NCK3 40/2 Contactor
Chint NCK3-40/2 Definite Purpose Contactor, 40A, 2-Pole
2-pole, 40A definite purpose AC contactor with 2NO contacts for HVACR, small motor, and industrial control loads. Available in 220/230V AC coil options for reliable field and panel use.
Chint NCK3-40/2 is a 2-pole definite purpose AC contactor rated 40A, designed for HVACR equipment, small motor loads, and industrial automation circuits. With 2 Normally Open (2NO) main contacts and 220/230V AC coil options, it offers compact and reliable switching for field units and control panels.
Key Features
40A, 2-pole definite purpose AC contactor
2 Normally Open (2NO) main contacts for line switching
AC operational coil with common 220V and 230V versions (other voltages available in NCK3-40 family)
50/60 Hz coil operation
Rated insulation voltage up to 630V
Utilization category AC-1 and AC-8a for resistive and HVAC/R applications
Short-circuit rating 5 kA rms SYM at up to 600 V (as per typical data)
Suitable for compressors, blowers, fans, heaters and small industrial loads
IP00 construction for enclosed control panel use
Complies with UL/CSA 60947-4-1 and IEC/EN 60947-4-1 standards
Technical Specifications
| Parameter | Value |
|---|---|
| Model | NCK3-40/2 |
| Brand | Chint |
| Product Type | Definite Purpose Contactor |
| Current Rating | 40 A |
| Number of Poles | 2 Pole |
| Main Contacts | 2 NO |
| Electricity Type | AC |
| Coil Type | AC operational |
| Coil Voltage Options | 220 V AC / 230 V AC (other voltages in NCK3-40 range) |
| Frequency | 50 / 60 Hz |
| Rated Insulation Voltage (Ui) | 630 V |
| Utilization Category | AC-1, AC-8a |
| Short Circuit Rating | 5 kA rms SYM, 600 V max (typical) |
| Protection Class | IP00 |
| Standards | UL/CSA 60947-4-1, IEC/EN 60947-4-1 |
| Dimensions (L × W × H) | ~92 × 55 × 70 mm |
| Approx. Weight | ~0.32 kg |
| Typical Applications | HVACR, compressors, blowers, heaters, automation |
Applications
HVACR units—compressors, condensers, evaporator fans
Refrigeration and cold room equipment
Air handling units, heat pumps and small chiller systems
Light-duty motor control for pumps, fans and blowers
Resistive loads such as heaters and electric coils
Industrial and commercial control panels requiring compact contactors
What’s in the Box?
1 × Chint NCK3-40/2 Definite Purpose Contactor (coil voltage as ordered)
Product label with terminals and rating details
Basic installation/wiring instructions (if provided by manufacturer)
FAQ
Q1. What is the current rating of the NCK3-40/2 contactor?
A1. The Chint NCK3-40/2 is rated 40A, suitable for HVACR and light industrial loads in AC-1/AC-8a applications.
Q2. How many poles does it have, and what contact configuration does it have?
A2. It is a 2-pole contactor with 2 Normally Open (2NO) main contacts.
Q3. Which coil voltages are available?
A3. Common versions are 220V AC and 230V AC, 50/60 Hz. Other coil voltages such as 24V, 110V, or 240V may be available in the NCK3-40 series.
Q4. Where is this contactor typically used?
A4. It is primarily used in HVACR systems, refrigeration units, compressors, blowers, fans, heaters, and small automation panels.
Q5. Does it comply with international standards?
A5. Yes, it complies with UL/CSA 60947-4-1 and IEC/EN 60947-4-1 low-voltage switchgear standards.
Q6. Is it suitable for direct outdoor use?
A6. No. It has IP00 protection and should be installed inside an appropriate enclosure or panel.