BC817K-25HR

Overview

The BC817K-25HR is an NPN general-purpose transistor from the Nexperia BC817KH series, housed in a small SOT23 (TO-236AB) Surface-Mounted Device plastic package. It features a collector-emitter voltage of 45 V and a continuous collector current of 500 mA. The device supports high-temperature applications up to 175 °C and offers three current gain selections; the -25H variant provides a DC current gain range of 160 to 400 at VCE = 1 V and IC = 100 mA. Key electrical characteristics include a collector-base breakdown voltage of 50 V, a peak collector current of 1 A for single pulses, and a transition frequency of 100 MHz.

Feature Summary

• High power dissipation capability suitable for demanding thermal environments
• Three distinct current gain selections for precise circuit design flexibility
• Operational stability in high-temperature applications up to 175 °C

Applications

• General-purpose switching circuits
• Signal amplification stages
• Digital logic interface driving

Procurement Notes

Verify the specific ordering suffix against the official Nexperia BC817KH series datasheet to confirm package type and binning. Ensure the procurement channel sources directly from authorized distributors or Nexperia to guarantee component authenticity and traceability. Cross-reference the marking code with the manufacturer's documentation to validate the part number before integration into production lines.

Selection Notes

Select the BC817K-25HR when a moderate DC current gain between 160 and 400 is required for general-purpose NPN switching tasks. Consider this component for designs requiring operation at elevated temperatures up to 175 °C. Evaluate the SOT23 package constraints regarding thermal resistance and PCB footprint dimensions during the layout phase to ensure adequate heat dissipation under maximum load conditions.

Part Context

This component belongs to the BC817KH series of NPN general-purpose transistors manufactured by Nexperia. The series includes variants with different current gain bins (-16H, -25H, -40H) to accommodate various amplification requirements. All members share the same SOT23 physical package and core electrical ratings, differing primarily in their hFE classification ranges.

Replacement Considerations

Direct functional substitutes within the same family include BC817K-16H and BC817K-40H, which share identical packages and voltage/current ratings but offer different DC current gain ranges. Verify that the alternative gain bin meets the specific amplification requirements of the target circuit design.