KSC1845ETA

Single Bipolar Transistors Overview

The KSC1845ETA is an NPN epitaxial silicon transistor manufactured by onsemi, designed for audio frequency low-noise amplifier applications. It features a collector-emitter voltage (VCEO) of 120 V and a maximum collector current (IC) of 50 mA. The device offers a DC current gain (hFE) ranging from 300 to 600 at IC = 1 mA and VCE = 6 V. Key electrical parameters include a current gain-bandwidth product (fT) of 50 to 100 MHz and a noise figure (NF) of approximately 7 dB at 1 kHz. Thermal characteristics specify a power dissipation (PD) of 500 mW and a junction-to-ambient thermal resistance of 250 °C/W.

Single Bipolar Transistors Feature Summary

• Designed specifically for audio frequency low-noise amplifier circuits
• Functions as the complementary counterpart to the KSA992 PNP transistor
• Manufactured using lead-free processes compliant with environmental standards

Single Bipolar Transistors Applications

• Audio frequency low-noise amplification stages
• Complementary push-pull output stages utilizing KSA992 pairing
• General-purpose small-signal switching and amplification in consumer electronics

Single Bipolar Transistors Procurement Notes

Verify the specific suffix 'ETA' against the official datasheet ordering information table, as standard listings may reference 'FTA'. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as legacy stock may vary. Ensure the TO-92 package dimensions match the required PCB footprint before finalizing procurement orders.

Single Bipolar Transistors Selection Notes

Select this component when low noise performance is critical in audio signal paths. The high hFE range ensures efficient drive requirements for subsequent stages. Verify that the 120 V breakdown voltage meets the circuit's peak operating conditions. Consider the thermal resistance limits if operating near maximum power dissipation thresholds in enclosed environments.

Single Bipolar Transistors Part Context

This part belongs to the KSC1845 family of NPN epitaxial transistors produced by onsemi. The series is widely recognized for its use in analog audio processing and general-purpose switching applications. The KSC1845ETA variant shares core electrical specifications with other suffixes but differs in packaging or tape-and-reel configuration details defined by the manufacturer.

Single Bipolar Transistors Replacement Considerations

The KSA992 serves as the direct complementary PNP replacement for circuit symmetry. For generic replacements, verify matching VCEO, IC, and hFE specifications. Ensure the substitute device supports similar noise figures if used in low-noise amplifier designs.