LizCD4148WP Switching Diode Detailed Explanation

Liz CD4148WP Switching Diode Detailed Explanation: Performance Parameters and Application Guide
In high-speed circuit design, a chip component that is only 3.2 millimeters long often determines the response speed and stability of the entire system, and CD4148WP is such an inconspicuous but crucial electronic component.
The Liz CD4148WP is a high-speed switching diode packaged in 1206, featuring a reverse withstand voltage of 75V, an average rectified current of 150mA, and a reverse recovery time of only 4ns.
This diode adopts surface mount technology and is suitable for automated production processes. Its ceramic thick film packaging provides good heat dissipation performance and high and low temperature tolerance.
01 Product Overview and Packaging Features
The LIZ CD4148WP is a small surface mount switch diode, belonging to the high-speed switch diode series produced by LIZ Electronics. This component is packaged in the 1206 standard and measures 3.2 × 1.5 × 0.75 millimeters. Its compact design makes it ideal for high-density circuit board applications.
CD4148WP adopts ribbon packaging method, with each plate containing 5000 components and a minimum order quantity of 50, making it easy for automated assembly production.
It is worth noting that there are CD4148WP models produced by different manufacturers in the market, including Lizhi Electronics and Yongyutai, which have similar basic parameters but may have slight differences.
From a physical structure perspective, the packaging form of CD4148WP ensures that its end strength meets relevant standards, solving the problem of insufficient bending strength in early similar products. This design is suitable for both reflow soldering and wave soldering processes, providing flexibility for production.
02 Detailed explanation of main technical parameters
The core performance of CD4148WP is reflected in its electrical parameters, which determine its performance in circuits.
The reverse withstand voltage capability is an important indicator for evaluating the performance of diodes. The DC reverse withstand voltage (Vr) of CD4148WP reaches 75V, which means it can safely withstand reverse voltages up to 75V without breakdown.
In terms of forward conduction characteristics, when passing a current of 100mA, the forward voltage drop of CD4148WP is 1.25V, which directly affects the efficiency and power consumption of the circuit.
The average rectified current of CD4148WP is 150mA, and the maximum power consumption is 400mW. These parameters define the maximum power range it can handle.
Of particular note is its reverse recovery time of only 4ns, which makes it highly suitable for high-frequency switching applications.
|Parameter Category | Specific Parameters | Numerical/Characteristic | Test Conditions|
|Reverse characteristic | DC reverse withstand voltage (Vr) | 75V|
|Reverse current (Ir) | 5 μ A | Vr=75V|
|Positive characteristic | Positive voltage drop (Vf) | 1.25V | If=100mA|
|Average rectified current (Io) | 150mA|
|Dynamic characteristics | Reverse recovery time (trr) | 4ns|
|Capacitance value | 4pF | Vr=0V, f=1MHz|
|Extreme parameter | Maximum power consumption (Pd) | 400mW|
|Working temperature range | 55 ℃~+150 ℃|
03 Performance advantages and application areas
The performance advantages of CD4148WP make it widely used in multiple electronic fields.
The high-speed switching capability is the most prominent feature of CD4148WP, and thanks to its reverse recovery time of only 4 nanoseconds, this diode is particularly suitable for switching applications in high-frequency circuits. In digital circuits and communication devices, this fast switching capability can significantly improve system response speed.
In power management circuits, CD4148WP is commonly used for functions such as reverse voltage protection, rectification, and voltage clamping. Its 75V reverse withstand voltage and 150mA rectified current enable it to meet the needs of most low-power power supply designs.
CD4148WP is also widely used in signal conditioning circuits, such as peak detection, waveform shaping, and signal limiting. In these applications, the forward characteristics and switching speed of diodes directly affect the accuracy of signal processing.
For high-density circuit board design, the 1206 package size of CD4148WP provides a good balance between space efficiency and soldering reliability. This packaging is both large enough for manual soldering and inspection, and small enough to save valuable PCB space.
Environmental adaptability is also a major advantage of CD4148WP, with a working temperature range covering 55 ℃ to+150 ℃, which can meet the application requirements of harsh environments such as industrial and automotive electronics.
04 Selection reference and usage precautions
Choosing the appropriate diode and using it correctly is a key step in ensuring circuit performance.
In terms of parameter comparison, besides CD4148WP, there are many similar products on the market. Compared to the common 1N4148, CD4148WP provides similar electrical characteristics, but adopts a surface mount form that is more suitable for modern electronic manufacturing.
Application matching requires consideration of multiple factors. For high-frequency switch applications, reverse recovery time is the primary consideration; In power protection circuits, reverse withstand voltage and rectified current are more critical. CD4148WP provides a good balance in these aspects.
Thermal management is an aspect that requires special attention when using CD4148WP. Although its packaging has a certain heat dissipation capability, it is still necessary to ensure appropriate heat dissipation design in high load or high temperature environments to avoid exceeding the maximum operating junction temperature of 150 ℃.
Regarding welding and installation, CD4148WP is suitable for reflow soldering and wave soldering processes. During manual welding, attention should be paid to controlling temperature and time to avoid overheating and damaging the internal structure of the diode.
Finally, when purchasing and replacing, it should be noted that there may be slight differences in CD4148WP produced by different manufacturers. The CD4148WP product number of Lizhi Electronics is C109000, while products of the same model from other manufacturers may have different numbers.
CD4148WP silently performs the duty of signal shaping on digital circuit boards, ensuring that the edges of pulse signals are steep and clear; In the power protection circuit, it is like a loyal guard, using a reverse withstand voltage of 75V to resist the invasion of voltage surges; In the communication module, it ensures high-speed and smooth data flow with a fast switching capability of 4 nanoseconds.
From mobile phone chargers to industrial controllers, from automotive electronics to communication devices, this millimeter level component plays an indispensable role in the modern electronic world with its reliable performance and adaptability.