BC559B

Single Bipolar Transistors Overview

The BC559B is a general-purpose PNP bipolar junction transistor (BJT) manufactured by Diotec Semiconductor. It operates with a maximum collector current of 100 mA and features three distinct DC current gain groups: Group A (hFE 120-220), Group B (hFE 200-450), and Group C (hFE 400-800). The device supports a collector-emitter voltage (VCEO) of -30 V, a collector-base voltage (VCBO) of -30 V, and an emitter-base voltage (VEBO) of -5 V. Power dissipation is rated at 500 mW, with a transition frequency (fT) of 150 MHz. It functions within a temperature range of -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• General-purpose design suitable for signal processing, switching, and amplification applications
• Three standardized current gain groups (A, B, C) for precise circuit matching
• Compliant with RoHS, REACH, and Conflict Minerals regulations

Single Bipolar Transistors Applications

• Signal processing circuits
• Electronic switching applications
• Amplifier stages

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix when purchasing. Standard versions are supplied in ammo packs. Suffixes such as -Q indicate AEC-Q101 compliance, while -AQ denotes qualification status. Confirm package type requirements, as bulk packaging may require specific suffixes like BK. Ensure the selected gain group matches the design specifications before finalizing orders.

Single Bipolar Transistors Selection Notes

Select the appropriate hFE group based on required gain tolerance: Group A offers 120-220, Group B provides 200-450, and Group C delivers 400-800. This component serves as the complementary match to NPN transistors like the BC549B. Consider thermal resistance limits and ambient temperature derating curves for power dissipation calculations in enclosed designs.

Single Bipolar Transistors Part Context

The BC559B belongs to the BC556 through BC559 series of universal PNP transistors from Diotec Semiconductor. These devices share identical mechanical dimensions and pinouts but differ in breakdown voltages. The BC559 variant specifically provides a 30 V rating, distinguishing it from higher-voltage siblings like the BC556 or BC557.

Single Bipolar Transistors Replacement Considerations

BC558B

Single Bipolar Transistors FAQ

What are the available DC current gain groups for the BC559B?

The BC559B is available in three current gain groups: Group A (120 to 220), Group B (200 to 450), and Group C (400 to 800).

Does the standard BC559B meet automotive standards?

Standard versions are commercial/industrial grade. Automotive-grade versions are available with the suffix -Q (AEC-Q101 compliant) or -AQ (in AEC-Q101 qualification).

What is the recommended complementary NPN transistor?

The datasheet recommends the BC549B as the complementary NPN transistor for the BC559B.