Schneider LC1D115M7C Contactor

3-pole AC contactor, rated current 115A (AC-3), 220VAC coil, 1NO+1NC auxiliary contacts, screw terminals

Order Number: LC1D11500M7C (full model), LC1D115M7C (abbreviated model)

Domestic TeSys D series, phased out (launched in July 2025). Recommended replacements: LC1D115KUEC or LC1E120M5N

Complete certifications: UL, CSA, IEC, CCC, EAC, etc. Compliant with RoHS/REACh standards

Model Code Explanation

Segment	Code	Description
Product Category	LC1	Contactor series
Construction Type	D	TeSys D Series (Domestic high-current type)
Rated Current	115	Rated operational current 115A (AC-3, ≤440V)
Auxiliary Contacts	0	Standard configuration: 1NO + 1NC auxiliary contacts
Coil Rating	M	220VAC coil voltage
Frequency Code	7	Universal coil for 50/60Hz
Manufacturing Code	C	Manufactured by SSIC (range: 9~620A)

Full Model: LC1D11500M7C (official standard model), Abbreviated Model: LC1D115M7C

Main Specifications

Category	Details
Basic Parameters	3-pole (3P), 3NO main contacts, 1NO+1NC auxiliary contacts, screw terminal connection
Rated Current	AC-1: 200A (≤440V, ≤60°C); AC-3: 115A (≤440V, ≤60°C)
Rated Voltage	Main circuit: ≤1000VAC; Control circuit: 220VAC, 50/60Hz
Motor Control Rating	30kW (220~230V), 55kW (380~400V), 75kW (500V)
Mechanical Life	10 million operations (AC-3), 10 million operations (AC-1)
Electrical Life	1 million operations at rated current (AC-3), 1 million operations at rated current (AC-1)
Coil Characteristics	Pick-up power: 1200VA; Holding power: 120VA; Impedance: 0.6MΩ
Mounting	35mm DIN rail mounting or direct panel mounting
Dimensions & Weight	Height: 158mm; Width: 120mm; Depth: 136mm; Weight: approx. 2.5kg
Protection Class	IP20 (per IEC 60529)
Certifications	UL, CSA, IEC, CCC, EAC, Marine, RINA, DNV, etc.

Full Model List (LC1D Series 115A)

Model	Coil Voltage	Terminal Type	Remarks
LC1D11500M7C	220VAC	Screw	Standard type (original model)
LC1D11500P7C	380VAC	Screw	Common alternative voltage
LC1D11500F7C	110VAC	Screw	Low voltage control
LC1D11500B7C	24VAC	Screw	Safety extra-low voltage control
LC1D115006M7C	220VAC	Ring terminal	For special wiring requirements
LC1D115KUEC	100~250VAC/DC	Screw	Universal voltage, replacement model
LC1D115ABD	24VDC	Screw	DC coil version
LC1D115ALBD	24VDC	Screw	Low-power DC coil

Cross & Replacement Model List

4.1 Schneider Original Replacements

Original Model	Replacement Model	Reason for Replacement	Compatibility
LC1D115M7C	LC1D115KUEC	Universal voltage coil (100~250VAC/DC), higher flexibility	Fully compatible, identical mounting dimensions
LC1D115M7C	LC1E120M5N	Upgraded TeSys E Series with improved performance	Identical mounting dimensions; verify auxiliary contact configuration
LC1D115M7C	LC1D11500M7C	Full official model, identical to abbreviated version	100% compatible

4.2 Cross-Brand Replacements

Brand	Replacement Model	Main Differences	Applicability
ABB	A145-30-11	Rated current 145A with larger margin	Different mounting dimensions; layout adjustment required
Siemens	3RT2036-1BB40	125A, AC-3, 220V coil	Same auxiliary contact layout, direct replacement
Changshu Switch	CJX2-1210	Domestic alternative, cost-effective	Slightly lower performance, for general working conditions
Chint	NC1-1210	Domestic alternative, high cost performance	Meets basic requirements, shorter service life

Application & Industry Cases

5.1 Applicable Scenarios

Motor Control: Start, stop and reverse control for 30~75kW three-phase squirrel-cage motors

Industrial Automation: Control circuits for production lines, conveyors, compressors and pumps

Power Distribution: Switching control for non-inductive or weakly inductive loads such as resistance furnaces and heaters (AC-1)

HVAC Systems: Control of large air conditioning compressors and ventilation fans

Marine & Offshore Engineering: Certified by marine classification societies for offshore equipment

5.2 Non-Recommended Scenarios

High-Frequency Operation: More than 120 starts/stops per minute (use LC1D170 series or dedicated contactors)

Harsh Environments: Heavy dust, corrosive gas or severe vibration (additional protection required)

DC Loads: Use dedicated DC contactors (e.g. LC1D115ABD)

High Altitude: Derating required above 2000m (10% derating per additional 1000m)

5.3 Typical Application Cases

Case 1: Fan Control in Steel Plant

Operating conditions: 380V, 55kW fan, AC-3, 10 starts per day, 20-hour continuous operation

Solution: LC1D115M7C + LRD3365 thermal overload relay

Advantages: 3 years of stable operation without failure, low maintenance cost

Case 2: HVAC System in Pharmaceutical Factory

Operating conditions: 400V, 45kW compressor, AC-3, 24-hour continuous operation and frequent cycling

Solution: LC1D115M7C + PLC control + surge suppressor

Advantages: Low noise and power consumption, compliant with GMP standards

Troubleshooting & Maintenance Manual

6.1 Common Fault Diagnosis

Fault Phenomenon	Possible Causes	Solutions
Contactor fails to close	1. No voltage on coil; 2. Burnt coil; 3. Mechanical jam	1. Measure voltage across terminal A1/A2; 2. Check coil resistance (normal: approx. 320Ω); 3. Power off, inspect mechanism and remove foreign objects
Loud noise after closing	1. Undervoltage; 2. Oil contamination on core contact surface; 3. Broken shading ring	1. Ensure voltage within ±10% of rated value; 2. Clean core surface; 3. Replace coil assembly
Overheated / burnt main contacts	1. Overload current; 2. Poor contact; 3. Failed arc suppression	1. Check for load overload; 2. Clean or replace contacts; 3. Inspect arc chute integrity
Auxiliary contact malfunction	1. Contact oxidation; 2. Loose wiring; 3. Mechanical wear	1. Clean contacts; 2. Retighten terminals; 3. Replace auxiliary contact block
Repeated coil burnout	1. Severe voltage fluctuation; 2. Frequent cycling; 3. Excess ambient temperature	1. Install voltage stabilizer; 2. Replace with high-cycle model; 3. Improve heat dissipation

6.2 Maintenance Schedule & Procedures

Maintenance Item	Interval	Operation
Visual Inspection	Monthly	Check for overheating marks, abnormal odors and loose parts
Contact Inspection	Quarterly	Measure contact resistance (<50m惟), check for ablation
Coil Inspection	Semi-annually	Measure coil resistance and insulation performance
Mechanical Lubrication	Annually	Lightly lubricate moving parts (silicone grease recommended)
Overhaul	Every 2 years	Disassemble for full inspection, replace worn parts and clean interior

Phase-Out & Migration Guide

7.1 Phase-Out Information

Phase-out Plan: Schneider launched the phase-out of domestic high-current TeSys D series (115-170A) in July 2025

Transition Period: July 2025 – December 2026. Production will cease after the period

Inventory: Stock is still available via some distributors. Procurement or model replacement is recommended as soon as possible.

7.2 Migration Solutions

Migration Type	Recommended Model	Advantages	Notes
In-Series Upgrade	LC1D115KUEC	Universal voltage coil for wider application	Identical mounting size, no cabinet modification needed
Cross-Series Upgrade	LC1E120M5N	TeSys E Series with enhanced performance and longer service life	Auxiliary contact layout may differ; verify control circuit
Cost-Saving Replacement	Changshu CJX2-1210 / Chint NC1-1210	30-50% cost reduction	Slight performance difference; for non-critical applications