The Chint NC8-50 AC Contactor is a 50A industrial-duty power contactor designed for remote switching and direct-on-line motor control applications up to 690V. Available in 3-pole and 4-pole variants with multiple coil voltage options, it delivers reliable performance for HVAC systems, automation panels, and heavy electrical loads.

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Key Features

• 50A AC-3 rating at 415V for medium-to-heavy motor loads

• Rated operational voltage up to 690V AC, 50/60 Hz

• 3-pole and 4-pole configurations to suit various load requirements

• Standard 1NO + 1NC auxiliary contacts

• Available coil voltages: 24V / 48V / 110V / 230V / 380V (AC or DC depending on model)

• DIN-rail or screw mounting for fast installation

• Works with Chint NR2 thermal overload relays for motor protection

• Can form electromagnetic motor starters

• Long mechanical and electrical life for industrial use

• Conforms to IEC/EN 60947-4-1

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Technical Specifications 

Parameter	Details
Model	NC8-50
Brand	Chint
Rated Operational Current (AC-3)	50 A at 415 V
Rated Operational Voltage (Ue)	Up to 690 V AC
Rated Insulation Voltage (Ui)	Up to 690 V
Poles	3P or 4P variants
Main Contact Configuration	3NO (3P), 4NO (4P)
Auxiliary Contacts	1NO + 1NC (expandable with aux blocks)
Coil Types	AC or DC
Coil Voltage Options	24V / 48V / 110V / 230V / 380V
Frequency	50 / 60 Hz
Utilization Categories	AC-3, AC-1
Mounting	DIN Rail / Panel Mount
Compatibility	Works with NR2 series thermal overload relays
Standards	IEC/EN 60947-4-1
Dimensions	7.5 × 10.5 × 12.0 cm
Weight	0.85 kg

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Applications 

• AC motor starting and stopping

• Motor control centres (MCCs)

• HVAC compressors and blowers

• Industrial automation machinery

• Power distribution systems

• Pump, fan, and conveyor control panels

• Lighting and resistive load switching

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What’s in the Box?

• 1 × Chint NC8-50 AC Contactor

• Built-in auxiliary contacts (1NO + 1NC)

• Manufacturer’s labeling and wiring details

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FAQ 

Q1. What is the current rating of NC8-50?
A1. It is rated 50A under AC-3 duty at 415V.

Q2. Is it available in both 3-pole and 4-pole versions?
A2. Yes. Models include NC8-50 3P (3NO) and NC8-50/4 4P (4NO).

Q3. What coil voltages can I choose from?
A3. Options include 24V, 48V, 110V, 230V, and 380V in AC or DC.

Q4. Can I use this with a thermal overload relay?
A4. Yes, it is compatible with Chint NR2 series overload relays.

Q5. Is it suitable for motor starters?
A5. Yes, NC8-50 is commonly used in direct-on-line (DOL) starters.

Q6. What standards does it comply with?
A6. It conforms to IEC/EN 60947-4-1 industrial switchgear standards.