2SB09490Q

Single Bipolar Transistors Overview

The Panasonic 2SB0949 is a silicon PNP epitaxial planar type darlington power transistor designed for power amplification and switching applications. It features a TO-220F-A1 full-pack package suitable for heat sink mounting with a single screw. The device supports a collector current of -2A and peak current of -4A, with a collector-emitter voltage rating of -60V for the standard variant and -80V for the A variant. Key electrical characteristics include a forward current transfer ratio (hFE) ranging from 1,000 to 10,000 depending on the rank, a transition frequency of 20MHz, and a maximum collector power dissipation of 35W at 25°C case temperature.

Single Bipolar Transistors Feature Summary

• Darlington configuration providing high forward current transfer ratio
• Optimized for high-speed switching performance
• Full-pack package design allowing direct installation to heat sinks using one screw

Single Bipolar Transistors Applications

• Power amplification circuits
• High-speed switching applications
• General electronic equipment such as office and communication devices

Single Bipolar Transistors Procurement Notes

Verify the specific suffix (Q or A) against the required collector-emitter voltage rating (-60V vs -80V). Confirm the hFE rank classification if precise gain thresholds are necessary for the circuit design. Check the manufacturer's official lifecycle status page for maintenance or discontinuation updates before finalizing procurement plans.

Single Bipolar Transistors Selection Notes

Select the 2SB0949A variant when an operating voltage exceeding 60V is required. Ensure the thermal management strategy accounts for the 35W dissipation limit at case temperatures of 25°C. Verify that the base drive current can support the specified saturation conditions for the intended load current.

Single Bipolar Transistors Part Context

This component belongs to the Panasonic 2SB0949 series of silicon PNP darlington transistors. It serves as the complementary pair to the 2SD1275 and 2SD1275A NPN transistors. The series is engineered for general-purpose power amplification and switching tasks within standard electronic equipment frameworks.

Single Bipolar Transistors Replacement Considerations

No public confirmed substitute part numbers are documented in the provided datasheet.