1PS79SB31 Schottky Diode – Fast Switching, Low Forward Voltage

1PS79SB31 is a planar Schottky barrier diode packaged in a SOD523 (SC-79) ultra-small surface-mount device (SMD) plastic package. It is commonly used in high-speed switching and low-loss rectifier circuits.

Get to know 1PS79SB31

Features

• Very low forward voltage
• Guard ring protected
• Ultra small SMD package

Pinning information

• Pin 1：K--cathode
• Pin 2：A--anode 

Absolute Maximum Ratings

Ordering Model and Packaging Instructions

• 1PS79SB31,115 -- Tape/Wire Strip (Commonly Used)
• 1PS79SB31,135 -- Different Tape Spool Specifications
• 1PS79SB31,315 -- Another Tape Packaging Form

Use 1PS79SB31

The difference from traditional diodes

Key points of working principle:

• When a forward voltage is applied, electrons directly pass through the Schottky barrier from one side of the semiconductor and enter the metal layer.
• It does not involve the storage of minority carriers.
• Therefore:
• The forward voltage is low
• The conduction speed is extremely fast

• When reverse biased, the barrier height prevents electrons from passing through.
• There is only a small reverse leakage current.
• It remains in a stable cutoff state within the rated range (≤ 30V)

• There is no carrier storage effect
• There is almost no reverse recovery time
• It is very suitable for high-speed switching circuits

Applications

1. Ultra high-speed switching
2. Voltage clamping
3. Protection circuits
4. Low current rectification
5. Low power consumption applications (e.g. hand-held devices)

FAQ about 1PS79SB31

• Maximum reverse voltage VR = 30V.
• Maximum forward current IF = 200mA.
• Typical forward voltage drop VF ≈ 0.3–0.5V.