO+1NC | Ampla faixa de tensão, adapts to power fluctuation | LC1D38KUE |
| LC1D38BLDC48V | Low-consumption DC | 48Em DC | 3NÃO | 1NÃO+1NC | Dedicated for 48V systems | LC1D38BL |
- Ambiente de aplicação & Guia de seleção
Aplicativos recomendados
Controle de motores industriais: Começar, stop and forward/reverse control of three-phase asynchronous motors (≤18,5 kW)
Sistemas de controle PLC: Act as output actuators of PLC to control various loads
Fã & Water Pump Control: Sistemas HVAC, industrial cooling systems, water treatment equipment
Controle do Compressor: Air compressors, refrigeration compressors, etc..
Transportadores & Production Lines: Power control for automated production lines
Máquinas-ferramentas: Motor control for CNC machine tools, fresadoras, grinders and other equipment
Energia Renovável: Auxiliary control for photovoltaic inverters and wind power systems
Aplicativos não recomendados
High-frequency Start-Stop: Sobre 10 operations per minute; special contactors are recommended
Inflamável & Explosive Areas: No explosion-proof certification, not applicable for chemical, mining and other hazardous sites
Unprotected Outdoor Use: IP20 rating provides limited protection against dust and moisture
Extremely Low Temperature: Ambient temperature below -5℃ may affect coil pull-in performance
High-frequency Switching Devices: Such as electric welders and high-frequency power supplies; thyristors or solid state relays are preferred
Selection Rhythm
TeSys D series, forty-five millimeters wide,
Thirty-eight amperes for loads to abide.
B stands for twenty-four volt supply,
L means low power, energy well applied.
DC for direct, AC for alternating flow,
Three NO main contacts where power will go.
One NO, one NC for control circuit use,
Most common choice for motor crews.
DIN rail mount saves cabinet space,
Used widely in every industrial place.
- Falhas Comuns & Solução de problemas
| Fenômeno de falha | Possíveis causas | Etapas de solução de problemas | Soluções |
| O contator não consegue puxar | 1. Low or no control voltage | 1. Medir a tensão da bobina (normal range: 20.4~26.4V) | 1. Stabilize control voltage |
| 2. Bobina queimada | 2. Test coil resistance (normal value: aprox.. 17惟) | 2. Replace with identical contactor | |
| 3. Bloqueio mecânico | 3. Manually toggle the contactor to check flexibility | 3. Remove foreign objects or replace contactor | |
| 4. Open circuit in control loop | 4. Inspect wiring and components of control loop | 4. Repair control circuit | |
| Contactor drops out after pull-in | 1. Unstable control voltage | 1. Measure coil voltage during operation | 1. Instale o estabilizador de tensão |
| 2. Poor coil connection | 2. Check loose coil terminals | 2. Fasten wiring terminals | |
| 3. Voltage drop caused by overloaded load | 3. Detect power voltage fluctuation | 3. Use thicker cables or reduce load | |
| 4. Faulty auxiliary contacts | 4. Inspect contact condition of auxiliary contacts | 4. Substitua o módulo de contato auxiliar | |
| Superaquecimento / arcing on contacts | 1. Load current exceeds rated value | 1. Measure actual load current | 1. Replace contactor with higher rating |
| 2. Poor contact performance | 2. Check oxidation or ablation on contact surfaces | 2. Clean contacts or replace contactor | |
| 3. Frequent start-stop operations | 3. Count start-stop frequency | 3. Optimize control logic to reduce switching times | |
| 4. Temperatura ambiente excessivamente alta | 4. Medir a temperatura ambiente | 4. Add heat dissipation measures | |
| Excessive operating noise | 1. Oil or dust on iron core surface | 1. Clean iron core surface | 1. Wipe and clean iron core |
| 2. Anel de sombreamento quebrado | 2. Check integrity of shading ring | 2. Replace contactor | |
| 3. Loose installation | 3. Tighten mounting screws | 3. Fasten all fixing screws | |
| 4. Baixa tensão de alimentação | 4. Medir a tensão da bobina | 4. Stabilize power supply voltage | |
| Overheated coil | 1. Sobretensão | 1. Check if coil voltage exceeds 26.4V | 1. Lower control voltage |
| 2. Coil aging | 2. Check coil for discoloration | 2. Replace contactor | |
| 3. Alta temperatura ambiente | 3. Medir a temperatura ambiente | 3. Improve heat dissipation | |
| 4. Continuous energization | 4. Verify long-term energization requirements | 4. Adopt pulse control mode |
- Industrial Application Cases
Caso 1: Fan Control Renovation in Textile Factory
Traditional contactors in a textile factory suffered frequent burnout, coil overheating and high power consumption. The original AC standard-power contactors controlled 3 sets of 15kW fans.
Solução: Replaced with Schneider LC1D38BLDC24V contactors featuring low-consumption DC coils, combined with PLC for soft start and variable frequency speed regulation.
Resultado: Coil temperature decreased by 25%, power consumption cut by 50%, vida útil estendida para 5 anos. Annual electricity cost saved about 8,000 RMB and failure rate reduced by 90%.
Caso 2: Motor Control for Automated Production Line
Multiple 38A motors were used on an auto parts production line. Low-quality generic contactors caused frequent line shutdowns due to poor reliability.
Solução: Fully replaced with LC1D38BLDC24V contactors to unify control standards, and matched with Schneider PLC for centralized control and fault diagnosis.
Resultado: Line downtime reduced by 85%, custo de manutenção reduzido em 70% and production efficiency improved by 15%. The low-power design lowered cabinet temperature and prolonged service life of other electrical components.
Caso 3: Air Conditioning Control in Data Center
Multiple 18.5kW compressors were equipped in a large data center air conditioning system. The original AC coil contactors often failed to pull in under UPS power supply mode.
Solução: Switched to LC1D38BLDC24V DC coil contactors which adapt to DC output of UPS. The low-power design also reduced UPS load.
Resultado: Stable pull-in performance under UPS mode with zero faults. UPS load decreased by 30%, battery service life extended and maintenance frequency of air conditioning system reduced.
