Contacteur Chint NCH8G-40/20

The NCH8G-40/20 contacteur by Chint is a modular contactor specifically designed for residential and small commercial applications. It is suitable for controlling low-inductance or micro-inductance loads (such as household appliances, lighting equipment, etc.). Below is a detailed breakdown of its core information:

Paramètres et fonctions de base

1. Rated Current and Poles

,Courant nominal des contacts principaux,,: 40UN (suitable for AC-7A/AC-7B load types), which can meet the power requirements of most household and small commercial equipment.

,Auxiliary Contact Configuration,,: Le “20” in the model indicates ,,2 normalement ouvert (NON) main contacts,,. It features a no-auxiliary-contact design, resulting in a simple structure and optimized cost.

2. Voltage and Frequency Range

,Tension de bobine,,: Supports 220-230V AC (common residential voltage); a 24V AC version is also available to adapt to specific control systems.

,Operating Voltage Range,,: Applicable to circuits with AC 50/60Hz and rated operating voltage up to 400V.

3. Durée de vie mécanique et électrique

,Durée de vie mécanique,,: Jusqu'à 1,000,000 opérations, assurer un fonctionnement stable à long terme.

,Durée de vie électrique,,: 100,000 opérations, meeting the needs of frequent switching (par ex., in smart home scenarios).

4. Mute and Safety Design

,Operating Noise,,: Ci-dessous 15 decibels (equivalent to the sound of quiet breathing), making it suitable for noise-sensitive environments (such as bedrooms and offices).

,Flame-Retardant Material,,: Adopts thermosetting materials, which are high-temperature resistant and only carbonize (without burning) when exposed to open flames, respecter les normes de sécurité.

1. Installation and Usage
2. Montage sur rail DIN

– Supports quick installation on standard 35mm DIN rails. It can be installed in distribution boxes in combination with miniature circuit breakers, saving space and facilitating maintenance.

,Exigences de câblage,,: For the main circuit, it is recommended to use 2.5-16mm² copper wires to ensure stable current transmission.

2. Scénarios d'application

,Residential Sector,,: Controls air conditioners, chauffe-eau, electric heaters, appareils intelligents pour la maison (such as electric curtains, smart sockets), etc..

,Small Commercial Sector,,: Suitable for lighting control in hotels and apartments, as well as the start-stop control of small motors (such as exhaust fans and water pumps).

III. Price and Market Positioning

1. Prix ​​de référence

– Le 2025 market price is approximately ,,35-50 RMB per unit,, (prices may vary across different channels and promotional activities). It belongs to the mid-to-low-end residential contactor category with outstanding cost-effectiveness.

,Competitors,,: Par rapport à des produits similaires (par ex., Delixi CDCH8S series), it has a similar price but enjoys higher brand recognition.

2. Modèles alternatifs

– For more contacts, consider the ,,NCH8-40/40,, (4 contacts normalement ouverts) ou ,,NCH8-40/22,, (2 normalement ouvert + 2 contacts normalement fermés).

– For industrial scenarios, you can upgrade to the ,,NCH8-M series,, (supports AC-1/AC-7A loads, with an IP20 protection rating).

1. Technical Advantages and Certifications
2. Standard Compliance

– Complies with international standards IEC/EN 61095 and national standard GB/T 17885. It has obtained CE certification, ensuring reliable quality.

2. Design Optimization

,Direct-Acting Inverted Structure,,: Reduces mechanical wear and improves reliability.

,Capacité anti-interférence,,: Suitable for environments with large voltage fluctuations (-5℃ à +40℃).

1. Précautions
2. Correspondance de charge

– Avoid using it for high-inductance loads (such as large motors and welding machines). Si nécessaire, derate the load or use it with a surge suppressor.

2. Protection contre les courts-circuits

– It must be used in conjunction with an appropriate miniature circuit breaker (par ex., Série ChintDZ47) to interrupt short-circuit currents.

Résumé

With its mute operation, long service life, easy installation, et la rentabilité, the Chint NCH8G-40/20 is an ideal choice for residential and small commercial scenarios. For controlling multi-circuit or complex loads, you can expand to other models in the same series. When purchasing, it is recommended to use official channels or authorized distributors to ensure product quality and after-sales support