Compact and modular design fits standard distribution boxes.
Quiet operation: No electromagnetic hum during operation.
High-performance insulation materials for enhanced operational safety.
Standard TH35-7.5 DIN Rail mounting for easy installation.
Elegant appearance suitable for visible installations.
IP20 protection against finger contact and solid objects.
Available configurations: 1NO+1NC, 2NO, 4NO (for specified models).
Reliable switching within a wide operating voltage range (85%-110% of rated coil voltage).
Complies with IEC/EN 61095 and IEC 60947-4-1 standards.
Clear mounting instruction diagram appended.
Space Saving: Modular design optimizes space within control panels and enclosures.
Noise Reduction: Silent operation makes it perfect for residential, commercial, and noise-sensitive applications (offices, hospitals).
Enhanced Safety: Superior insulation minimizes electrical risks.
Simplified Installation: DIN rail compatibility and clear diagrams ensure quick and convenient setup.
Application Flexibility: Suitable for a wide range of resistive and low-inductive loads, plus motor loads with derating.
Reliable Performance: Consistent operation even with voltage fluctuations ensures system stability.
Versatile Control: Multiple contact arrangements cater to diverse circuit requirements.
Specification | NCH8-20/11-230V (Code: 256052) |
NCH8-20/20-230V (Code: 256054) |
NCH8-25/40-230V (Code: 256089) |
NCH8-63/11-230V (Code: 256095) |
---|---|---|---|---|
Main Contacts | 1NO + 1NC | 2NO | 4NO | 1NO + 1NC |
Poles | 2P | 2P | 4P | 2P |
Rated Op. Current Ie (AC-1/AC-7a) | 20 A | 20 A | 25 A | 63 A |
Rated Op. Current Ie (AC-3/AC-7b) | 9 A | 9 A | 9 A | 20 A |
Conventional Thermal Current (Ith) | 25 A | 25 A | 25 A | 63 A |
Max Operation Frequency (AC-7b) | 360 cycles/h | 360 cycles/h | 360 cycles/h | 180 cycles/h |
Controlled Power (AC-7a @ 230V) | 4 kW | 4 kW | 5 kW | 12 kW |
Controlled Power (AC-7b @ 230V) | 1.2 kW | 1.2 kW | 1.2 kW | 4 kW |
Controlled Power (AC-7a @ 400V) | 10 kW | 10 kW | 16 kW | 40 kW |
Controlled Power (AC-7b @ 400V) | 4 kW | 4 kW | 4 kW | 11 kW |
Width (D) | 18 mm | 18 mm | 36 mm | 36 mm |
Contactor Rating Group | Screw | Tightening Torque | Wire Area (Rigid/Flexible) | Wire Area (Flexible w/ Ferrule) | Strip Length |
---|---|---|---|---|---|
NCH8-20, NCH8-25 | M3.5 | 0.8 N.m | 1 - 4 mm² | 1 - 2.5 mm² | 10.5 / 12 mm |
NCH8-40, NCH8-63 | M5 | 2.0 N.m | 2.5 - 16 mm² | 2.5 - 6 mm² | 10.5 / 12 mm |
Remote switching and control in residential, commercial, and industrial buildings.
Control of lighting circuits.
Heating, Ventilation, and Air Conditioning (HVAC) systems.
Switching non-inductive loads (AC-1 category).
Control of domestic appliances and similar low-inductive loads (AC-7a category).
Controlling household motor loads like pumps or fans (AC-7b category) - Requires derating.
Use in building automation systems.
Professional Installation: Installation and maintenance must be performed by qualified electrical technicians.
Safety First: Always turn off the power supply before installation, wiring, or maintenance. Avoid touching conductive parts when powered.
Environment: Do not install in environments containing flammable gases, explosive risks, or excessive moisture/condensation.
Short-Circuit Protection: These contactors are not designed to break short-circuit currents. Always use them with a suitable upstream short-circuit protection device (like an MCB).
Motor Loads (AC-7b): When controlling motor loads, ensure you use the specified AC-7b current rating (Ie), which is lower than the AC-7a rating.
Wiring: Use appropriate copper wire sizes and adhere to the specified tightening torques to ensure secure connections.
Mounting: Securely snap onto a standard TH35-7.5 DIN rail.
Maintenance: Perform visual inspections and operational checks (smooth pick-up/release) monthly. Do not disassemble the unit. Replace the contactor if it appears damaged or operates unreliably.