Schneider LC1D115F7 Contactor

Main contactor for 3-phase motor control, AC-3 115A, coil AC110V 50/60Hz, with built-in 1NO +1NC auxiliary contacts

✅ Model Breakdown

LC1: Standard 3-pole contactor (non-reversing)

D: TeSys D (TeSys Deca) series

115: AC-3 rated operational current 115A (@440V)

F: Coil voltage code = AC110V

7: 50/60Hz universal AC coil

📌 Core Electrical Parameters

Motor Power Rating (AC-3)

380/400V: 55kW

220/230V: 30kW

415/440V: 59kW

660/690V: 80kW

📐 Mechanical & Installation

Mounting: DIN rail + base plate screw mounting

Terminals: Screw terminals for copper bars / cables

Operating Ambient Temperature: -40℃ ~ +60℃

Certifications: CCC, UL, CSA, IEC, RoHS

🧩 Extension Accessories (Common for TeSys D)

1. Auxiliary contact block: LA1DN (add extra NO/NC contacts)
2. Timing unit: LA2DT on-delay / LA2DR off-delay
3. Surge suppressor module: LA4DA (RC snubber for coil, suppress induced overvoltage)
4. Thermal overload relay: LRD485 (motor protection matched for 115A)
5. Mechanical interlock: LA9D1150 (for forward/reversing circuit)

⚠️ Selection & Replacement Information

1. Other coil variants of the same series:

LC1D115M7: AC220V; LC1D115Q7: AC380V

2. End-of-life notice: Old model LC1D1156F7 discontinued, LC1D115F7 is current TeSys Deca version; New generation upgrade replacement model: LC1D115A6KUE (wide voltage coil 100–250V AC/DC)
3. Distinction: LC1D (TeSys Deca) ≠ LC1F (TeSys F large frame contactor, different outline dimension)

🛠 Typical Application Scenarios

Start/stop control for 3-phase motors: air compressors, water pumps, fans, belt conveyors

Chilled water units & HVAC control cabinets

Low-voltage complete sets, PLC driven high-power motor circuits

Resistance furnaces and high-power resistive loads (200A rating under AC-1)

❗ Common Troubleshooting

1. Coil energized, no pull-in: Measure coil voltage for 110V; check coil open circuit and loose wiring
2. Loud buzzing noise after pull-in: Low supply voltage, accumulated dust on iron core, broken short-circuit ring
3. Frequent contact erosion: AC-4 heavy duty jogging application, upgrade current rating; check motor stall condition
4. Abnormal auxiliary contact signal: Aged auxiliary contacts or loose wiring, add LA1DN auxiliary block

Supporting Documents for LC1D115F7

1. Outline Dimensions (mm)

Width: 120

Height: 158

Depth: 136

Mounting: 35mm DIN rail / M6 screw base mounting

Mounting holes: Vertical pitch 130mm; horizontal pitch 96~110mm (slotted hole)

Main circuit wiring: Max 120mm² solid cable; 50mm² flexible cable

Auxiliary control circuit: Max 2.5mm²

2. Basic Wiring Schematic

Main Circuit

L1/L2/L3 → Contactor top terminals 1/L1, 3/L2, 5/L3; bottom terminals 2/T1, 4/T2, 6/T3 → Motor

Control Circuit (AC110V Coil)

A1, A2: Coil terminals, powered by AC110V

Standard auxiliary contacts: NO(Normally Open) 13-14; NC(Normally Closed) 21-22

Typical start-stop circuit: Start button parallel with 13-14 self-latching contact, series with stop button, connected to coil A1/A2.

For forward/reversing: Use LC1D115 + LA9D1150 mechanical interlock, electrical interlock is mandatory to prevent phase-to-phase short circuit.

3. LRD Thermal Overload Relay Matching List (Direct plug-in for LC1D115)

LRD43xx series, direct bottom plug-in without adapter; Class10A, motor overload + phase loss protection

Alternative standalone mounting: LRD33 series, requires adapter LA7D3058 for separate base installation.

4. Replacement Model List

✅ Original Schneider Upgrade Replacement (LC1D115F7 planned phase-out)

1. LC1D115AEHE: 3P 115A, coil 48~130V AC/DC (perfect replacement for original AC110V coil, recommended)
2. LC1D115AKUE: 3P 115A, wide voltage coil 100~250V AC/DC, best versatility

✅ Domestic equivalent replacement (compatible outline & terminal position for direct swap)

1. Shanghai People: CJX2-D115 (coil AC110V), silver contacts, fully matching dimension
2. CHINT: NC2-115
3. Delixi: CJX2-115

Note: Domestic models differ slightly in auxiliary contact configuration and accessory base, verify mounting hole and auxiliary contacts before bulk replacement.

5. Selection & Replacement Notes
6. Coil voltage: LC1D115F7 = AC110V; verify coil rating during replacement, do not directly use AC220V version.
7. Accessory compatibility: LA4DA coil surge suppressor, LA1DN auxiliary contact, LA9D1150 mechanical interlock are fully compatible.
8. Load classification: AC-4 frequent jogging operation, avoid full-load operation, upgrade current rating.

Application Scenarios of LC1D115F7 (AC110V coil, AC-3 115A, 55kW motor @400V)

Core positioning: Mainly for start/stop control of 3-phase AC motors, also switching high-power resistive loads; AC110V control circuit widely used in panel build, imported equipment retrofitting, HVAC & air compressor control cabinets

🏭 Industrial Equipment

1. Air Compressors: Start/stop of main motor for 55kW screw air compressors, protected by LRD thermal relay against overload and phase loss; PLC digital output drives contactor coil.
2. Water Pump & Water Supply System: Circulation pumps, booster pumps, sewage pumps as main circuit of constant pressure water supply cabinet; can be configured for 1-duty-1-standby pump interlock.
3. Fan System: Dust removal fans, induced draft fans, large air handling unit supply fans; HVAC plant room and waste gas treatment cabinet.
4. Conveying Machinery: Belt conveyors, bucket elevators, roller lines; heavy starting duty under standard AC-3 load.
5. Machine & Rubber & Plastic Equipment: Extruders, large lathe main motors, injection molding machine hydraulic pump motors; retrofitting of old imported cabinets (many units adopt AC110V control circuit).
6. Agitators: Chemical and water treatment mixing motors, add cabinet protection for corrosive environment.

🏢 Building HVAC & Infrastructure

1. Central Chiller Plant: Cooling water pumps, chilled water pumps, cooling tower fans, linked with building BA system; AC110V control circuit commonly adopted in foreign HVAC cabinets.
2. Water & Sewage Pumping Station: Underground pump house, municipal sewage lifting pump control cabinet.
3. Heat Exchange Station: Circulation pumps for heating systems.

🔥 Resistive Load Switching (AC-1, 200A)

For non-motor pure resistive load, maximum current rating increases to 200A

High-power electric heating tubes, resistance furnaces, drying oven heating circuits

Large 3-phase lighting loads

⚙️ Electrical Panel Industry

1. PLC Control Cabinet: PLC digital output drives coil, motor status feedback signal from built-in 1NO+1NC auxiliary contacts of contactor.
2. Soft Starter Bypass Contactor: Engage bypass after soft start completion for continuous operation.
3. Forward/Reversing Reversing Circuit: Equipped with LA9D1150 mechanical interlock + electrical interlock for cranes and lifting equipment.

⚠️ AC-4 frequent jogging (frequent forward/reverse, frequent start-stop) accelerates contact wear, current rating shall be increased.

⚡ New Energy & Energy Storage

Cooling water pumps and fan control cabinets for PV & energy storage systems

Fire exhaust fans for energy storage systems

📌 Selection & Operation Notes

1. Coil voltage: AC110V, widely used for imported equipment, foreign HVAC cabinets and legacy retrofit; AC220V version cannot be directly used for replacement.
2. Load category: AC-3 preferred for normal motor start-stop; use caution for AC-4 frequent jogging.
3. Protection matching: Must be fitted with LRD43 series thermal overload relay or upstream circuit breaker for short-circuit protection.
4. End-of-life notice: LC1D115F7 scheduled for phase-out by end of 2026; new projects prefer wide voltage upgrade model LC1D115AKUE.

Schneider TeSys Deca (Original TeSys D) LC1D 3-Pole Contactor Full Model List

LC1D: 3-pole normally open main contacts, standard 1NO+1NC auxiliary contacts; suffix code: F7=AC110V 50/60Hz; M7=AC220V; Q7=AC380V; B7=AC24V; E7=AC48V; 7=AC 50/60Hz

Example: LC1D09F7 = 9A, AC110V coil; LC1D115F7 is your target model

1. LC1D Base Models (AC-3 @440V)

Full Model = Base Model + Coil Suffix, e.g. LC1D09F7, LC1D115M7, LC1D150Q7

2. Common AC Coil Suffix Reference Table (50/60Hz)

DC coil: BD=DC24V, FD=DC110V, MD=DC220V; New wide voltage: KUE=100~250V AC/DC, EHE=48~130V AC/DC

3. Derivative Series (Same TeSys D Platform)
4. LC2D: Reversing contactor (integrated forward/reversing with built-in mechanical & electrical interlock)

LC2D09F7, LC2D12F7 … LC2D115F7

2. LC1DT: 4-pole contactor (DT20/DT25/DT32/DT40 etc., for single-phase / dual-circuit resistive load)
3. LC1DxxxS22: Safety mirror contact version, for safety circuit and emergency stop control
4. LC1DxxA6KUE: New generation wide voltage coil upgrade model (replaces legacy F7/M7/Q7)
5. Common Full Models of LC1D115

LC1D115F7: AC110V (your referenced model)

LC1D115M7: AC220V

LC1D115Q7: AC380V

LC1D115B7: AC24V

LC1D115E7: AC48V

LC1D115A6KUE: Wide voltage 100~250V AC/DC upgrade replacement

5. Matched LRD Thermal Relay Series (Direct Plug-in for LC1D)

LRD01~LRD38 (matches 09~38A); LRD43 series (matches 40~170A, LRD4365, LRD4367, LRD4369 for LC1D115)

6. Selection Remarks
7. Suffix with C (e.g. LC1D115F7C) = China local version, non-C = import version, identical electrical performance
8. Coil can be replaced separately for large frame LC1D115 and above; coils of small size 09~95A are non-replaceable
9. Old model LC1Dxxx6F7 being phased out; new projects prefer A6KUE wide voltage version