BFS17W,135

Overview

The BFS17W,135 is a small-signal NPN bipolar junction transistor manufactured by NXP USA Inc. It utilizes the SOT-23 surface-mount package to provide a compact footprint for high-density circuit designs. The device is characterized by low noise and high linearity, making it suitable for amplification tasks in radio frequency and audio applications. Key electrical parameters include a collector-emitter voltage rating of 45 V and a collector current capacity of 100 mA. The component operates with a DC current gain (hFE) ranging from 160 to 320 at a collector current of 2 mA. It features a transition frequency (fT) of 250 MHz at 100 MHz, ensuring effective performance in signal processing circuits requiring moderate bandwidth capabilities.

Feature Summary

• Low noise characteristics optimized for sensitive signal amplification
• High linearity for accurate signal reproduction in analog circuits
• Compact SOT-23 surface-mount package for space-constrained designs

Applications

• RF amplifier stages in communication equipment
• Audio pre-amplification circuits
• General-purpose switching and linear amplification

Procurement Notes

Verify the specific ordering code BFS17W,135 against official NXP documentation to confirm the reel quantity and tape-and-reel packaging specifications. Ensure that the component meets the required RoHS compliance standards for your target market. Cross-reference the manufacturer's latest datasheet revision to confirm pinout compatibility and thermal resistance values before finalizing procurement orders.

Selection Notes

Select this component when a small-signal NPN transistor with low noise performance is required in a limited board area. The SOT-23 package offers a balance between thermal dissipation and size. Consider the hFE range of 160 to 320 for biasing stability in amplifier designs. Evaluate the 250 MHz transition frequency against the operating frequency of the application to ensure adequate gain margins are maintained.

Part Context

The BFS17W belongs to NXP's portfolio of general-purpose small-signal transistors designed for consumer electronics and industrial applications. It serves as a standard replacement for legacy discrete components in modern PCB layouts. The device supports various analog signal processing functions where low distortion and reliable switching are critical. Its widespread availability facilitates integration into mass-produced electronic devices requiring consistent performance across temperature ranges.

Replacement Considerations

Publicly confirmed substitute part numbers for the BFS17W,135 were not identified in the provided reference material. Verify compatibility with alternative manufacturers such as ON Semiconductor or Diodes Inc. by comparing pin configurations, maximum ratings, and electrical characteristics against the original NXP specification sheet.