Contactor,circuit breaker,solar inverter,electric meter,solar batteries
NXC-185-380V (Order No.: 710010100000343)
| Segment | Meaning | Description |
| NXC | Product Series | CHINT Kunlun series AC contactor, upgraded compact structure replacing traditional CJX2 series |
| 185 | Rated Current | Rated operational current of main contact: 185A (AC-3, 400V) |
| 380V | Coil Voltage | Rated control coil voltage: AC380V, standard frequency 50Hz |
Supplementary Specifications: 3-pole (3P), 3 normally-open main contacts, 2NO+2NC auxiliary contacts, standard mounting type
- Core Specification Parameters
| Category | Technical Data | Remarks |
| Basic Properties | ||
| Product Type | Electromagnetic AC Contactor | Kunlun series, replacement for CJX2-1850 |
| Applicable Standards | GB/T 14048.4 / IEC 60947-4-1 | Compliant with GB 21518 safety standard |
| Rated Insulation Voltage | 1000V | Unified standard for specifications above 120A |
| Rated Operational Voltage | 220V~690V | Compatible with various industrial power supply systems |
| Electrical Parameters | ||
| Rated Operational Current (Ie) | 185A (AC-3, 400V) | Matches motor power around 90kW |
| Rated Making Capacity | 10×Ie (AC-3) | 1850A, reliable load switching |
| Rated Breaking Capacity | 8×Ie (AC-3) | 1480A, safe fault current interruption |
| Coil Parameters | AC380V, 50Hz, power approx. 170VA | Pick-up/holding power ratio about 3:1 |
| Auxiliary Contacts | 2NO+2NC, rated current 5A | Signal transmission for control circuits |
| Mechanical Parameters | ||
| Pole Number | 3P (3 NO main contacts) | Standard configuration, 4P version optional |
| Mounting Method | Standard 35mm DIN rail / screw mounting | Fits mainstream control cabinets |
| Housing Material | Flame-retardant engineering plastic | UL94 V0 flame resistance grade |
| Protection Degree | IP20 | Finger-touch safe, indoor cabinet installation only |
| Mechanical Life | 10,000,000 operations | Long service life, low maintenance frequency |
| Electrical Life | 1,000,000 operations (AC-3) | Suitable for frequent start-stop operation |
| Environmental Parameters | ||
| Operating Temperature | -30°C ~ +70°C | Wide temperature range for harsh industrial conditions |
| Storage Temperature | -40°C ~ +85°C | Meets storage and transportation requirements |
| Relative Humidity | 5%~95%, non-condensing | Adaptable to humid working environment |
| Altitude | ≤2000m | Derating required for higher altitude |
- Cross-brand Replacement Comparison
| Brand | Model | Similar Features | Differences |
| CHINT | NXC-185-380V | Reference model | Kunlun series, cost-effective, preferred domestic replacement |
| Schneider | LC1D18500Q7 | 185A, 3P, 380V coil | Higher price, 1NO+1NC auxiliary contacts |
| ABB | A185-30-11 | 185A, 3P, 380V coil | 1NO+1NC auxiliary contacts, different mounting dimensions |
| Siemens | 3RT2036-1AP00 | 185A, 3P, 380V coil | High price, fast response, ideal for precision control |
| DELIXI | CDM3-185 | 185A, 3P, 380V coil | Domestic alternative, similar price, slightly lower performance |
Replacement Notes:
- Confirm identical coil voltage, pole number and auxiliary contact configuration before replacement
- Verify mounting hole compatibility among different brands
- Check derating curve matching for high altitude and special environments
- Matching CHINT NXR thermal overload relay is recommended for optimal protection
- Full Series Model List (Core NXC Models)
| Model | Rated Current | Coil Voltage | Auxiliary Contact | Pole | Order No. |
| NXC-06-220V | 6A | AC220V | 1NO+1NC | 3P | 710010100000001 |
| NXC-12-380V | 12A | AC380V | 1NO+1NC | 3P | 710010100000002 |
| NXC-18-220V | 18A | AC220V | 1NO+1NC | 3P | 710010100000003 |
| NXC-25-380V | 25A | AC380V | 1NO+1NC | 3P | 710010100000004 |
| NXC-32-220V | 32A | AC220V | 1NO+1NC | 3P | 710010100000005 |
| NXC-40-380V | 40A | AC380V | 1NO+1NC | 3P | 710010100000006 |
| NXC-50-220V | 50A | AC220V | 1NO+1NC | 3P | 710010100000007 |
| NXC-65-380V | 65A | AC380V | 1NO+1NC | 3P | 710010100000008 |
| NXC-80-220V | 80A | AC220V | 2NO+2NC | 3P | 710010100000009 |
| NXC-100-380V | 100A | AC380V | 2NO+2NC | 3P | 710010100000305 |
| NXC-120-220V | 120A | AC220V | 2NO+2NC | 3P | 710010100000306 |
| NXC-150-380V | 150A | AC380V | 2NO+2NC | 3P | 710010100000307 |
| NXC-185-380V | 185A | AC380V | 2NO+2NC | 3P | 710010100000343 |
| NXC-225-380V | 225A | AC380V | 2NO+2NC | 3P | 710010100000344 |
| NXC-265-380V | 265A | AC380V | 2NO+2NC | 3P | 710010100000345 |
Model Extension Rules:
Suffix M: Reversible contactor (e.g. NXC-25M-220V)
Suffix 4P: 4-pole contactor (e.g. NXC-65-4P-380V)
Suffix Z: DC coil (e.g. NXC-18-24Z)
Auxiliary contact expansion: Max 6NO+6NC with F4-XX auxiliary contact block
- Common Faults & Troubleshooting
| Fault Phenomenon | Possible Causes | Solutions |
| Contactor fails to pull in | 1. Abnormal coil voltage | 1. Verify stable 380V power supply |
| 2. Open control circuit | 2. Check wiring and fuse | |
| 3. Burned coil | 3. Test coil resistance (normal ~800Ω), replace damaged coil | |
| 4. Mechanical jam | 4. Clean iron core and reset spring | |
| Loud noise after pull-in | 1. Oil contamination on core surface | 1. Clean contact surface of iron core |
| 2. Broken short-circuit ring | 2. Replace iron core or short-circuit ring | |
| 3. Undervoltage | 3. Ensure voltage ≥85% rated value | |
| Overheated / burned contacts | 1. Excessive load current | 1. Upgrade to higher capacity model |
| 2. Poor contact performance | 2. Clean contacts and adjust contact pressure | |
| 3. Frequent switching | 3. Optimize control logic to reduce unnecessary switching | |
| 4. Failed arc suppression | 4. Inspect and maintain arc shield | |
| Malfunction of auxiliary contacts | 1. Contact oxidation | 1. Polish and clean contacts |
| 2. Contact ablation | 2. Replace auxiliary contact assembly | |
| 3. Loose wiring | 3. Fasten terminal connections | |
| Overheating and burnt coil | 1. Overvoltage | 1. Keep voltage within rated range |
| 2. Excessive operation frequency | 2. Reduce switching frequency or adopt AC-4 type contactor | |
| 3. High ambient temperature | 3. Improve ventilation condition | |
| 4. Stuck iron core | 4. Ensure flexible mechanical movement |
- Air Freight Compliance & Certifications
- Certifications
CE certification, compliant with EU Machinery Directive
cULus certification complying with North American safety standards
CCC compulsory certification of China
RoHS environmental compliance
- Air Transport Regulations
No built-in lithium battery or super capacitor, classified as ordinary industrial electrical equipment
Non-dangerous goods, conforms to IATA DGR Class 9 requirements
Standard industrial packaging, max 20 units per carton to avoid collision damage
Recommended marks: FRAGILE, ELECTRICAL EQUIPMENT, KEEP DRY
- Application Environment & Adaptation
Applicable Scenarios
Industrial Motor Control: Start, stop and reverse control of three-phase asynchronous motors below 90kW
Fan & Water Pump System: HVAC, industrial circulating water and sewage aeration equipment control
Compressor Control: Heavy-duty air and refrigeration compressors for AC-3 working condition
Automatic Production Line: Core component for sequence control and interlock protection
Building Electrical System: Central air conditioning, fire water pump and elevator room equipment control
Mining Machinery: Remote control and protection for belt conveyors and crushers
Metallurgical Equipment: Electrical control system for small rolling mills and furnace auxiliary units
Unsuitable Scenarios
DC circuit control (Select dedicated NXC-Z series DC contactors)
High-frequency operation over 1200 cycles per hour (AC-4 contactor or solid state relay recommended)
Use above 2000m altitude without power derating
Severe vibration environment over 5g without damping measures
Corrosive gas environment without anti-corrosion protection
- Application Cases
Case 1: Central Air Conditioning Control of Large Shopping Mall
Application: Control of 3 sets 90kW water chillers and 4 sets 75kW cooling tower fans
Challenges: 20-30 daily start-stop cycles, high reliability and energy saving requirement
Solution: NXC-185-380V + NXR-185 thermal overload relay + intelligent PLC control system
Result: Trouble-free operation for 2 years, 30% energy saving with frequency conversion, 50% maintenance cost reduction
Case 2: Conveyor System for Auto Parts Production Line
Application: 12 belt conveyor lines with 75kW driving motor each, sequential start-stop and interlock protection
Challenges: Multi-motor synchronous control, frequent forward/reverse rotation, oily environment
Solution: NXC-185-380V for main drive + NXC-65-380V for auxiliary drive + safety relay
Result: Precise synchronous operation, IP20 protection against oil contamination, mechanical life up to 8 million cycles
- Selection Guidelines
Quick Rules
Rated current: NXC-X ranging 6~630A, matching motor power about X/2 kW
Standard coil voltage: 220V / 380V; optional 110V / 24V / 48V
Auxiliary contact: 1NO+1NC for ≤80A; 2NO+2NC for ≥100A
Mounting: Universal 35mm DIN rail for mainstream cabinets
Protection class: IP20, indoor cabinet use only, outdoor exposed installation prohibited
Specific Application Scenarios of NXC185-380V
- Motor Control
Start, stop and reverse control of three-phase asynchronous motors below 90kW
Continuous operation control of constant-load equipment including fans, pumps and compressors
Motor control with operation frequency ≤1200 cycles per hour
- Industrial Automation System
Sequence control and interlock protection of production line facilities
Peripheral equipment control of robot workstations
Stacker and conveyor control in automated warehouses
- Construction & Infrastructure
Water chiller and cooling tower control for commercial central air conditioning
Fire water pump and exhaust fan control of high-rise buildings
Ventilation system control of underground parking lots
- Energy & Environmental Protection
Aeration equipment and sludge pump control in sewage treatment plants
Switch control of small photovoltaic inverters and energy storage systems
Control system of waste disposal equipment
- Mining & Metallurgy
Belt conveyor and crusher control in mines
Auxiliary equipment control of small metallurgical furnaces
Electrical control system of mineral processing facilities
Restricted Application
DC circuit application
Operation frequency exceeding 1200 cycles per hour
Underrated use at altitude over 2000m
Heavy vibration environment without damping measures
Corrosive gas environment without protective treatment
