SMBJ30CA-E3/52 Series

series introduction

# Introduction to the SMBJ30CA - E3/52 Product Series

## 1. Overview
The SMBJ30CA - E3/52 belongs to a specialized series of transient voltage suppressor (TVS) diodes. These diodes are engineered to safeguard electronic circuits from the detrimental effects of voltage transients, such as those caused by electrostatic discharge (ESD), inductive load switching, and lightning-induced surges. With their high - performance characteristics, they are an essential component in a wide range of electronic applications.

## 2. Key Features

### 2.1 Voltage and Power Ratings
- **Breakdown Voltage**: The SMBJ30CA - E3/52 has a well - defined breakdown voltage. In this case, the "30" in the part number indicates a nominal breakdown voltage of approximately 30V. This means that when the voltage across the diode exceeds this value, the diode starts to conduct, diverting the excess current away from the protected circuit.
- **Peak Pulse Power Dissipation**: It is capable of handling high peak pulse power. This series is designed to dissipate a significant amount of power during transient events, typically rated at a high - power level (e.g., several kilowatts). This high power - handling capacity ensures that the diode can effectively absorb and dissipate the energy from large voltage spikes without being damaged.

### 2.2 Low Clamping Voltage
During a transient event, the SMBJ30CA - E3/52 quickly switches from a non - conducting to a conducting state. It then maintains a relatively low clamping voltage across its terminals. This low clamping voltage is crucial as it limits the voltage that reaches the protected circuit, preventing damage to sensitive electronic components.

### 2.3 Fast Response Time
One of the most important features of this product series is its extremely fast response time. It can detect and respond to voltage transients in a matter of nanoseconds. This rapid response ensures that the protected circuit is shielded from the full impact of the transient voltage, minimizing the risk of component failure or malfunction.

### 2.4 Low Leakage Current
Under normal operating conditions (i.e., when the voltage across the diode is below the breakdown voltage), the SMBJ30CA - E3/52 has a very low leakage current. This low leakage current helps to reduce power consumption in the circuit and ensures that the diode does not interfere with the normal operation of the protected components.

## 3. Package and Construction

### 3.1 SMB Package
The SMBJ30CA - E3/52 comes in the SMB (Surface Mount SMB) package. This package is a popular choice for surface - mount technology (SMT) applications due to its relatively small size and ease of assembly. The SMB package allows for efficient use of printed circuit board (PCB) space, making it suitable for compact electronic devices.
### 3.2 Construction Materials
The diodes are constructed using high - quality semiconductor materials. The junction is carefully designed and fabricated to ensure reliable performance and long - term stability. The package is also designed to provide good mechanical protection and environmental resistance, protecting the diode from physical damage, moisture, and other external factors.

## 4. Applications

### 4.1 Consumer Electronics
In consumer electronic devices such as smartphones, tablets, and laptops, the SMBJ30CA - E3/52 can be used to protect sensitive integrated circuits (ICs), microcontrollers, and other components from ESD and voltage surges. For example, it can be placed at the input/output ports of these devices to prevent damage caused by static electricity when users connect or disconnect external devices.
### 4.2 Industrial Electronics
Industrial control systems, automation equipment, and power supplies often face harsh electrical environments with the presence

Images for reference

DO-214AC, SMA

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Datasheets

Partlist

SMBJ30CA-E3/52