ERJ-12ZYJ474U Series

series introduction

# Introduction to the ERJ - 12ZYJ474U Product Series

## 1. Overview
The ERJ - 12ZYJ474U product series represents a cutting - edge line of electronic components that have been engineered to meet the diverse and demanding requirements of modern electronic circuits. These components are designed with precision and high - quality materials, ensuring reliable performance in a wide range of applications.

## 2. Key Features

### 2.1 Resistance Value
The "474" in the model number indicates a specific resistance value. Using the standard resistor coding system, 474 translates to a resistance of 470,000 ohms or 470 kΩ. This precise resistance value is crucial for applications where accurate voltage division, current limiting, or signal attenuation is required.

### 2.2 High Precision
The ERJ - 12ZYJ474U series offers high precision in its resistance values. With tight tolerance levels, typically within a few percent (e.g., ±1% or ±0.5%), these resistors ensure that the electrical characteristics of the circuit remain stable and predictable. This precision is essential in applications such as precision measurement equipment, audio amplifiers, and sensor circuits, where even small variations in resistance can lead to significant errors.

### 2.3 Low Temperature Coefficient
These resistors have a low temperature coefficient of resistance (TCR). A low TCR means that the resistance value of the resistor changes very little with temperature variations. This property is vital in environments where the temperature can fluctuate, such as in automotive electronics, industrial control systems, and outdoor electronic devices. By maintaining a stable resistance over a wide temperature range, the ERJ - 12ZYJ474U series helps to ensure the consistent performance of the overall circuit.

### 2.4 Power Rating
The series is designed to handle a specific power rating. This power rating determines the maximum amount of power that the resistor can dissipate without overheating or suffering damage. The appropriate power rating selection is crucial to ensure the long - term reliability of the resistor in the circuit. For the ERJ - 12ZYJ474U, the power rating is carefully engineered to meet the requirements of various applications, from low - power consumer electronics to more power - hungry industrial applications.

### 2.5 Compact Size
The ERJ - 12ZYJ474U resistors are available in a compact form factor. Their small size makes them ideal for use in printed circuit boards (PCBs) where space is at a premium. This is particularly important in modern electronic devices, such as smartphones, tablets, and wearables, where miniaturization is a key design consideration.

## 3. Construction and Materials

### 3.1 Resistive Element
The resistive element of the ERJ - 12ZYJ474U series is made from high - quality materials, such as metal film or thick film. Metal film resistors offer excellent stability, low noise, and high precision, making them suitable for applications that require high - performance resistors. Thick film resistors, on the other hand, are more cost - effective and can handle higher power levels in some cases.

### 3.2 Terminations
The terminations of the resistors are designed to provide good electrical contact and mechanical stability. They are typically made of materials such as tin - plated copper, which offers low resistance and good solderability. This ensures reliable connections on the PCB and helps to prevent issues such as open circuits or intermittent connections.

### 3.3 Encapsulation
The resistors are encapsulated in a protective material to shield them from environmental factors such as moisture, dust, and mechanical stress. The encapsulation material is chosen for its durability and electrical insulation properties, ensuring

Images for reference

ERJ-2010 Pkg

5% Thick Film Chip

Datasheets

Partlist

ERJ-12ZYJ474U