With the rapid development of electronic technology, voltage regulator diodes are playing an increasingly important role in circuit design. Among them, ZM4740A has become the focus of attention for electronic engineers due to its unique performance characteristics. This article will provide a detailed analysis of the various parameters of the ZM4740A and offer practical application guidelines.

Slkor Voltage Regulator Diode product photo

Slkor Voltage Regulator Diode specification

I. Performance Analysis of ZM4740A Voltage Regulator Diode

Regulation Value: The regulation value of ZM4740A is 10V, which means it can stabilize the voltage in the circuit at around 10V under various operating conditions, providing a stable power supply guarantee for the circuit.

Accuracy: ZM4740A has a high accuracy of up to ±5%, making it particularly outstanding in circuits requiring precise voltage control. Whether in power supply circuits, amplifier circuits, or sensor circuits, it can ensure the stability and reliability of the circuit.

Power: The power of ZM4740A is 1W, making it suitable for most electronic device requirements. The moderate power output also helps extend the device's lifespan.

Reverse Current: Before reaching the breakdown voltage, the reverse current of ZM4740A is 10μA@7.6V. This low reverse current characteristic helps reduce circuit power consumption and improve efficiency.

Impedance: The impedance of ZM4740A is 7Ω, enabling it to respond rapidly to current changes in the circuit and maintain stable output voltage.

Parameters of Slkor Voltage Regulator Diode

II. Application Guidelines for ZM4740A Voltage Regulator Diode

Application in Power Supply Circuits: In power supply circuits, ZM4740A can be used as a reference voltage source to provide a stable 10V voltage output for other circuits. By adjusting the parameters in the circuit, precise adjustment of the output voltage can be achieved to meet the different needs of the circuits.

Application in Amplifier Circuits: In amplifier circuits, ZM4740A can be used to stabilize bias voltage or operating point voltage, ensuring the stability and linearity of the amplifier. Stable bias voltage helps improve the performance of the amplifier, reducing distortion and noise.

Application in Sensor Circuits: Sensors typically require a stable reference voltage to improve measurement accuracy. ZM4740A can provide a stable 10V reference voltage for sensors, thereby enhancing measurement accuracy and reliability.

Application in Digital Circuits: In digital circuits, ZM4740A can serve as a voltage regulator to provide a stable power supply voltage for logic gate circuits. Stable power supply voltage helps ensure the correct operation of digital circuits, reducing errors.

III. Considerations for Using ZM4740A

Power Supply Voltage Limitation: Ensure that the input voltage to ZM4740A does not exceed its maximum rated voltage and power to avoid damaging the device.

Heat Dissipation Design: In high-temperature environments, ensure good heat dissipation for ZM4740A to prevent overheating and affecting device performance.

Soldering and Installation: Follow relevant operation specifications during soldering and installation to avoid mechanical or thermal damage to ZM4740A.

Testing and Inspection: Prior to use, test and inspect ZM4740A to ensure its performance meets design requirements.

IV.The voltage that should be applied when the voltage regulator diode is working properly

When a voltage regulator diode is operating normally, the voltage applied to its terminals is usually reverse voltage, and this voltage needs to be sufficiently high to allow the voltage regulator diode to enter the breakdown region and maintain stable reverse voltage. The following is a detailed explanation of the voltage that should be applied to the voltage regulator diode when it is operating normally:

Operating Voltage Range:

The operating voltage of a voltage regulator diode is usually between 5V and 30V, but the specific operating voltage range depends on the model and specifications of the voltage regulator diode. For example, common voltage regulator diode models such as 1N4728A, 1N4733A, and 1N4742A have rated voltages of 3.3V, 5.1V, and 12V, respectively.

Additionally, some voltage regulator diodes have a voltage regulation range of 3.3V to 100V, such as the 1N4728 to 1N4769 series.

Reverse Voltage:

Voltage regulator diodes are typically used as reverse-biased components in circuits. This means that during normal operation, the positive terminal (cathode) of the voltage regulator diode is connected to the circuit's negative terminal (GND), while the negative terminal (anode) is connected to the circuit's positive terminal (VCC).

To make the voltage regulator diode operate normally, sufficient reverse voltage needs to be applied across its terminals so that it enters the breakdown region and maintains stable reverse voltage.

Voltage Stabilization Characteristics:

Voltage regulator diodes have voltage stabilization characteristics, meaning that within a certain range, regardless of the variation in current passing through it, the voltage across its terminals can remain essentially stable.

This stable reverse voltage is called the "stable voltage" (Uz) of the voltage regulator diode and is an important parameter of the voltage regulator diode.

About Slkor：
Slkor has research and development offices in Busan, South Korea, Beijing, China, and Suzhou, China. Most of the wafer manufacturing and packaging and testing are carried out within China. The company employs and collaborates with individuals and organizations worldwide, with a laboratory for product performance and reliability testing and a central warehouse located at its headquarters in Shenzhen. Slkor has filed for over a hundred invention patents, offers more than 2,000 product models, and serves over ten thousand customers globally. Its products are exported to countries and regions including Europe, the Americas, Southeast Asia, and the Middle East, making it one of the rapidly growing semiconductor companies in recent years. With well-established management systems and streamlined workflows, Slkor has rapidly enhanced the brand awareness and reputation of its "SLKOR" brand through its outstanding quality and standardized services. Its product range includes three major series: diodes, transistors, and power devices, with recent introductions of new products such as Hall elements and analog devices, expanding its presence in sensors, Risc-v microcontrollers, and other product categories.