Chint NC8-18 Contactor Series
Chint NC8-18 AC Contactor, 18A, 3P, 1NO+1NC
18A, 3-pole industrial AC contactor for motor control and remote switching up to 690V. Compact NC8 series design with 1NO+1NC auxiliary contacts, wide coil voltage options, and compatibility with NR2 thermal overload relays.
The Chint NC8-18 AC Contactor is an 18A, 3-pole industrial contactor designed for remote switching and control of AC motors and circuits up to 690V. As part of the NC8 series, it offers reliable performance, multiple coil voltage options, and easy integration with NR2 thermal overload relays for complete motor protection.
Key Features
18A rated operational current under AC-3 at 415V for motor loads
Rated operational voltage up to 690V AC, 50/60 Hz
Available in 3-pole and 4-pole configurations within the NC8-18 family
Standard variants include 3NO main contacts with 1NO + 1NC auxiliary contacts
Wide AC and DC coil voltage options—24V, 48V, 110V, 220V, 230V, 380V, 415V
DIN rail or panel mounting for flexible installation in MCCs and control panels
Can be combined with Chint NR2 series thermal overload relays to form DOL starters
Silver alloy contacts for low contact resistance and long electrical life
Robust housing suitable for industrial environments, including HVAC and pump panels
Built to IEC/EN 60947-4-1 and CE certified for international compliance
Technical Specifications
| Parameter | Value |
|---|---|
| Model | NC8-18 |
| Brand | Chint |
| Series | NC8 AC Contactor Series |
| Product Type | AC Power Contactor |
| Rated Operational Current (AC-3) | 18 A at 415 V |
| Rated Operational Voltage (Ue) | Up to 690 V AC, 50/60 Hz |
| Rated Insulation Voltage (Ui) | Up to 690 V (typical for NC8 series) |
| Poles | 3P (3 main poles); 4P options available in series |
| Main Contact Configuration | 3 NO (standard NC8-18 variant) |
| Auxiliary Contacts | Typically 1 NO + 1 NC (other options possible) |
| Coil Voltage Options | 24V, 48V, 110V, 220V, 230V, 380V, 415V AC/DC (by variant) |
| Frequency | 50 / 60 Hz |
| Utilization Category | AC-3 (motor), AC-1 (non-inductive / slightly inductive) |
| Mounting | DIN rail and panel/screw mounting |
| Compatible Overload Relay | Chint NR2 series (for motor overload protection) |
| Contact Material | Silver alloy |
| Application | Motor control, remote switching, HVAC, pumps, general power |
| Approx. Dimensions (L × W × H) | ~5.0 × 8.0 × 9.0 cm |
| Approx. Weight | ~0.45 kg |
| Standards Compliance | IEC/EN 60947-4-1, CE |
Applications
DOL starting and stopping of small and medium AC induction motors
Pump, fan and blower motor control in industrial plants
HVAC compressor and AHU motor control panels
General-purpose power switching for heating, lighting and distribution circuits
OEM machines and automation systems requiring frequent switching
MCCs and distribution boards using modular contactor assemblies
What’s in the Box?
1 × Chint NC8-18 AC Contactor (coil voltage as ordered)
Integrated auxiliary contact block (1NO + 1NC)—depending on variant
Product label with ratings and terminal designations
Basic wiring/installation information (if supplied by manufacturer)
FAQ
Q1. What is the current rating of the Chint NC8-18?
A1. The NC8-18 has a rated operational current of 18A under AC-3 at 415V, suitable for small to medium AC motors.
Q2. How many poles does the NC8-18 have?
A2. Standard versions are 3-pole (3P) contactors with 3 normally open main contacts. Some NC8 series variants are also available in 4-pole configurations.
Q3. Which coil voltages are available for NC8-18?
A3. The NC8-18 is available with multiple AC/DC coil voltages, commonly 24V, 48V, 110V, 220V, 230V, 380V, and 415V, depending on the exact variant.
Q4. Can I use NC8-18 with a thermal overload relay?
A4. Yes. It is compatible with the Chint NR2 series thermal overload relays, allowing you to build a complete DOL starter with overload protection.
Q5. What standards does the contractor comply with?
A5. NC8-18 is designed in line with IEC/EN 60947-4-1 and carries CE certification, making it suitable for international projects.
Q6. Where is the NC8-18 commonly used?
A6. It is used in motor control centers, HVAC systems, pump stations, industrial panels, and OEM equipment for frequent motor switching and power control.