KA2903DTF

Overview

The KA2903DTF is a dual NPN transistor from Fairchild Semiconductor, housed in an SOT-23 surface-mount package. It features a collector-emitter voltage rating of 50V and a collector current capacity of 100mA. The device offers a DC current gain (hFE) ranging from 100 to 300 at a collector current of 10mA. Designed for general-purpose switching and amplification applications, it operates within a junction temperature range of -55°C to +150°C.

Feature Summary

• Dual NPN configuration in a compact SOT-23 package
• High current gain suitable for amplification tasks
• Robust thermal performance with extended operating temperature range

Applications

• General-purpose switching circuits
• Low-frequency amplification stages
• Driver circuits for small loads

Procurement Notes

Verify the exact suffix 'DTF' against the manufacturer's official datasheet to confirm pinout and electrical specifications. Ensure compatibility with your PCB footprint and thermal management requirements before finalizing procurement decisions.

Selection Notes

Select this component when a dual NPN transistor is required in a small form factor. Consider its 50V voltage rating and 100mA current limit to ensure it meets the circuit's operational demands without exceeding absolute maximum ratings.

Part Context

This part belongs to Fairchild's lineup of small-signal transistors designed for consumer electronics and industrial control systems. The SOT-23 package facilitates automated assembly and space-constrained designs common in modern portable devices.

Replacement Considerations

Consult official substitution guides for equivalents such as the BC847 series or similar dual NPN transistors in SOT-23 packages. Verify that any substitute matches the voltage, current, and gain specifications exactly.