2SA1522

Overview

The onsemi 2SA1522 is a single, pre-biased PNP bipolar junction transistor (BJT) designed for through-hole mounting in the 3-SPA package. It features a maximum collector-emitter voltage of 50 V and a continuous collector current rating of 500 mA. The device offers a transition frequency of 250 MHz and a power dissipation capacity of 300 mW. As a pre-biased transistor, it integrates an internal resistor network to simplify circuit design by reducing component count and board space requirements.

Feature Summary

• Integrates internal biasing resistors to streamline circuit implementation
• Provides high-speed switching capabilities with a 250 MHz transition frequency
• Supports moderate current handling up to 500 mA for signal applications

Applications

• General-purpose switching circuits
• Logic level interface drivers
• Small-signal amplification stages

Procurement Notes

Verify the specific ordering suffix to ensure the correct package type and tape/reel configuration match your assembly requirements. Confirm that the thermal resistance parameters align with your system's heat dissipation strategy. Cross-reference the electrical characteristics against your application's voltage and current limits to prevent overstress conditions during operation.

Selection Notes

Choose this component when a compact, pre-biased PNP solution is required for low-to-medium power switching tasks. The integrated resistor network reduces external component count compared to discrete BJT designs. Ensure the 50 V voltage rating exceeds your peak operating voltages and verify that the 300 mW power dissipation limit accommodates your thermal environment without additional heatsinking.

Part Context

This part belongs to onsemi's family of pre-biased bipolar transistors, which combine standard BJT functionality with built-in biasing networks. These devices are engineered to replace multiple discrete components, thereby simplifying schematic design and improving reliability in consumer electronics and industrial control systems where space efficiency is critical.

Replacement Considerations

Direct substitutes include other pre-biased PNP transistors from onsemi such as the 2SB1220 or 2SB1221, provided they meet the 50 V and 500 mA specifications. Verify pinout compatibility and thermal performance before substitution.