Chint NC8-40 Contactor Series
Chint NC8-40 AC Contactor, 40A, 3P/4P, 1NO+1NC
40A industrial AC contactor for remote switching and frequent starting of AC motors up to 690V. Available in 3-pole and 4-pole versions with multiple coil voltages and auxiliary contacts, suitable for motor control, power distribution, and automation panels.
The Chint NC8-40 AC Contactor is a 40A power contactor designed for remote switching and frequent starting of AC motors and other loads in industrial and commercial panels. With 3-pole and 4-pole variants, multiple coil voltages, and built-in auxiliary contacts, it delivers reliable performance in motor control, power distribution, and automation systems.
Key Features
40A rated current for medium motor and power circuit loads
Rated operational voltage up to 690V AC, 50/60 Hz
Available in 3-pole and 4-pole configurations (NC8-40, NC8-40/4)
Typical main contact sets: 3NO (3P model) or 4NO (4P model)
Built-in auxiliary contacts (e.g. 1NO+1NC or 4NO, depending on model)
Multiple AC coil voltages: 24V, 48V, 110V, 230V, 380V (model-dependent)
DIN rail or screw mounting for easy panel integration
Conforms to IEC/EN 60947-4-1 for low-voltage switchgear
Can be paired with thermal overload relays to form electromagnetic starters for overload protection
Modular design, compatible with auxiliary blocks, delay modules and surge suppressors
Compact footprint for space-saving control panel layouts
Technical Specifications
| Parameter | Value |
|---|---|
| Model | NC8-40 (series) |
| Brand | Chint |
| Product Type | AC Power Contactor |
| Rated Current | 40 A |
| Rated Operational Voltage (Ue) | Up to 690 V AC, 50/60 Hz |
| Number of Poles | 3-pole and 4-pole variants |
| Main Contacts | 3 NO (NC8-40 3P); 4 NO (NC8-40/4 4P) |
| Auxiliary Contacts (typical) | 1 NO + 1 NC or 4 NO (model-dependent) |
| Coil Type | AC operational |
| Coil Voltage Options | 24V, 48V, 110V, 230V, 380V AC (exact options per variant) |
| Utilization Category | AC-3 for motor loads, AC-1 for non-inductive/slightly inductive |
| Frequency | 50 / 60 Hz |
| Mounting | DIN-rail (35 mm) or panel/screw mounting |
| Standards Compliance | IEC/EN 60947-4-1 |
| Typical Accessories | Auxiliary contact blocks, thermal overload relays, delay modules, surge suppressors |
| Applications | Motor control, power distribution, lighting, automation systems |
| Approx. Dimensions (L×W×H) | 6.5 × 9.5 × 11.0 cm |
| Approx. Weight | 0.70 kg |
Applications
Direct-on-line starting and stopping of three-phase induction motors
Motor control centres (MCCs) and distribution boards
HVAC compressors, AHU fans and pump control panels
Industrial automation systems and OEM machinery
Lighting and heating circuits in commercial and industrial buildings
Power factor correction and general power switching (with appropriate accessories)
What’s in the Box?
1 × Chint NC8-40 AC Contactor (specific pole and coil voltage version as ordered)
Integrated auxiliary contacts (as per selected model, e.g., 1NO+1NC)
Rating label with terminal markings and electrical data
Basic installation/wiring information (if supplied by manufacturer)
FAQ
Q1. What is the current rating of the Chint NC8-40 contactor?
A1. The NC8-40 series is rated for 40A in AC circuits, suitable for medium motor and power loads.
Q2. Which pole configurations are available?
A2. The NC8-40 series is available in 3-pole (3NO) and 4-pole (4NO) versions, so you can choose based on your circuit requirements.
Q3. What coil voltages are supported?
A3. Models are offered with AC coils at 24V, 48V, 110V, 230V, and 380V, depending on the specific variant.
Q4. Can NC8-40 be used with a thermal overload relay?
A4. Yes. It is designed to be used with a suitable thermal overload relay to form an electromagnetic starter for motor overload protection.
Q5. Which standards does the NC8-40 comply with?
A5. The series conforms to IEC/EN 60947-4-1 and is suitable for industrial low-voltage motor control applications.
Q6. How is the NC8-40 mounted in a panel?
A6. It supports both DIN-rail mounting and screw/panel mounting, making it easy to integrate into existing and new control panels.