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CJX2-3210 is a 3-pole 32A contactor de CA from CHINT CJX2 series, con 3 NO main poles + 1 NO auxiliary contact.
It is suitable for controlling 15kW motors at AC-3 380V. Coil voltages include 220V/380V and others.
Direct replacement models include Schneider LC1N3210, Siemens 3RT6035-1AN20, etc..
- Model Explanation & Basic Positioning
| Parte del modelo | Significado |
| CJX2 | CHINT AC contactor series (equivalent to Schneider LC1‑D series) |
| 32 | Rated operational current 32A (AC‑3 utilization category at 400V) |
| 10 | Contactos auxiliares: 1 NO + 0 CAROLINA DEL NORTE |
Posicionamiento del producto:
Industrial‑grade general‑purpose AC contactor, suitable for frequent starting and control of AC motors.
Can form a magnetic starter with thermal overload relays for motor protection.
- Parámetros técnicos clave
| Artículo | Especificación |
| Rated operational voltage | Up to 690V AC (50/60Hz) |
| Rated operational current | 32A (AC‑3 400V), thermal current Ith = 50A |
| Controlled power | 15kilovatios (AC‑3 380V), 21A (AC‑3 660V) |
| Auxiliary contact | 1 NO, rated 5A/220V AC |
| voltaje de la bobina | Opcional: 220V/380V/110V/36V/24V AC |
| Insulation characteristics | UI = 660V, compliant with GB14048.4 / IEC60947‑4‑1 |
| Mecánico / electrical life | 10 millones de veces / 1 millones de veces (AC‑3) |
| Dimensiones (L×W×H) | 83×58×101 mm |
| Montaje | Carril DIN estándar de 35 mm |
- Características estructurales & Materiales
- Silver alloy contacts: Excellent conductivity and arc resistance, ensuring reliable switching.
- 32‑sheet silicon steel core: Reduces hysteresis loss, smoother pull‑in, stable operation.
- Flame‑retardant housing: Meets V0 flame rating, improves safety.
- Clear side marking: Modelo, Voltaje, Certificación CCC, etc..
- Applications
- Automatización industrial: Motor control, fans, zapatillas, compresores.
- Building electrical: climatización, bombas contra incendios, exhaust fans.
- Agricultural machinery: Irrigation, feed processing equipment.
- Power systems: Remote circuit control in distribution panels.
- Typical matching: Long‑running oil station motors, unidirectional equipment (no NC auxiliary required).
- Comparison Within CJX2 Series
| Modelo | Corriente nominal | Aux. Contactos | AC‑3 380V Power | Dimensiones (milímetros) |
| CJX2‑0910 | 9A | 1 NO | 4kilovatios | 73×47×82 |
| CJX2‑1810 | 18A | 1 NO | 7.5kilovatios | 73×47×82 |
| CJX2‑2510 | 25A | 1 NO | 11kilovatios | 83×58×96 |
| CJX2‑3210 | 32A | 1 NO | 15kilovatios | 83×58×101 |
| CJX2‑4011 | 40A | 1 NO + 1 CAROLINA DEL NORTE | 18.5kilovatios | 128×79×116 |
| CJX2‑6511 | 65A | 1 NO + 1 CAROLINA DEL NORTE | 30kilovatios | 128×79×116 |
- Cross‑Brand Replacements
| Marca | Modelo de reemplazo | Compatibilidad |
| Schneider | LC1N3210M7N / LC1R3210M5N | Mismas dimensiones & parámetros |
| siemens | 3RT6035‑1AN20 (domestic type) | Functionally equivalent, mounting compatible |
| TEJIDO | A145‑30‑11 (32A class) | Aux. can be configured as 1 NO |
| Delicioso | CJX2‑3210 | Fully interchangeable |
| Changshu Switch | CK3‑3210 | Same performance & parámetros |
- Selección & Application Notes
- voltaje de la bobina: Selected per control circuit (commonly 220V / 380V).
- Cargar coincidencia: 32A ≈ 15kW at AC‑3 380V; avoid overload.
- Aux. contact expansion: F4‑11 or similar modules can be added.
- Protection coordination: Used with NR2 series thermal relays (p.ej. NR2‑36) for overload protection.
- Environment: Operating temperature ‑5°C ~ +40°C; avoid dust & corrosive gas.
Packing: 4 pcs/box, 32 pcs/carton
Comparison of CHINT Contactor Series
Overview:
CHINT contactors are divided into:
Classic (CJX2/CJ20/CJX8), Actualizado (NXC/NC5), High‑Power (NC8), DC Special (CJZ8/NCZ5).
NXC fully replaces CJX2 with better performance; NC5 focuses on intelligence & modularity; NC8 covers ultra‑high current; CJZ8 is for DC control.
Priority: NXC / NC5; use special series for special applications.
- Series Positioning & Reemplazo
| Serie | Posicionamiento | Replaced By / Replaces | Características clave |
| CJX2 | Classic general | Fully replaced by NXC | Cost‑effective, simple structure, flexible aux. contactos |
| NXC | New generation | Replaces CJX2, upgraded | High efficiency, long life, standard 1NO+1NC, strong modularity |
| NC5 | Smart & premium | High‑end market | Wide temp ‑25°C~+55°C, communication, complex automation |
| NC8 | High‑power heavy‑duty | Independent, up to 1000A | Up to 1000A AC‑3 415V, for large motors & heavy industry |
| CJX8 | Traditional heavy‑duty | Partially replaced by NC8 | Direct‑operated double break, suitable for legacy retrofits |
| CJ20 | Traditional general | Replaced by NXC/NC5 | Mature structure, low cost, civil & light industry |
| NXC‑XMG | Special load | Independent | For fans & zapatillas, high energy saving |
| CJZ8/NCZ5 | DC dedicated | Independent | Enhanced arc extinguishing, new energy & energy storage |
- Parámetros técnicos clave
2.1 Basic Electrical Data
| Serie | Rango actual | Tensión nominal | AC‑3 380V Power | Standard Aux. Contactos |
| CJX2 | 9A~95A | Up to 690V | 0.75kW~45kW | Below 32A: 1NO/1NC; ≥40A:1NO+1NC |
| NXC | 6~630A | Up to 690V | 0.37kW~315kW | Full range: 1NO+1NC |
| NC5 | 6~630A | Up to 690V | 0.37kW~315kW | 1NO+1NC, expandable to 6NO+6NC |
| NC8 | 6A~1000A | Up to 690V | 0.37kilovatios~500kW | 2NO+2NC, expandable to 6NO+6NC |
| CJX8 | 9A~250A | Up to 660V | 4kW~110kW | 3NO+1NO/1NC or 4NO |
| CJ20 | 10~630A | Up to 660V | 5.5kW~315kW | 1NO+1NC |
2.2 Life & Environment
| Serie | Vida mecánica | Vida eléctrica (AC‑3) | Operating Temp | Montaje |
| CJX2 | 10 million | 1 million | ‑5°C~+40°C | 35mm DIN / screw |
| NXC | 12 million | 1.2 million | ‑25°C~+55°C | 35mm DIN / screw |
| NC5 | 15 million | 1.5 million | ‑25°C~+55°C | 35mm DIN / screw |
| NC8 | 10 million | 0.8 million (high current) | ‑25°C~+55°C | Mainly screw |
| CJ20 | 8 million | 0.8 million | ‑5°C~+40°C | Tornillo |
- Structure & Diferencias funcionales
3.1 CJX2 (Classic)
Structure: Direct‑operated single break, modular; F4 aux., F5 timer, NCF1 side aux. available.
Contactos: aleación de plata, 3P main, flexible aux. (10/01/11).
Bobina: AC/DC, 24V~380V.
3.2 NXC (Actualizado)
Optimized magnetic system, coil power ≈ 30% lower than CJX2.
Improved silver alloy contacts, better arc extinguishing.
Standard 1NO+1NC; supports aux., timer, mechanical interlock.
3.3 NC5 (Smart Premium)
Optional communication module (Modbus, etc.) for IIoT.
Wide temperature, suitable for outdoor & harsh environments.
Enhanced insulation & short‑circuit withstand.
3.4 NC8 (High‑Power)
Enhanced arc chamber for high‑current breaking up to 1000A.
Optimized heat dissipation for heavy‑duty continuous operation.
Heavy‑duty mechanical structure, high vibration resistance.
3.5 CJX8 (Traditional Heavy‑Duty)
Direct‑operated double break; front‑connected or rear‑connected versions.
Arriba a 4 polos (3 main + 1 aux or 4 main) for special applications.
3.6 DC Contactors
CJZ8: Low‑voltage DC (12V~220V), up to 40A, small DC loads.
NCZ5: High‑voltage DC (up to 1500V), up to 500A, new energy vehicles & energy storage.
Dedicated DC arc extinguishing structure.
- Escenarios de aplicación
| Serie | Best For | Typical Load | Not Recommended |
| CJX2 | Legacy retrofit, budget projects | Small motors ≤15kW, iluminación, calefacción | High‑end automation, harsh environments |
| NXC | Automatización industrial, new projects | Medium motors ≤315kW, fans, zapatillas | Ultra‑large motors, special DC loads |
| NC5 | Smart factories, complex systems, outdoor | Medio & large motors, production lines | Cost‑sensitive simple circuits |
| NC8 | Large industry, fuerza, metallurgy | Large motors ≤500kW, transformadores | Small loads, civil buildings |
| CJX8 | Legacy maintenance, special control | Traditional machinery, special circuits | New smart projects |
| CJ20 | Civil, light industry, temporary power | AC units, zapatillas, small machines | Cambio frecuente, high‑end automation |
| DC series | New energy, energy storage, rail | DC motors, batteries, cargadores | AC loads |
- Guía de selección & Replacements
5.1 Selection Priority
- New projects: NXC (replaces CJX2)
- Smart/complex systems: NC5
- Ultra‑high power >315kilovatios: NC8
- DC loads: CJZ8 / NCZ5
- Legacy retrofit: CJX2/CJ20/CJX8 or upgrade to NXC/NC5
5.2 Cross‑Series Replacement
| Original | Recommended Replacement | Advantage |
| CJX2‑09~95 | NXC‑06~100 | Standard 1NO+1NC, life +20%, power ‑30% |
| CJ20‑10~630 | NXC‑12~630 / NC8‑12~1000 | Better performance, modular, easier maintenance |
| CJX8‑09~250 | NC8‑06~250 | Better arc extinguishing, wide temperature |
5.3 Model Selection Tips
Current: 32A ≈ 15kW; 63A ≈ 30kW; 100A ≈ 45kW at AC‑3 380V.
Aux. contactos: NXC has 1NO+1NC standard; CJX2 uses 10/01/11.
Bobina: 220V/380V/110V/36V/24V AC/DC.
Montaje: 35mm DIN preferred; screw for high power.
- Special Notes: CHINT CJX2‑3210
As a representative model of CJX2 series, CJX2‑3210 is a 3‑pole 32A AC contactor with 3 SIN contactos principales + 1 NO auxiliary contact, suitable for 15kW motor control at AC‑3 380V.
Common replacements:
CHINT NXC‑3210 (upgraded)
Schneider LC1N3210M7N
Siemens 3RT6035‑1AN20
ABB A145‑30‑11 (32A class)
