2SC3917-AC

Overview

The 2SC3917-AC is a small signal NPN silicon bipolar junction transistor manufactured by onsemi. It features a single-element configuration with built-in bias resistors, designed for switching applications. The device supports a maximum collector current of 0.5 A and a collector-emitter breakdown voltage of 50 V. It utilizes an in-line plastic epoxy package with three through-hole terminals arranged in a single row.

Feature Summary

• Integrated bias resistor network with a fixed ratio of 1
• Designed specifically for high-speed switching operations
• Utilizes silicon epitaxial planar technology

Applications

• General-purpose electronic switching circuits
• Driver stages for low-power loads
• Logic interface buffering

Procurement Notes

Verify the specific suffix AC against official datasheets to confirm pinout and electrical tolerances. Ensure the supplier provides traceable documentation confirming the component originates from onsemi or its authorized manufacturing lines. Cross-reference the part number with RoHS compliance records if environmental regulations apply to the assembly process.

Selection Notes

Select this component when a compact NPN transistor with integrated base resistance is required to simplify circuit design. The 0.5 A current rating suits moderate load switching tasks. Verify that the 50 V breakdown voltage aligns with the system's operating voltage headroom requirements.

Part Context

This transistor belongs to the 2SC3917 series of biased transistors. These devices integrate internal resistors to reduce external component count. The series is commonly used in consumer electronics and industrial control boards where space efficiency and simplified biasing networks are prioritized over discrete resistor solutions.

Replacement Considerations

Direct substitutes include other NPN biased transistors with similar 0.5 A ratings and integrated resistor ratios. Verify pin compatibility and thermal characteristics before substitution.