NXT Series 9A-630A 3P AC Contactor, 24V-380V Coil
NXT Series 9A-630A 3P AC Contactor, 24V-380V Coil
The NXT Series AC Contactor is a comprehensive range of 3-pole magnetic contactors, available in ratings from 9A to 630A, designed for low-voltage AC power distribution and motor control systems. With common coil voltages (24V/110V/220V/380V AC), built-in auxiliary contacts, and DIN rail/screw mounting options, these contactors offer reliable switching for motors, lighting, heating, and other loads. Ideal for industrial automation, HVAC systems, and commercial power distribution, they provide long mechanical life and high contact reliability.
The NXT Series AC Contactor is a comprehensive range of 3-pole magnetic contactors, available in ratings from 9A to 630A, designed for low-voltage AC power distribution and motor control systems. With common coil voltages (24V/110V/220V/380V AC), built-in auxiliary contacts, and DIN rail/screw mounting options, these contactors offer reliable switching for motors, lighting, heating, and other loads. Ideal for industrial automation, HVAC systems, and commercial power distribution, they provide long mechanical life and high contact reliability.
1. Product Overview
The NXT Series AC Contactor is a versatile, high-performance line of 3-pole magnetic contactors engineered for low-voltage AC power distribution and motor control systems. Available in a wide range of ratings from 9A to 630A, these contactors provide reliable switching for motors, lighting, heating, and other low-to-high power loads.
Built with high-quality silver alloy contacts and a robust magnetic system, the NXT series offers long mechanical and electrical life. All models include built-in auxiliary contacts (1NO+1NC) for status feedback and control circuit integration. Compact models use DIN rail mounting, while larger models feature screw mounting for stability. The NXT series is the ideal choice for industrial automation, HVAC systems, commercial power distribution, and heavy machinery applications.
2. Key Features
- Wide Current Range: Available in ratings from 9A, 12A, 18A, 25A, 32A, 40A, 50A, 65A, 80A, 95A, 115A, 150A, 185A, 225A, 265A, 330A, 400A, 500A to 630A.
- Multiple Coil Voltages: Compatible with 24V, 110V, 220V, and 380V AC coil options to match common control system voltages.
- Built-in Auxiliary Contacts: Standard 1NO + 1NC auxiliary contacts for control circuit integration and status feedback.
- High-Quality Silver Alloy Contacts: Low-resistance contacts minimize power loss and extend electrical life.
- Flexible Mounting: DIN rail mount for compact models (≤95A) and screw mount for larger models.
- Robust Magnetic System: Efficient coil design ensures reliable pull-in and release, even at low voltage.
- Dual Rating Capability: Suitable for both AC-3 (motor control) and AC-1 (resistive load) applications.
- IEC Certified: Compliant with IEC 60947-4-1 standards for safety and reliability.
3. Technical Specifications
| Parameter | NXT-09 | NXT-32 | NXT-95 | NXT-225 | NXT-630 |
|---|---|---|---|---|---|
| Rated Operational Current (Ie) | 9A | 32A | 95A | 225A | 630A |
| Poles | 3P | 3P | 3P | 3P | 3P |
| Rated Operational Voltage (Ue) | 400V AC | 400V AC | 400V AC | 400V AC | 400V AC |
| Coil Voltage Options | 24/110/220/380V AC | 24/110/220/380V AC | 24/110/220/380V AC | 24/110/220/380V AC | 24/110/220/380V AC |
| Auxiliary Contacts | 1NO+1NC | 1NO+1NC | 1NO+1NC | 1NO+1NC | 1NO+1NC |
| Mounting Type | DIN Rail | DIN Rail | DIN Rail / Screw | Screw | Screw |
| Mechanical Life | ≥10M cycles | ≥10M cycles | ≥10M cycles | ≥5M cycles | ≥3M cycles |
| Compliance | IEC 60947-4-1 | IEC 60947-4-1 | IEC 60947-4-1 | IEC 60947-4-1 | IEC 60947-4-1 |
4. Working Principle
The NXT series AC contactor operates using electromagnetic control to switch high-current AC circuits:
- Coil Energization: When AC voltage is applied to the coil, it generates a magnetic field that pulls the moving core, closing the main contacts.
- Circuit Closure: The main contacts close, allowing current to flow through the load circuit (e.g., a motor or heating element).
- Auxiliary Contact Operation: The built-in auxiliary contacts switch simultaneously, providing status feedback to control circuits or PLCs.
- De-Energization: When coil power is removed, the magnetic field collapses, and the main contacts open, disconnecting the load circuit.
5. Applications
- Motor Control: Direct-on-line (DOL) starters for small to large motors, pumps, fans, and conveyors.
- Industrial Automation: Control panels, PLC systems, and automation equipment.
- HVAC Systems: Heating, ventilation, and air conditioning equipment control circuits.
- Lighting & Power Distribution: Commercial and industrial lighting control, power distribution panels.
- Heavy Machinery: Industrial machinery, compressors, and other high-power equipment control.
6. Installation & Operation Instructions
- Mounting:
- Compact models (≤95A): Snap onto a standard 35mm DIN rail.
- Larger models (≥115A): Secure to a flat surface using the screw mounting holes.
- Wiring:
- Connect the main power terminals (L1/L2/L3) to the incoming power supply.
- Connect the load terminals (T1/T2/T3) to the motor or load circuit.
- Connect the coil terminals to the specified control voltage (e.g., 220V AC).
- Wire the auxiliary contacts (NO/NC) to control circuits or PLC inputs as needed.
- Operation:
- Apply control voltage to the coil to energize the contactor and close the main contacts.
- Remove control voltage to de-energize the contactor and open the main contacts.
- Safety Notes:
- Disconnect power before wiring or servicing the contactor.
- Ensure the coil voltage matches the contactor’s specifications to avoid damage.
7. Frequently Asked Questions (FAQ)
Q1: How do I choose the right contactor rating?
Select the rating based on the load’s continuous current, with a 20-30% safety margin. For motor applications, use the AC-3 rating to ensure reliable starting and stopping under load.
Q2: What coil voltage should I choose?
Select the coil voltage to match your control system’s power supply:
- 24V AC: Common in industrial PLC systems.
- 220V AC: Standard for most commercial and residential control circuits.
- 380V AC: Used in three-phase industrial control systems.
Q3: What is the difference between AC-1 and AC-3 ratings?
- AC-1: For resistive loads (e.g., heating elements, lighting).
- AC-3: For motor control (e.g., starting and stopping induction motors under load).
All NXT models are rated for both categories, making them versatile for different applications.
Q4: What do the auxiliary contacts do?
The 1NO + 1NC auxiliary contacts are used for status feedback (e.g., to a PLC) or control circuit interlocking. The NO contact closes when the contactor is energized, while the NC contact opens.
Q5: Can I use these contactors with thermal overload relays?
Yes, the NXT series is commonly used in combination with thermal overload relays to form complete motor starter circuits.
Q6: Is the NXT series CE certified?
Yes, all models comply with IEC 60947-4-1 standards and carry the CE mark for compliance with international safety requirements.
8. Technical Documents & Support
Download the full datasheet for detailed specifications, wiring diagrams, and trip coordination guidelines.
Contact our engineering team for custom configurations, communication module integration, or OEM solutions for large-scale projects.
Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
1. Product Overview
The NXT Series AC Contactor is a versatile, high-performance line of 3-pole magnetic contactors engineered for low-voltage AC power distribution and motor control systems. Available in a wide range of ratings from 9A to 630A, these contactors provide reliable switching for motors, lighting, heating, and other low-to-high power loads.
Built with high-quality silver alloy contacts and a robust magnetic system, the NXT series offers long mechanical and electrical life. All models include built-in auxiliary contacts (1NO+1NC) for status feedback and control circuit integration. Compact models use DIN rail mounting, while larger models feature screw mounting for stability. The NXT series is the ideal choice for industrial automation, HVAC systems, commercial power distribution, and heavy machinery applications.
2. Key Features
- Wide Current Range: Available in ratings from 9A, 12A, 18A, 25A, 32A, 40A, 50A, 65A, 80A, 95A, 115A, 150A, 185A, 225A, 265A, 330A, 400A, 500A to 630A.
- Multiple Coil Voltages: Compatible with 24V, 110V, 220V, and 380V AC coil options to match common control system voltages.
- Built-in Auxiliary Contacts: Standard 1NO + 1NC auxiliary contacts for control circuit integration and status feedback.
- High-Quality Silver Alloy Contacts: Low-resistance contacts minimize power loss and extend electrical life.
- Flexible Mounting: DIN rail mount for compact models (≤95A) and screw mount for larger models.
- Robust Magnetic System: Efficient coil design ensures reliable pull-in and release, even at low voltage.
- Dual Rating Capability: Suitable for both AC-3 (motor control) and AC-1 (resistive load) applications.
- IEC Certified: Compliant with IEC 60947-4-1 standards for safety and reliability.
3. Technical Specifications
| Parameter | NXT-09 | NXT-32 | NXT-95 | NXT-225 | NXT-630 |
|---|---|---|---|---|---|
| Rated Operational Current (Ie) | 9A | 32A | 95A | 225A | 630A |
| Poles | 3P | 3P | 3P | 3P | 3P |
| Rated Operational Voltage (Ue) | 400V AC | 400V AC | 400V AC | 400V AC | 400V AC |
| Coil Voltage Options | 24/110/220/380V AC | 24/110/220/380V AC | 24/110/220/380V AC | 24/110/220/380V AC | 24/110/220/380V AC |
| Auxiliary Contacts | 1NO+1NC | 1NO+1NC | 1NO+1NC | 1NO+1NC | 1NO+1NC |
| Mounting Type | DIN Rail | DIN Rail | DIN Rail / Screw | Screw | Screw |
| Mechanical Life | ≥10M cycles | ≥10M cycles | ≥10M cycles | ≥5M cycles | ≥3M cycles |
| Compliance | IEC 60947-4-1 | IEC 60947-4-1 | IEC 60947-4-1 | IEC 60947-4-1 | IEC 60947-4-1 |
4. Working Principle
The NXT series AC contactor operates using electromagnetic control to switch high-current AC circuits:
- Coil Energization: When AC voltage is applied to the coil, it generates a magnetic field that pulls the moving core, closing the main contacts.
- Circuit Closure: The main contacts close, allowing current to flow through the load circuit (e.g., a motor or heating element).
- Auxiliary Contact Operation: The built-in auxiliary contacts switch simultaneously, providing status feedback to control circuits or PLCs.
- De-Energization: When coil power is removed, the magnetic field collapses, and the main contacts open, disconnecting the load circuit.
5. Applications
- Motor Control: Direct-on-line (DOL) starters for small to large motors, pumps, fans, and conveyors.
- Industrial Automation: Control panels, PLC systems, and automation equipment.
- HVAC Systems: Heating, ventilation, and air conditioning equipment control circuits.
- Lighting & Power Distribution: Commercial and industrial lighting control, power distribution panels.
- Heavy Machinery: Industrial machinery, compressors, and other high-power equipment control.
6. Installation & Operation Instructions
- Mounting:
- Compact models (≤95A): Snap onto a standard 35mm DIN rail.
- Larger models (≥115A): Secure to a flat surface using the screw mounting holes.
- Wiring:
- Connect the main power terminals (L1/L2/L3) to the incoming power supply.
- Connect the load terminals (T1/T2/T3) to the motor or load circuit.
- Connect the coil terminals to the specified control voltage (e.g., 220V AC).
- Wire the auxiliary contacts (NO/NC) to control circuits or PLC inputs as needed.
- Operation:
- Apply control voltage to the coil to energize the contactor and close the main contacts.
- Remove control voltage to de-energize the contactor and open the main contacts.
- Safety Notes:
- Disconnect power before wiring or servicing the contactor.
- Ensure the coil voltage matches the contactor’s specifications to avoid damage.
7. Frequently Asked Questions (FAQ)
Q1: How do I choose the right contactor rating?
Select the rating based on the load’s continuous current, with a 20-30% safety margin. For motor applications, use the AC-3 rating to ensure reliable starting and stopping under load.
Q2: What coil voltage should I choose?
Select the coil voltage to match your control system’s power supply:
- 24V AC: Common in industrial PLC systems.
- 220V AC: Standard for most commercial and residential control circuits.
- 380V AC: Used in three-phase industrial control systems.
Q3: What is the difference between AC-1 and AC-3 ratings?
- AC-1: For resistive loads (e.g., heating elements, lighting).
- AC-3: For motor control (e.g., starting and stopping induction motors under load).
All NXT models are rated for both categories, making them versatile for different applications.
Q4: What do the auxiliary contacts do?
The 1NO + 1NC auxiliary contacts are used for status feedback (e.g., to a PLC) or control circuit interlocking. The NO contact closes when the contactor is energized, while the NC contact opens.
Q5: Can I use these contactors with thermal overload relays?
Yes, the NXT series is commonly used in combination with thermal overload relays to form complete motor starter circuits.
Q6: Is the NXT series CE certified?
Yes, all models comply with IEC 60947-4-1 standards and carry the CE mark for compliance with international safety requirements.
8. Technical Documents & Support
Download the full datasheet for detailed specifications, wiring diagrams, and trip coordination guidelines.
Contact our engineering team for custom configurations, communication module integration, or OEM solutions for large-scale projects.
Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
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