1N5818 BK PBFREE

Overview

The 1N5818 BK PBFREE is a 30 V, 1 A axial power Schottky rectifier manufactured by Central Semiconductor Corp. Packaged in the DO-41 through-hole format, this silicon device is designed for switch mode power supplies and high-frequency DC to DC converters. It features very small conduction losses, negligible switching losses, extremely fast switching speeds, and a low forward voltage drop. The component also specifies avalanche capability, making it suitable for applications requiring robust performance in low voltage, high frequency inverters, free wheeling circuits, polarity protection, and small battery chargers.

Feature Summary

• Schottky barrier construction providing extremely fast switching and negligible switching losses
• Low forward voltage drop resulting in very small conduction losses
• Specified avalanche capability for enhanced reliability under transient conditions

Applications

• Switch Mode Power Supplies (SMPS)
• High frequency DC to DC converters
• Low voltage, high frequency inverters
• Free wheeling diode applications
• Polarity protection circuits
• Small battery chargers

Procurement Notes

Verify the specific manufacturer source, as the 1N5818 designation is produced by multiple vendors including STMicroelectronics and Daesan. Confirm that the BK suffix corresponds to the desired packaging or marking configuration from Central Semiconductor. Ensure the procurement channel provides official datasheets matching the DO-41 package and electrical specifications to avoid counterfeit or mismatched components.

Selection Notes

Select this component when a through-hole Schottky rectifier with 30 V reverse voltage and 1 A average current rating is required. It is appropriate for designs prioritizing low forward voltage drop and fast switching characteristics over standard PN junction rectifiers. Consider the DO-41 package constraints for PCB layout and thermal management in high-frequency converter topologies.

Part Context

Central Semiconductor Corp manufactures discrete semiconductor products, including diodes and rectifiers. The 1N5818 belongs to the industry-standard 1N58xx series of axial power Schottky rectifiers. This series is widely utilized in general-purpose rectification applications where efficiency and speed are critical. The company offers these devices in various configurations to meet diverse industrial and commercial requirements.

Replacement Considerations

Direct substitutes include the 1N5817 (20 V rating) and 1N5819 (40 V rating) from the same series. Other manufacturers produce equivalent DO-41 Schottky rectifiers with identical 30 V, 1 A ratings. Verify pinout compatibility and thermal characteristics when cross-referencing with alternative brands.