SI4963DY

Overview

The SI4963DY is a dual P-Channel Power Field-Effect Transistor manufactured by Fairchild Semiconductor. It features a silicon metal-oxide semiconductor construction with an enhancement mode operation. The device is housed in an SOIC-8 surface-mount package and includes two elements with a built-in diode. Key electrical characteristics include a drain-source breakdown voltage of 20V, a maximum continuous drain current of 6.2A, and a maximum on-resistance of 0.033 ohms.

Feature Summary

• Dual P-Channel configuration for efficient power switching applications
• Integrated body diode for synchronous rectification or freewheeling
• Low on-resistance to minimize conduction losses
• Surface-mount SOIC-8 packaging for compact circuit board integration

Applications

• DC-DC converter circuits
• Power management modules
• Load switch implementations

Procurement Notes

Verify the manufacturer origin carefully, as this part number is widely associated with Vishay Siliconix. Confirm that the specific unit received matches the Fairchild Semiconductor branding if required by your supply chain specifications. Ensure the datasheet parameters align with your design requirements before finalizing procurement decisions.

Selection Notes

Select this component when a dual P-channel MOSFET solution is required within a small footprint. The 20V rating and 6.2A current capacity suit low-voltage power distribution tasks. Verify thermal performance under expected load conditions due to the 0.033 ohm resistance value.

Part Context

This component belongs to the broader category of discrete power transistors used in electronic systems. It serves as a fundamental switching element in power electronics, replacing older bipolar technologies with higher efficiency and faster switching capabilities suitable for modern portable and industrial devices.

Replacement Considerations

Cross-reference with SI4963DY-T1-E3 from Vishay for identical electrical specifications. Check pinout compatibility and thermal resistance values when substituting with other dual P-channel MOSFETs in the same package type.