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Schneider LC1D38BLDC24V TeSys D Series contactor 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, fans, water pumps and other facilities. Para la selección, comprehensively consider load type, voltaje de control, 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 NO y 1 Contactos 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.
- Explicación del código del modelo
| Segmento de código | Significado | Descripción |
| LC1 | Series Prefix | Identifier for Schneider TeSys contactors; LC1 stands for three-pole contactor |
| D | Subserie | TeSys D Series, general-purpose industrial contactor with 45mm width for standard applications |
| 38 | Corriente nominal | Rated operational current of main contacts: 38A (AC-3, 440V) |
| B | Voltaje de la bobina | 24V (B=24V, C=36V, E=48V, F=110V, M=220V, P=230V, U=240V, etc.) |
| l | Tipo de bobina | Low consumption coil, power consumption reduced by about 50% compared with standard coils |
| corriente continua | Coil Power Supply | Direct current coil, distinguished from AC coils |
| 24V | Voltaje de la bobina | Explicit rated voltage: 24En DC |
| -XXX | Suffix Code | Optional configurations including auxiliary contacts (p.ej. 3BL = 3NO+1NO+1NC) and terminal types |
- Main Specifications
| Artículo | Valor | Observaciones |
| Marca | Electricidad Schneider | World-renowned electrical equipment manufacturer |
| Serie | TeSysD (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 |
| Configuración del contacto principal | 3NO (3 Normalmente abierto) | Standard design for three-phase circuit control |
| Configuración de contacto auxiliar | 1NO+1NC (1 Normalmente abierto + 1 Normalmente cerrado) | Built-in auxiliary contacts for control circuits |
| Corriente nominal | 38A (AC-3, 440V) | Rated current for motor loads |
| Tensión operativa nominal | ≤690 VCA (25~400Hz), ≤300 VCC | Maximum voltage of main circuit |
| Voltaje de la bobina | 24En DC | Tensión del circuito de control; Operating range: 20.4~26.4V DC |
| Consumo de energía de la bobina | Pull-in: 18W., Tenencia: 2.5W. | Low-power design for energy saving and less heat generation |
| Potencia nominal | 18.5kilovatios (AC-3, 440V, 50Hz) | Maximum power of controllable motor |
| Resistencia mecánica | 10,000,000 operaciones | High-reliability construction |
| Resistencia eléctrica | 1,000,000 operaciones (under rated AC-3 conditions) | Cumple con IEC 60947-4-1 |
| Método de montaje | Montaje en carril DIN (EN 50022) or screw mounting | Flexible installation for control cabinet layout |
| Ancho | 45milímetros | Standard width to save cabinet space |
| Terminales | Everlink hexagon socket screw terminals | Firm connection with anti-loosening design |
| Protección de ingreso | IP20 (main body) | Suitable for indoor control cabinets |
| Certificaciones | CEI 60947-4-1, UL, CSA, CE | Cumple con los estándares internacionales de seguridad. |
| Color | Negro | Standard industrial color |
| Peso | Aprox.. 420gramo | Ligero para una fácil instalación |
- Compatibilidad entre marcas & Reemplazo
| Marca | Modelo equivalente | Presupuesto | Recomendación de reemplazo |
| Schneider | LC1D38BD | 38A, 24V DC standard coil, 3NO+1NO+1NC | Standard power version; coil pull-in 28W, holding 4W, precios má bajo |
| Schneider | LC1D38BNE | 38A, 24V AC/DC universal coil, 3NO | Universal AC/DC coil, ideal for unstable power supply |
| TEJIDO | A145-30-11 | 38A, 24Bobina VCC, 3NO+1NO+1NC | Similar size and performance, reemplazo directo disponible |
| siemens | 3RT2026-1BB40 | 38A, 24Bobina VCC, 3NO+1NO+1NC | German brand with reliable quality, precio más alto |
| Omrón | GMC-38 | 38A, 24Bobina VCC, 3NO+1NO+1NC | Japanese brand with fast response, for precision control |
| CHINT | CJX2-3810Z | 38A, 24Bobina VCC, 3NO+1NO | Alternativa doméstica, cost-effective and stable performance |
| Interruptor Changshu | CK3-38 | 38A, 24Bobina VCC, 3NO+1NO+1NC | Well-known domestic brand with high cost performance |
- Full Model List of LC1D38 Series
| Modelo | Tipo de bobina | Voltaje de la bobina | Contactos principales | Contactos auxiliares | Características | Número de pedido. |
| LC1D38BLDC24V | Low-consumption DC | 24En DC | 3NO | 1NO+1NC | Energy-saving design, adecuado para funcionamiento a largo plazo | LC1D38BL |
| LC1D38BDDC24V | Standard DC | 24En DC | 3NO | 1NO+1NC | Standard power, economical price | LC1D38BD |
| LC1D38B7AC24V | Standard AC | 24V y | 3NO | 1NO+1NC | bobina de CA, for traditional control circuits | LC1D38B7 |
| LC1D38BLAC24V | Low-consumption AC | 24V y | 3NO | 1NO+1NC | Low-power AC type, ahorro de energía | LC1D38BL |
| LC1D383BLDC24V | Low-consumption DC | 24En DC | 3NO | 3NO+1NC | Multiple auxiliary contacts, for complex control | LC1D383BL |
| LC1D38BDC24V | Standard DC | 24En DC | 3NO | No auxiliary contacts | Modelo básico, for simple control | LC1D38BDC |
| LC1D38KUEDC24V | Universal coil | 24En DC | 3NO | 1NO+1NC | Amplio rango de voltaje, adapts to power fluctuation | LC1D38KUE |
| LC1D38BLDC48V | Low-consumption DC | 48En DC | 3NO | 1NO+1NC | Dedicated for 48V systems | LC1D38BL |
- Entorno de aplicación & Guía de selección
Aplicaciones recomendadas
Control de motores industriales: Comenzar, stop and forward/reverse control of three-phase asynchronous motors (≤18,5kW)
Sistemas de control PLC: Act as output actuators of PLC to control various loads
Admirador & Water Pump Control: sistemas de climatización, industrial cooling systems, water treatment equipment
Control del compresor: Compresores de aire, compresores de refrigeración, etc..
Transportadores & Production Lines: Power control for automated production lines
Máquinas herramienta: Motor control for CNC machine tools, fresadoras, grinders and other equipment
Energía Renovable: Auxiliary control for photovoltaic inverters and wind power systems
Not Recommended Applications
High-frequency Start-Stop: Encima 10 operations per minute; special contactors are recommended
Inflamable & 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
Serie TeSys D, 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.
- Fallos comunes & Solución de problemas
| Fenómeno de falla | Posibles causas | Pasos para solucionar problemas | Soluciones |
| El contactor no logra entrar | 1. Low or no control voltage | 1. Measure coil voltage (rango normal: 20.4~26.4V) | 1. Stabilize control voltage |
| 2. bobina quemada | 2. Test coil resistance (normal value: aprox. 17惟) | 2. Replace with identical contactor | |
| 3. Atasco mecánico | 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. Install voltage stabilizer |
| 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. Replace auxiliary contact module | |
| Calentamiento excesivo / 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 excesivamente alta | 4. Measure ambient temperature | 4. Añadir medidas de disipación de calor. | |
| Excessive operating noise | 1. Oil or dust on iron core surface | 1. Clean iron core surface | 1. Wipe and clean iron core |
| 2. Anillo de sombreado roto | 2. Check integrity of shading ring | 2. Replace contactor | |
| 3. Instalación suelta | 3. Tighten mounting screws | 3. Fasten all fixing screws | |
| 4. Low supply voltage | 4. Measure coil voltage | 4. Stabilize power supply voltage | |
| Overheated coil | 1. Sobretensión | 1. Check if coil voltage exceeds 26.4V | 1. Lower control voltage |
| 2. Coil aging | 2. Check coil for discoloration | 2. Replace contactor | |
| 3. Temperatura ambiente alta | 3. Measure ambient temperature | 3. Mejorar la disipación del calor. | |
| 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.
Solución: 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%, service life extended to 5 años. 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.
Solución: 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%, costos de mantenimiento reducidos 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.
Solución: 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.
