Stable Voltage Diode 1SMA4736A: A Crucial Component in the Electronic World

PublishTime： 2024-06-06 Article Source：SLKOR Official Website

In the intricate realm of electronics, a tiny component often carries a tremendous responsibility. The 1SMA4736A Stable Voltage Diode is precisely such a critical component, serving as the anchor of stability in electronic circuits with its unique performance and reliability.

SLKOR Voltage Regulator Diode 1SMA4736A product photo

I. Overview of the SLKOR Stable Voltage Diode 1SMA4736A
Voltage Regulation Characteristics

Nominal Voltage: 6.8V

Voltage Regulation Range: 6.46V~7.18V

This precise voltage regulation range ensures stable voltage supply to circuits under various operating conditions, providing robust support for the normal operation of circuits.

Slkor Voltage Regulator Diode 1SMA4736A specification

Accuracy and Reliability

Accuracy: ±5%

Reverse Current (I_r): 50μA @ 4V

The combination of high precision voltage regulation and low reverse current enables the 1SMA4736A to perform excellently in circuits, effectively avoiding the impact of voltage fluctuations on circuit performance.

High Efficiency

Power: 1W

Impedance (Z_zt): 3.5Ω

The high power and low impedance design allow the 1SMA4736A to withstand high currents and voltages, providing sustained voltage support to circuits while minimizing the impact on other circuit components.

II. Applications of the SLKOR Stable Voltage Diode 1SMA4736A

Power Management

In power management circuits, the 1SMA4736A serves as a voltage reference source, providing stable voltage references to other circuits. Whether in smartphones, computers, or other electronic devices, it ensures stable power output, laying a solid foundation for the normal operation of devices.

Communication Systems

In communication systems, voltage stability directly affects communication quality. The application of 1SMA4736A effectively prevents device damage caused by excessive voltage, ensuring communication stability and reliability.

Industrial Automation

In industrial automation, the stability of control signals is crucial. By stabilizing control signal voltages, the 1SMA4736A enhances the control accuracy and stability of automation equipment, providing strong support for production efficiency and product quality.

III. Future Prospects of the SLKOR Stable Voltage Diode 1SMA4736A

With the continuous development of electronic technology, the demand for stable voltage diode performance is also increasing. The 1SMA4736A stable voltage diode has gained market recognition for its outstanding performance and wide range of applications. In the future, with the emergence of new materials and processes, we have reason to believe that the 1SMA4736A will continue to play an important role in the electronic world, contributing more to the advancement of electronic technology.

Ⅳ.Why is a voltage regulator diode required to be reverse-biased in a circuit?

There are several reasons why a voltage regulator diode needs to be connected in reverse bias in a circuit, which can be summarized as follows:

Utilization of reverse breakdown characteristics:

The core working principle of a voltage regulator diode is based on the reverse breakdown state of the PN junction. When the reverse voltage is lower than the reverse breakdown voltage, the reverse resistance is high, and the reverse leakage current is minimal. However, when the reverse voltage increases to near the critical value of the reverse breakdown voltage, the reverse current abruptly increases, leading to PN junction breakdown.

At this breakdown point, the reverse resistance decreases to a very small value. Although the current can vary over a wide range, the voltage across the diode remains stable near the breakdown voltage, achieving the voltage regulation function.

Prevention of forward conduction:

The forward conduction voltage of a voltage regulator diode (i.e., the forward voltage at which the diode begins to conduct) is much lower than its reverse breakdown voltage. If the voltage regulator diode is forward-biased in the circuit, it will start conducting at a lower voltage, which is contrary to the design intent and voltage regulation requirements of the diode.

Enhancement of circuit stability:

By reverse-biasing the voltage regulator diode, it ensures that the diode can regulate the voltage and keep the voltage across the load relatively unchanged when the power supply voltage fluctuates. This improves the stability and reliability of the circuit.

Specific parameter support:

Taking the 1SMA4736A or a similar voltage regulator diode as an example, its regulated value (nominal value) is 6.8V, with a regulated range between 6.46V and 7.18V. When the reverse voltage increases within this range, the voltage regulator diode starts operating, providing a stable voltage output.

Additionally, these voltage regulator diodes typically have high power ratings (e.g., 1W) and low impedance (e.g., 3.5Ω), allowing them to withstand high currents and voltages, providing sustained voltage support for the circuit.

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