El significado de los últimos cuatro dígitos del contactor CHINT AC CJX2

In the model numbers of the Contactor de CA CHINT CJX2 serie, the meaning of the four-digit suffix is mainly related to the rated current and the configuration of auxiliary contacts, and the specific rules are as follows:

1. Decomposition and Meanings of the Four-digit Number

Take the common models CJX2-1210 and CJX2-0901 as examples:

1. The first two digits (como 12, 09)

They represent the rated current of the contactor, with the unit being amperes (A).

– Por ejemplo:

12 indicates that the rated current is 12A (suitable for small and medium-sized loads, such as lighting and small motors);

09 indicates that the rated current is 9A (suitable for low-load scenarios).

Special instructions:

– For some models, there may be “rounding” or approximate values. Por ejemplo, the rated current of CJX2-1810 is 18A, but it may be marked as 17.5A in the actual product manual (it is necessary to refer to the official parameters).

– If the model contains a letter (such as CJX2-1210N), “norte” usually indicates a reversible contactor, but the meaning of the four-digit number remains unchanged.

2. Los dos últimos dígitos (como 10, 01)

They represent the quantity and type of auxiliary contacts, in the format of “number of normally open contacts + number of normally closed contacts”.

– Por ejemplo:

10 indica 1 contacto normalmente abierto (NO) y 0 contactos normalmente cerrados (CAROLINA DEL NORTE);

01 indica 0 normally open contacts and 1 contacto normalmente cerrado;

22 indica 2 normally open contacts and 2 contactos normalmente cerrados (Por ejemplo, in CJX2-4011, the last two digits “11” indicate 1NO + 1CAROLINA DEL NORTE).

Special instructions:

– For some models, the functions may be further distinguished by “letter suffixes”. Por ejemplo, “04” in CJX2-1204N indicates 0 normally open contacts and 4 contactos normalmente cerrados, but this type of model is relatively rare, and it is necessary to confirm in combination with the specific product parameters.

1. Examples of Typical Models and Parameter Correspondences

III. Association between Other Key Parameters and Models

1. Número de polos (Polo)

It is usually not directly reflected in the four-digit number, and it is necessary to confirm through the model suffix or product description.

– Por ejemplo:

CJX2-1210N 220V indicates a 3-pole (3PAG) reversible contactor, suitable for three-phase motor control;

CJX2-6504N indicates a 4-pole (4PAG) contactor, used in special power distribution scenarios.

2. Voltaje de la bobina

The voltage information may be included in the model, but it is necessary to judge in combination with the complete model.

– Por ejemplo:

CJX2-1210 24V indicates that the coil voltage is 24V AC;

CJX2-1801 380V indicates that the coil voltage is 380V AC.

3. Certificaciones y estándares

Certificación CE: Complies with the EN 60947-4-1 estándar (low-voltage switchgear and controlgear);

Certificación CCC: Models sold in China need to pass the China Compulsory Certification.

1. Sugerencias de selección y uso
2. Select the Rated Current According to the Load Current

Principio: The rated current of the contactor ≥ 1.2 veces la corriente de carga (considering the motor starting impact).

Ejemplo: When controlling a 10A motor, CJX2-1210 (12A) should be selected instead of CJX2-0910 (9A).

2. Select the Auxiliary Contacts According to the Control Logic

Contactos normalmente abiertos (NO): Used for signal output (such as start indication);

Contactos normalmente cerrados (CAROLINA DEL NORTE): Used for safety interlocking (such as emergency stop circuits).

3. Pay Attention to Environmental and Installation Requirements

Nivel de protección: Usually IP20 (protección contra el contacto con los dedos), and models with an IP55 or above protection level need to be selected for special scenarios;

Método de instalación: Supports rail installation (35mm estándar), which is convenient for quick replacement.

1. Official Documents and Verification

For further confirmation, you can refer to the CHINT official website or product manuals. Por ejemplo:

– The technical parameters of CJX2-1210 clearly state “rated current 12A, auxiliary contact 1NO”;

– The manual of CJX2-0901 states “9A, 1Contacto auxiliar NC”.

Through the above rules, users can quickly identify the core parameters of the CJX2 contactor to ensure accurate model selection.