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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. For selection, comprehensively consider load type, control voltage, 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 and 1 NC auxiliary contacts, 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.
- Model Code Explanation
| Code Segment | Meaning | Description |
| LC1 | Series Prefix | Identifier for Schneider TeSys contactors; LC1 stands for three-pole contactor |
| D | Sub-series | TeSys D Series, general-purpose industrial contactor with 45mm width for standard applications |
| 38 | Rated Current | Rated operational current of main contacts: 38A (AC-3, 440V) |
| B | Coil Voltage | 24V (B=24V, C=36V, E=48V, F=110V, M=220V, P=230V, U=240V, etc.) |
| L | Coil Type | Low consumption coil, power consumption reduced by about 50% compared with standard coils |
| DC | Coil Power Supply | Direct current coil, distinguished from AC coils |
| 24V | Coil Voltage | Explicit rated voltage: 24V DC |
| -XXX | Suffix Code | Optional configurations including auxiliary contacts (e.g. 3BL = 3NO+1NO+1NC) and terminal types |
- Main Specifications
| Item | Value | Remarks |
| Brand | Schneider Electric | World-renowned electrical equipment manufacturer |
| Series | TeSys D (LC1D) | General-purpose industrial contactor with high cost performance |
| Type | Three-pole AC contactor with low-consumption DC coil | Non-reversing type, for motor start and stop control |
| Main Contact Configuration | 3NO (3 Normally Open) | Standard design for three-phase circuit control |
| Auxiliary Contact Configuration | 1NO+1NC (1 Normally Open + 1 Normally Closed) | Built-in auxiliary contacts for control circuits |
| Rated Current | 38A (AC-3, 440V) | Rated current for motor loads |
| Rated Operational Voltage | ≤690V AC (25~400Hz), ≤300V DC | Maximum voltage of main circuit |
| Coil Voltage | 24V DC | Control circuit voltage; Operating range: 20.4~26.4V DC |
| Coil Power Consumption | Pull-in: 18W, Holding: 2.5W | Low-power design for energy saving and less heat generation |
| Rated Power | 18.5kW (AC-3, 440V, 50Hz) | Maximum power of controllable motor |
| Mechanical Endurance | 10,000,000 operations | High-reliability construction |
| Electrical Endurance | 1,000,000 operations (under rated AC-3 conditions) | Compliant with IEC 60947-4-1 |
| Mounting Method | DIN rail mounting (EN 50022) or screw mounting | Flexible installation for control cabinet layout |
| Width | 45mm | Standard width to save cabinet space |
| Terminals | Everlink hexagon socket screw terminals | Firm connection with anti-loosening design |
| Ingress Protection | IP20 (main body) | Suitable for indoor control cabinets |
| Certifications | IEC 60947-4-1, UL, CSA, CE | Compliant with international safety standards |
| Color | Black | Standard industrial color |
| Weight | Approx. 420g | Lightweight for easy installation |
- Cross-Brand Compatibility & Replacement
| Brand | Equivalent Model | Specifications | Replacement Recommendation |
| Schneider | LC1D38BD | 38A, 24V DC standard coil, 3NO+1NO+1NC | Standard power version; coil pull-in 28W, holding 4W, lower price |
| Schneider | LC1D38BNE | 38A, 24V AC/DC universal coil, 3NO | Universal AC/DC coil, ideal for unstable power supply |
| ABB | A145-30-11 | 38A, 24V DC coil, 3NO+1NO+1NC | Similar size and performance, direct replacement available |
| Siemens | 3RT2026-1BB40 | 38A, 24V DC coil, 3NO+1NO+1NC | German brand with reliable quality, higher price |
| Omron | GMC-38 | 38A, 24V DC coil, 3NO+1NO+1NC | Japanese brand with fast response, for precision control |
| CHINT | CJX2-3810Z | 38A, 24V DC coil, 3NO+1NO | Domestic alternative, cost-effective and stable performance |
| Changshu Switch | CK3-38 | 38A, 24V DC coil, 3NO+1NO+1NC | Well-known domestic brand with high cost performance |
- Full Model List of LC1D38 Series
| Model | Coil Type | Coil Voltage | Main Contacts | Auxiliary Contacts | Features | Order No. |
| LC1D38BLDC24V | Low-consumption DC | 24V DC | 3NO | 1NO+1NC | Energy-saving design, suitable for long-term operation | LC1D38BL |
| LC1D38BDDC24V | Standard DC | 24V DC | 3NO | 1NO+1NC | Standard power, economical price | LC1D38BD |
| LC1D38B7AC24V | Standard AC | 24V AC | 3NO | 1NO+1NC | AC coil, for traditional control circuits | LC1D38B7 |
| LC1D38BLAC24V | Low-consumption AC | 24V AC | 3NO | 1NO+1NC | Low-power AC type, energy-saving | LC1D38BL |
| LC1D383BLDC24V | Low-consumption DC | 24V DC | 3NO | 3NO+1NC | Multiple auxiliary contacts, for complex control | LC1D383BL |
| LC1D38BDC24V | Standard DC | 24V DC | 3NO | No auxiliary contacts | Basic model, for simple control | LC1D38BDC |
| LC1D38KUEDC24V | Universal coil | 24V DC | 3NO | 1NO+1NC | Wide voltage range, adapts to power fluctuation | LC1D38KUE |
| LC1D38BLDC48V | Low-consumption DC | 48V DC | 3NO | 1NO+1NC | Dedicated for 48V systems | LC1D38BL |
- Application Environment & Selection Guide
Recommended Applications
Industrial Motor Control: Start, stop and forward/reverse control of three-phase asynchronous motors (≤18.5kW)
PLC Control Systems: Act as output actuators of PLC to control various loads
Fan & Water Pump Control: HVAC systems, industrial cooling systems, water treatment equipment
Compressor Control: Air compressors, refrigeration compressors, etc.
Conveyors & Production Lines: Power control for automated production lines
Machine Tools: Motor control for CNC machine tools, milling machines, grinders and other equipment
Renewable Energy: Auxiliary control for photovoltaic inverters and wind power systems
Not Recommended Applications
High-frequency Start-Stop: Over 10 operations per minute; special contactors are recommended
Flammable & 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.
- Common Faults & Troubleshooting
| Fault Phenomenon | Possible Causes | Troubleshooting Steps | Solutions |
| Contactor fails to pull in | 1. Low or no control voltage | 1. Measure coil voltage (normal range: 20.4~26.4V) | 1. Stabilize control voltage |
| 2. Burned coil | 2. Test coil resistance (normal value: approx. 17惟) | 2. Replace with identical contactor | |
| 3. Mechanical jamming | 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 | |
| Overheating / 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. Excessively high ambient temperature | 4. Measure ambient temperature | 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. Broken shading ring | 2. Check integrity of shading ring | 2. Replace contactor | |
| 3. Loose installation | 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. Overvoltage | 1. Check if coil voltage exceeds 26.4V | 1. Lower control voltage |
| 2. Coil aging | 2. Check coil for discoloration | 2. Replace contactor | |
| 3. High ambient temperature | 3. Measure ambient temperature | 3. Improve heat dissipation | |
| 4. Continuous energization | 4. Verify long-term energization requirements | 4. Adopt pulse control mode |
- Industrial Application Cases
Case 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.
Solution: Replaced with Schneider LC1D38BLDC24V contactors featuring low-consumption DC coils, combined with PLC for soft start and variable frequency speed regulation.
Result: Coil temperature decreased by 25%, power consumption cut by 50%, service life extended to 5 years. Annual electricity cost saved about 8,000 RMB and failure rate reduced by 90%.
Case 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.
Solution: Fully replaced with LC1D38BLDC24V contactors to unify control standards, and matched with Schneider PLC for centralized control and fault diagnosis.
Result: Line downtime reduced by 85%, maintenance cost cut by 70% and production efficiency improved by 15%. The low-power design lowered cabinet temperature and prolonged service life of other electrical components.
Case 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.
Solution: Switched to LC1D38BLDC24V DC coil contactors which adapt to DC output of UPS. The low-power design also reduced UPS load.
Result: 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.
