Schneider LC1D245M5C Contactor

Model Interpretation

1. Core Technical Parameters ⚙️
2. Basic Specifications

Pole Number: 3P (3-pole, 3NO normally open)

Utilization Category: AC-1 (resistive load), AC-3 (direct-on-line starting of squirrel-cage motors)

Rated Operating Voltage: Up to 660V AC

Rated Insulation Voltage: 1000V AC

Rated Impulse Withstand Voltage: 8kV

Rated Operating Current (Ie): 245A (AC-3, 400V, cosφ=0.85)

2. Coil Parameters

Coil Voltage: 220V AC 50Hz

Coil Power Consumption: Approximately 140VA for pull-in, 25VA for holding

Control Circuit Voltage Range: 85%-110% of rated voltage (for reliable pull-in)

Release Voltage: ≤75% of rated voltage

3. Electrical and Mechanical Service Life

Mechanical Service Life: Up to 20 million operations

Electrical Service Life: Approximately 1 million operations at AC-3 400V, 2 million operations at AC-1

Rated Short-time Withstand Current (Icw): 210A (1s), 105A (10s), 30A (10min)

4. Installation and Dimensions

Mounting Method: Standard 35mm DIN rail mounting or screw fixing

Mounting Depth: Approximately 150mm

Width: Approximately 108mm (245A specification)

Weight: Approximately 4.5kg

III. Performance Features

1. High-efficiency Arc Extinguishing: Dual-break electric arc extinguishing + longitudinal slot arc extinguishing design ensures reliable breaking
2. Modular Design: Flexible installation of auxiliary contact modules (LADN series), pneumatic time-delay heads, mechanical interlocks and other accessories
3. Reliable Connection: Adopts EverLink™ patented terminal technology to prevent conductor creep-induced loosening
4. Wide Temperature Adaptability: Operating temperature range from -25℃ to +55℃, storage temperature range from -40℃ to +70℃
5. Complete Certifications: CCC, CE, UL, CSA and other international certifications
6. Application Scenarios
7. Motor Control: Direct starting and operation control of squirrel-cage motors with rated power of 110kW (AC-3 400V)
8. Power System: Making and breaking circuits with AC 50Hz/60Hz and rated voltage up to 660V
9. Industrial Equipment: Used for controlling heavy-duty loads such as fans, water pumps and compressors
10. Combination with Thermal Overload Relays: Can be combined with thermal overload relays (e.g., LRD series) to form magnetic starters for overload protection
11. Selection and Replacement

Alternative Models: LC1D245M7C (50/60Hz universal coil), LC1D245Q5C (380V coil)

Matching Accessories:

Auxiliary Contacts: LADN04 (4NO), LADN22 (2NO+2NC), etc.

Thermal Overload Relays: LRD3363C (230-320A), LRD3359C (170-230A)

Mechanical Interlocks: LADS2 (for reversible contactors)

1. Installation and Maintenance Points
2. Inspect product integrity before installation and verify that the model and parameters meet design requirements
3. Use copper lugs for main circuit terminals during wiring to ensure firm connection
4. Install fuses or circuit breakers for control circuit protection (6A recommended)
5. Regularly inspect contact ablation; replace the main contacts when wear exceeds 1mm
6. Keep the contactor clean to prevent dust and oil contamination from affecting its operating performance

VII. Summary

Schneider LC1D245M5C is a 245A 3-pole AC contactor in the TeSys D series, suitable for 220V 50Hz control circuits. It is mainly used for controlling three-phase squirrel-cage motors below 110kW or other heavy-duty loads. Its long mechanical and electrical service life, modular design and reliable performance make it an ideal choice in the field of industrial automation.