SD0805S040S0R1 Discrete Semiconductor Products

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Diode Type:	Schottky
Voltage - DC Reverse (Vr) (Max):	40V
Current - Average Rectified (Io):	100mA (DC)
Voltage - Forward (Vf) (Max) @ If:	500mV @ 100mA
Speed:	Small Signal =
Current - Reverse Leakage @ Vr:	30µA @ 40V
Capacitance @ Vr, F:	--
Mounting Type:	Surface Mount
Package / Case:	0805 (2012 Metric)
Supplier Device Package:	0805 (2012 Metric)
Operating Temperature - Junction:	-55°C ~ 125°C
Base Part Number:	SD0805S04

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Diodes - Rectifiers - Single: SD0805S040S0R1 application field and working principle

SD0805S040S0R1 is a single rectifier diode with a SOD-323F package and is commonly used in a wide range of applications. It is the second generation of rectifier diodes with the M1 material, adjustable gate resistor structure and low forward voltage. SD08 is a high-speed rectifier diode, which has superior performance in terms of forward current, reverse current, and power dissipation. This type of diode has a high surge capability and highly accurate junction temperature characters.

The SD0805S040S0R1 diode has a maximum peak forward surge current of 40 amperes, a maximum average forward current of 1 ampere, a maximum reverse-voltage of 40 volts, and a maximum device junction temperature of 175°C. Its maximum storage junction temperature is 200°C and it has high stability when exposed to transient vibrations, temperature, and voltage. It also has low internal capacitance and ESR, meaning that it has outstanding low noise and transient performance.

The main application field of the SD0805S040S0R1 is power management. Since it can handle high-current surges in a very efficient way, it is used in power systems to reduce power losses and increase efficiency. Moreover, the low leakage current and low forward voltage drops reduce switching losses, thus increasing the power efficiency. Besides power management applications, the diode is also used in the audio industry, where it finds application in pre-amps and mixers; in radiofrequency applications, especially in power amplifiers; and in automotive applications as reverse bias protection and speed control. Moreover, since its very small size, it is also used in cellular phones and laptops.

The working principle of the SD0805S040S0R1 is based on the P-N junction characteristic. The electrical connection of a P-N junction creates a zone with a higher doping concentration on the n-type side and a zone with a higher doping concentration on the p-type side. When a voltage is applied to the terminals of the diode, a depletion layer (or space charge region) is formed. Therefore, the diode provides a low impedance path in one direction, with current flowing predominantly in one direction, while providing a very high impedance path in the other direction, making current flows not possible. When the anode is at a potential high enough (higher than the forward voltage drop), the reverse current will flow through the diode, otherwise, no current flows.

To sum it up, the SD0805S040S0R1 diode is a single rectifier diode with a SOD-323F package, that is widely used in a range of applications such as power management systems, audio amplifiers, radiofrequency applications, automotive applications, and laptop and cellular phones. Its working principle is based on the P-N junction characteristic, and its maximum peak current, reverse voltage, device junction temperature, and storage temperature are 40 amperes, 40V, 175°C, and 200°C, respectively.

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