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CHINT NCH8-63_40 AC Contactors
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CHINT NCH8-63_40 AC Contactors

Manufacturer: CHINT
Model: NCH8-63/40 Modular AC Contactor
Rating: 40 A (AC-1 / AC-7a), 18 A (AC-7b)
Coil Voltage: 220/230 VAC 50/60 Hz (common variants: 24 V, 110 V, 240 V)
Poles / Contacts: 4-pole, 4 NO (4 normally open) main contacts
Application: Lighting, heating, resistive loads, household appliances, small motors up to ~9 kW @ 230 V, modular DIN-rail control in residential/commercial panels

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Product Description

The CHINT NCH8-63/40 is a high-quality, cost-effective modular AC contactor from the NCH8 series, designed for silent, reliable switching in AC-1 and AC-7a applications. With a 40 A continuous rating in a compact 3-module (54 mm) DIN-rail width, it is widely used for controlling lighting circuits, electric heating, ventilation, pumps, and other non-inductive or low-inductive loads in residential, commercial, and light industrial installations. Silent operation (no hum), high electrical endurance (up to 50,000 cycles), and full compliance with IEC/EN 61095 make it a popular alternative to brands like Schneider Acti9 iCT or ABB ESB series.

Standard Features

  • 40 A AC-1 rating: Handles resistive loads up to 9 kW @ 230 V / 15 kW @ 400 V — ideal for lighting banks, heaters, and general power distribution.

  • Silent & no hum operation: Special coil design eliminates AC buzzing — perfect for residential and office environments.

  • Compact modular design: 54 mm wide (3 modules), DIN-rail mount — fits standard consumer units and distribution boards.

  • 4 NO contacts (4-pole): Full 4-pole switching for three-phase or multi-circuit control; variants include 2NO+2NC, 3NO+1NC, etc.

  • High endurance & reliability: 10,000+ electrical cycles (AC-1), mechanical life >100,000 cycles — proven in millions of installations worldwide.

  • Wide coil options: Common 220/230 VAC; also available in 24 VAC/DC, 110 V — direct PLC or timer control possible.

Technical Specifications

ParameterValue
TypeModular AC Contactor (4-pole)
Order NumberNCH8-63/40 (4 NO contacts)
Rated Operational Current Ie (AC-1 / AC-7a)40 A
Rated Operational Current Ie (AC-7b)18 A
Rated Voltage Ue230/400 VAC 50/60 Hz
Rated Insulation Voltage Ui500 V
Coil Voltage Us (standard)220/230 VAC 50/60 Hz
Coil Operating RangePick-up: 85–110% Us; Drop-out: 20–75% Us
Main Contacts Configuration4 NO (4-pole normally open)
Utilization CategoryAC-1, AC-7a (resistive/heating); AC-7b (motor)
Electrical Life (AC-1)50,000 cycles
Mechanical Life100,000+ cycles
Connection TypeScrew clamp terminals
Wire Capacity1.5–10 mm² (power); 1–2.5 mm² (control)
Dimensions (W × H × D)54 mm × 85 mm × 66.5 mm (4-pole / 3 modules)
Mounting35 mm DIN-rail
Degree of ProtectionIP20
Operating Temperature–5 °C to +60 °C
Standards & CertificationsIEC/EN 61095, CE, CCC

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