BCW71

Overview

The BCW71 is an NPN epitaxial silicon general-purpose transistor manufactured by onsemi. It features a collector-emitter voltage rating of 45 V and a maximum DC collector current of 0.1 A. The device is housed in a SOT-23 surface-mount package, measuring 2.92 mm in length and 0.93 mm in height. It operates within a temperature range of -55°C to +150°C and exhibits a collector-emitter saturation voltage of 0.55 V.

Feature Summary

• Epitaxial silicon construction for reliable switching performance
• Compact SOT-23 surface-mount footprint for space-constrained designs
• High junction temperature capability up to 150°C

Applications

• General purpose small signal amplification
• Low-level audio amplifier circuits
• Electronic switching applications

Procurement Notes

Verify the specific manufacturer origin, as the BCW71 part number is utilized by multiple semiconductor vendors including NXP, Samsung, and Central Semiconductor. Confirm that the selected component matches the required electrical specifications and package dimensions for your design. Ensure compliance with RoHS directives if applicable to your project requirements before finalizing procurement.

Selection Notes

Select this component for low-power NPN switching or amplification tasks requiring a compact form factor. The 45 V breakdown voltage and 100 mA current capacity suit standard logic interface and sensor driving roles. Consider thermal management constraints due to the small SOT-23 package when designing for continuous operation near maximum ratings.

Part Context

This component belongs to the category of bipolar junction transistors (BJTs) designed for general-purpose use. It serves as a fundamental discrete semiconductor device for analog and digital circuit implementations. The NPN configuration provides standard current amplification capabilities suitable for a wide range of consumer and industrial electronic systems.

Replacement Considerations

Compatible substitutes include BCW71 variants from NXP Semiconductors, Samsung Semiconductor, Fairchild Semiconductor, and Central Semiconductor. Verify pinout compatibility and exact electrical parameter tolerances when cross-referencing datasheets from different manufacturers to ensure functional equivalence.