BAT54S KL4 SOT-23 30V 100mA Dual Schottky Diode

BAT54S KL4 SOT-23 30V 100mA Dual Schottky Diode is a small, fast-switching surface-mount diode suitable for electronic circuits where low forward voltage and quick switching are important. The device uses Schottky barrier technology and comes in the compact SOT-23 3-pin package, making it useful for PCB designs with limited space.

This dual Schottky diode is commonly used in signal switching, voltage clamping, reverse polarity protection, logic-level circuits, power management, and electronic protection applications. Typical BAT54S specifications include a maximum reverse voltage of 30V, low reverse leakage current, low forward voltage, and reverse recovery time around 5ns, depending on the manufacturer.

The KL4 marking is associated with BAT54S in several manufacturer datasheets.

For Bangladeshi electronics students, Arduino/ESP32 developers, embedded-system engineers, PCB designers, repair technicians, and hobbyists, the BAT54S is a useful SMD diode for compact electronic circuits and signal-protection applications.

Features:

• Part Number: BAT54S
• Marking: KL4
• Diode Type: Dual Schottky Barrier Diode
• Configuration: Series-connected diode pair
• Maximum Reverse Voltage: 30V
• Current Rating: 100mA per diode for the specified product variant
• Package: SOT-23 / SOT-23-3
• Mounting: Surface Mount Device, SMD
• Low Forward Voltage
• Fast Switching
• Typical Reverse Recovery Time: 5ns
• Low Reverse Leakage
• Compact PCB footprint
• Suitable for low-voltage electronic circuits

Specifications:

Representative BAT54S datasheets specify 30V reverse voltage, up to 800mV forward voltage under a pulsed 100mA test condition, 2µA reverse current at 25V, and approximately 5ns reverse recovery time.

BAT54S Pin Configuration

The standard BAT54S configuration uses three terminals:

This pin configuration is documented in the Nexperia BAT54S datasheet.