SBS26H Schottky Barrier Diode for High-Speed Power Switching

ElecSuppliers Part Number GuideAug 22, 2026

SBS26H is a Schottky barrier diode designed for rectification and power-switching applications where low forward voltage and fast switching characteristics are important.

Schottky diodes are widely used in switching power supplies, DC-DC converters, reverse-polarity protection and other low-voltage power circuits because they do not rely on the same charge-storage mechanism as conventional PN-junction rectifiers.

The SBS26H designation should be checked against the exact manufacturer and package before production use, as similar part-number naming can appear across different diode product families.

SBS26H Key Characteristics

The main reason to use a Schottky diode is its low forward-voltage characteristic and fast switching behavior.

Compared with a conventional silicon rectifier, a Schottky diode can reduce the voltage lost during forward conduction. This can be particularly valuable in low-voltage circuits where even a few hundred millivolts represents a significant percentage of the available supply voltage.

The device is intended for applications where efficient rectification and switching are required.

Schottky Barrier Diode Operation

A Schottky diode uses a metal-semiconductor junction rather than a conventional PN junction.

This structure results in a relatively low forward voltage and very fast switching response.

When forward biased, the diode conducts current with comparatively low voltage drop. When the polarity reverses, the device can stop conducting rapidly.

These characteristics make Schottky diodes especially useful in high-frequency switching circuits.

SBS26H in Power Supplies

Schottky diodes are commonly used in switching power supplies as rectification elements.

In a switching converter, the diode may conduct whenever the main switching transistor turns off or when the inductor current needs a path to continue flowing.

Reducing the diode's forward voltage can improve overall converter efficiency.

This becomes increasingly important in low-voltage power supplies, where diode losses can represent a significant portion of total power dissipation.

Fast Switching Performance

Fast switching is another important advantage of Schottky technology.

A conventional PN diode can exhibit reverse-recovery behavior caused by stored charge. This can increase switching losses and generate additional electromagnetic interference in high-frequency circuits.

Schottky diodes generally have much lower reverse-recovery effects.

This makes them suitable for switching converters operating at relatively high frequencies.

However, designers should still consider reverse leakage current and junction capacitance because these parameters can affect high-frequency performance.

SBS26H Applications

SBS26H can be considered for applications such as low-voltage rectification, DC-DC conversion, power-supply protection and switching circuits.

Typical applications for Schottky diodes include:

Switching power supplies

DC-DC converters

Battery-powered equipment

Reverse-polarity protection

Freewheeling circuits

Low-voltage rectifiers

Power-management circuits

The exact application should be determined from the verified voltage, current, package and thermal specifications of the specific SBS26H device.

Low Forward Voltage

Low forward voltage is particularly useful in low-voltage power systems.

For example, when a diode is used in a 5 V power circuit, a significant forward drop can reduce the voltage available to the load and increase heat generation.

A Schottky diode can reduce this loss compared with many conventional silicon rectifiers.

The actual forward voltage varies with current and temperature, so engineers should evaluate the diode under the real operating current rather than using a single nominal value.

Thermal Considerations

Although Schottky diodes generally offer low forward voltage, they still dissipate power during conduction.

The approximate forward conduction loss can be estimated using:

P = VF × IF

where VF is the forward voltage and IF is the forward current.

At higher currents, even a relatively small forward voltage can produce substantial heat.

PCB copper area, airflow and package thermal resistance should therefore be considered when the diode operates continuously at high current.

Reverse Voltage Protection

When using SBS26H in a power circuit, the maximum reverse voltage must be carefully checked.

A Schottky diode can be damaged if the reverse voltage exceeds its rated limit.

This is especially important in switching circuits because inductive components can generate short-duration voltage spikes that may be considerably higher than the nominal supply voltage.

Appropriate snubber, clamp or TVS protection may be required depending on the circuit topology.

SBS26H Package Considerations

The package of a power diode directly affects current capability and heat dissipation.

Before selecting SBS26H for a PCB design, engineers should verify the exact package dimensions and terminal configuration associated with the particular manufacturer part number.

A replacement with similar electrical characteristics but a different package may require PCB modifications.

The package also determines how effectively heat can be transferred from the semiconductor junction into the PCB or an external heatsink.

SBS26H Replacement

When looking for a replacement for SBS26H, engineers should compare the complete electrical specifications.

Important parameters include reverse-voltage rating, average forward current, peak forward current, forward voltage, leakage current, switching characteristics and package.

For switching power supplies, forward voltage and reverse-recovery behavior can have a significant influence on efficiency.

A diode with a higher voltage rating but substantially higher forward voltage may not provide the same system performance.

SBS26H in DC-DC Converters

Schottky diodes are widely used in buck, boost and other switching-converter topologies.

In these circuits, the diode provides a current path during specific portions of the switching cycle.

Its low forward voltage can reduce conduction losses, while fast switching helps minimize losses at higher switching frequencies.

The diode should be selected together with the switching MOSFET, inductor and controller because changing one component can affect the operating conditions of the entire converter.

SBS26H Design Considerations

The correct selection of a Schottky diode requires more than checking the nominal current rating.

Engineers should consider the maximum reverse voltage, continuous current, peak current, forward voltage, leakage current, operating temperature and thermal resistance.

The actual current waveform should also be considered because switching converters often expose the diode to pulsed rather than purely continuous current.

Adequate voltage margin should be provided for transient conditions.

SBS26H for Power Switching

SBS26H is positioned as a Schottky diode for applications where low forward voltage and fast switching are important.

Schottky technology is particularly useful in low-voltage power conversion because reducing diode conduction losses can improve overall efficiency.

For new designs, the exact SBS26H manufacturer's datasheet and electrical specifications should be verified before component selection. For replacement applications, matching voltage rating, current capability, forward voltage, package and switching characteristics is essential.