P6SMB68AT
Unidirectional TVS diodes for transient voltage suppression, 600W peak power
Manufacturer： ['onsemi', 'rochester', 'littelfuse']
series introduction
# Introduction to the P6SMB68AT Product Series
## 1. Overview
The P6SMB68AT product series belongs to the family of transient voltage suppressors (TVS). These devices are crucial components in modern electronic circuits, designed to safeguard sensitive electronic equipment from voltage spikes and transient events. Voltage spikes can occur due to various reasons such as lightning strikes, electrostatic discharge (ESD), and inductive load switching. The P6SMB68AT series is engineered to quickly and effectively divert these excessive voltages away from the protected circuit, ensuring the reliable and safe operation of the connected electronics.
## 2. Key Features
### 2.1 High Surge Capability
One of the standout features of the P6SMB68AT series is its high surge current handling capacity. It can withstand large transient currents, typically in the range of several amperes, for short durations. This makes it suitable for applications where sudden and intense voltage surges are likely to occur, such as in power distribution systems and industrial control circuits.
### 2.2 Low Clamping Voltage
When a voltage spike is detected, the P6SMB68AT rapidly switches to a low - impedance state. This results in a low clamping voltage, which means that the voltage across the protected circuit is kept at a safe level during the transient event. By limiting the voltage, it prevents damage to the sensitive components in the circuit, such as integrated circuits, transistors, and microcontrollers.
### 2.3 Fast Response Time
The series offers an extremely fast response time, typically in the order of picoseconds. This rapid response ensures that the TVS can react almost instantaneously to voltage transients, providing immediate protection to the circuit. In high - speed electronic systems, where even a brief overvoltage can cause data corruption or component failure, this fast response time is of utmost importance.
### 2.4 Low Leakage Current
Under normal operating conditions, the P6SMB68AT has a very low leakage current. This means that it consumes minimal power when there are no voltage transients, making it an energy - efficient solution for long - term use. Low leakage current also helps to reduce self - heating of the device, which can improve its reliability and lifespan.
## 3. Electrical Specifications
### 3.1 Stand - off Voltage
The stand - off voltage of the P6SMB68AT is typically around 68V. This is the maximum DC or continuous AC voltage that the device can withstand without conducting significant current. It is an important parameter as it determines the normal operating voltage range of the protected circuit.
### 3.2 Breakdown Voltage
The breakdown voltage is the voltage at which the TVS starts to conduct current rapidly. For the P6SMB68AT series, the breakdown voltage is slightly higher than the stand - off voltage, usually in the range of 75 - 82V. Once the breakdown voltage is reached, the device begins to divert the excess current away from the protected circuit.
### 3.3 Clamping Voltage
When a surge current of a specified magnitude (e.g., 10A) flows through the device, the clamping voltage is the maximum voltage that appears across the TVS. For the P6SMB68AT, the clamping voltage is designed to be well below the maximum voltage that the protected components can tolerate, providing effective protection.
### 3.4 Power Dissipation
The power dissipation rating of the P6SMB68AT indicates the amount of power that the device can safely dissipate without overheating. It is typically specified as a certain number of watts (e.g., 600W for a specific package type). This rating is important for determining the device's suitability for different applications based on the expected surge energy
Images for reference
DO-214AA, SMB403C
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