IC65N 4P D25A

series introduction

# Introduction to the IC65N 4P D25A Product Series

## 1. Overview
The IC65N 4P D25A is a part of a high - performance circuit protection product series designed by Schneider Electric. This particular model is a miniature circuit breaker (MCB) that plays a crucial role in electrical systems, providing reliable protection against overcurrents and short - circuits.

## 2. Key Specifications

### 2.1 Number of Poles (4P)
- The "4P" in the model name indicates that this circuit breaker has four poles. In electrical systems, each pole can be used to control and protect a separate electrical conductor. A 4 - pole breaker is commonly used in three - phase electrical systems with a neutral conductor. It allows for the simultaneous disconnection of all three phases and the neutral in case of a fault, providing comprehensive protection for the entire electrical circuit.

### 2.2 Rated Current (D25A)
- The rated current of 25A means that the circuit breaker is designed to carry a continuous current of 25 amperes under normal operating conditions. This makes it suitable for a wide range of applications where the load current is within this limit. For example, it can be used to protect circuits powering medium - sized electrical equipment such as some industrial machinery, large household appliances, or small commercial lighting systems.
- The "D" characteristic of the circuit breaker refers to its tripping curve. The D - curve is designed for circuits with inductive loads, such as motors. Inductive loads can cause high inrush currents when they start up. The D - curve breaker can tolerate these short - term high inrush currents without tripping, while still providing fast protection in case of a short - circuit or excessive overcurrent.

### 2.3 Breaking Capacity
The IC65N series typically has a high breaking capacity. This means that in the event of a short - circuit, the circuit breaker can safely interrupt the fault current without being damaged. A high breaking capacity is essential in ensuring the safety of the electrical system and preventing damage to equipment and wiring.

## 3. Design and Construction

### 3.1 Compact Design
The IC65N 4P D25A features a compact design, which is beneficial for installations where space is limited. Its small size allows for easy integration into electrical panels, distribution boards, and control cabinets. This makes it a popular choice for both residential and commercial electrical installations.

### 3.2 High - Quality Materials
The circuit breaker is constructed using high - quality materials to ensure long - term reliability and durability. The internal components are made of materials that can withstand high temperatures, mechanical stress, and electrical arcing. The outer casing is also designed to provide protection against environmental factors such as dust and moisture.

## 4. Functionality and Protection Features

### 4.1 Overcurrent Protection
The primary function of the IC65N 4P D25A is to protect the electrical circuit from overcurrents. When the current flowing through the circuit exceeds the rated current of 25A for a certain period, the thermal - magnetic tripping mechanism in the circuit breaker will be activated. The thermal part of the mechanism responds to long - term overcurrents, while the magnetic part responds to short - term high - magnitude overcurrents (short - circuits).

### 4.2 Short - Circuit Protection
In the event of a short - circuit, where the current in the circuit suddenly increases to a very high level, the magnetic tripping element in the circuit breaker will quickly operate. It will cause the contacts of the circuit breaker to open, interrupting the flow of current and preventing damage to the electrical equipment and wiring.

### 4.3 Visual Indicators
The circuit breaker is

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