1SMB5918BT3
5.1V Zener diodes in SMB package for voltage regulation
Manufacturer： ['rochester', 'onsemi', 'lrc']
series introduction
# Introduction to the 1SMB5918BT3 Product Series
## 1. Overview
The 1SMB5918BT3 product series belongs to the realm of semiconductor components, specifically transient voltage suppressor (TVS) diodes. These diodes play a crucial role in protecting electronic circuits from voltage spikes and transient events, which can otherwise cause significant damage to sensitive electronic components. The 1SMB5918BT3 series is designed to offer reliable and efficient protection in a wide range of applications, ensuring the stability and longevity of electronic systems.
## 2. Key Features
### 2.1 High Surge Capability
One of the standout features of the 1SMB5918BT3 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 well - suited for protecting circuits against sudden voltage surges caused by lightning strikes, electrostatic discharge (ESD), and power supply transients. For example, in an outdoor electronic device, it can effectively absorb the high - energy surges generated during a thunderstorm, preventing them from reaching and damaging the internal circuitry.
### 2.2 Low Clamping Voltage
The series is engineered to have a low clamping voltage. When a voltage surge occurs, the TVS diode quickly switches from a non - conducting state to a conducting state, clamping the voltage across the protected circuit to a safe level. The low clamping voltage of the 1SMB5918BT3 series ensures that the voltage seen by the protected components remains within their safe operating limits, minimizing the risk of damage due to over - voltage.
### 2.3 Fast Response Time
These diodes have an extremely fast response time, typically in the order of picoseconds. This means that they can react almost instantaneously to voltage spikes, providing immediate protection to the circuit. In applications where high - speed data transmission is involved, such as in communication systems, the fast response time ensures that the data integrity is not compromised by voltage transients.
### 2.4 Small Package Size
The 1SMB5918BT3 series comes in a compact package. This small form factor is beneficial for modern electronic designs, where space is often at a premium. It allows for easy integration into printed circuit boards (PCBs) without taking up excessive space, enabling more compact and efficient circuit layouts.
## 3. Electrical Specifications
### 3.1 Reverse Stand - off Voltage (VRWM)
The reverse stand - off voltage is the maximum DC or continuous AC voltage that the TVS diode can withstand in the reverse - biased condition without conducting. For the 1SMB5918BT3 series, the reverse stand - off voltage is typically specified at a certain value (e.g., 15V), which means that the diode will remain non - conducting as long as the reverse voltage across it does not exceed this value.
### 3.2 Breakdown Voltage (VBR)
The breakdown voltage is the voltage at which the TVS diode starts to conduct in the reverse - biased direction. It is slightly higher than the reverse stand - off voltage. When the reverse voltage reaches the breakdown voltage, the diode begins to divert the excess current away from the protected circuit.
### 3.3 Peak Pulse Power Dissipation (PPP)
This specification indicates the maximum power that the TVS diode can dissipate during a transient event. The 1SMB5918BT3 series is rated for a specific peak pulse power dissipation, which determines its ability to handle high - energy surges. A higher peak pulse power dissipation rating means that the diode can handle more severe voltage spikes.
### 3.4 Leakage Current (IR)
Leakage current
Images for reference
DO-214AA, SMB403C
Image Preview
Image Preview