MPSW3725

Single Bipolar Transistors Overview

The MPSW3725 is a small signal NPN bipolar junction transistor manufactured by Fairchild Semiconductor. It features a maximum collector current of 1.2 A and a collector-emitter breakdown voltage of 40 V. The device has a minimum DC current gain (hFE) of 25. It is housed in a TO-226-3 through-hole package, also known as TO-92, with three terminals. The component is constructed from silicon material and is designed for general-purpose switching and amplification applications.

Single Bipolar Transistors Feature Summary

• NPN polarity configuration for standard circuit integration
• Silicon-based construction for thermal stability
• Through-hole mounting capability via TO-226-3 package

Single Bipolar Transistors Applications

• General-purpose switching circuits
• Amplifier stages
• Driver circuits for low-power loads

Single Bipolar Transistors Procurement Notes

Verify the manufacturer marking on the component body to distinguish between original Fairchild Semiconductor production and subsequent onsemi manufacturing, as corporate ownership changed. Confirm the specific package variant matches the required PCB footprint. Ensure the date code aligns with supply chain requirements. Check for any specific ordering suffixes that may indicate tape-and-reel packaging versus bulk quantities if applicable to the procurement channel.

Single Bipolar Transistors Selection Notes

Select this component when a robust NPN transistor with 1.2 A continuous current handling is required in a through-hole form factor. The 40 V rating suits low-voltage logic and power rails. Consider the thermal dissipation capabilities of the TO-226-3 package for heat management. Compare against alternative NPN transistors with similar hFE ranges and voltage ratings if pin compatibility or sourcing constraints exist.

Single Bipolar Transistors Part Context

The MPSW3725 belongs to the family of small-signal bipolar transistors widely used in consumer electronics and industrial control systems. It serves as a discrete active element for signal processing and power switching. The part number designation follows industry standards for NPN silicon transistors. Its availability spans multiple distributors due to its long-standing use in electronic design.

Single Bipolar Transistors Replacement Considerations

Publicly confirmed substitute part numbers include ZTX450, ZTX690B, and ZTX1051A. Verify electrical parameters such as V(BR)CEO and I(C) match the application requirements before substitution. Pinout compatibility should be confirmed for direct replacement scenarios.