2SD1803S-E

Single Bipolar Transistors Overview

The 2SD1803S-E is a single NPN silicon epitaxial planar bipolar junction transistor manufactured by Sanyo. It is designed for high-current switching applications, featuring a maximum collector current of 5 A and a collector-emitter breakdown voltage of 50 V. The device utilizes a TP-FA surface-mount package (TO-252-3) with an isolated thermal pad. Key electrical characteristics include a transition frequency of 180 MHz and a low collector-emitter saturation voltage of 400 mV at 3 A. The component supports a maximum operating junction temperature of +150°C and has a power dissipation rating of 1 W.

Single Bipolar Transistors Feature Summary

• Optimized for high-current switching operations in relay drivers and converters
• Features low collector-to-emitter saturation voltage to minimize conduction losses
• Provides fast switching speed combined with high transition frequency
• Ensures excellent linearity of DC current gain across operating ranges

Single Bipolar Transistors Applications

• Relay drivers
• High-speed inverters
• DC-DC converters
• General high-current switching circuits

Single Bipolar Transistors Procurement Notes

Verify the specific manufacturer origin, as the 2SD1803 series was originally developed by Sanyo Semicon Device before being acquired by onsemi. Confirm RoHS compliance status and check for End-of-Life notices or Product Change Notifications from the current supplier. Ensure the ordering suffix matches the required tape-and-reel packaging configuration for automated assembly processes.

Single Bipolar Transistors Selection Notes

Select this component when a robust NPN transistor is required for medium-power switching tasks. The TO-252 package offers a balance between thermal performance and board space efficiency. Consider the 50 V voltage rating and 5 A current capacity against circuit demands. Verify that the 1 W power dissipation limit accommodates the expected thermal environment without excessive heatsinking requirements.

Single Bipolar Transistors Part Context

The 2SD1803 belongs to a family of high-current switching transistors introduced by Sanyo Semicon Device. This series includes complementary PNP counterparts such as the 2SB1203. The components are widely recognized for their reliability in industrial and consumer electronics applications requiring efficient power control. The technology represents standard epitaxial planar silicon construction optimized for cost-effective mass production.

Single Bipolar Transistors Replacement Considerations

Public confirmed substitute part numbers: 2SD1803T-TL-H.