PN5179_D75Z

Overview

The onsemi PN5179_D75Z is an NPN silicon RF small signal transistor designed for low noise UHF/VHF amplifiers and high output oscillators. It operates with collector currents between 100 µA and 30 mA in common emitter or base configurations. Key electrical parameters include a collector-emitter voltage of 12 V, continuous collector current of 50 mA, and DC current gain (hFE) ranging from 25 to 250 at 3.0 mA. The device exhibits a transition frequency (fT) of 900 MHz to 2000 MHz at 5.0 mA and a noise figure of 5.0 dB at 200 MHz. Thermal dissipation reaches 350 mW in TO-92 packaging.

Feature Summary

• Optimized for low noise performance in UHF and VHF amplifier applications
• Capable of functioning as a high output oscillator with minimal low frequency drift
• Supports operation in both common emitter and common base circuit modes

Applications

• Low noise UHF/VHF amplifiers
• High output UHF oscillators
• RF signal processing circuits

Procurement Notes

Verify the D75Z suffix corresponds to the specific Ammo Pack packaging configuration detailed in the datasheet. Confirm that the component originates from Process 40 manufacturing lines to ensure alignment with specified electrical characteristics. Cross-reference the ordering code against official distributor catalogs to validate authenticity and traceability before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring low noise figures around 200 MHz and high transition frequencies up to 2 GHz. Ensure the operating collector current remains within the 100 µA to 30 mA range for optimal performance. Verify that the 12 V collector-emitter voltage rating accommodates the maximum supply voltages present in the target application environment.

Part Context

This part belongs to the MPS5179 family, which includes equivalent devices such as MMBT5179 and MPS5179. These components share identical electrical specifications and are often interchangeable in designs. The PN5179 designation specifically identifies the through-hole TO-92 variant manufactured by Fairchild Semiconductor, now part of onsemi.

Replacement Considerations

MPS5179 and MMBT5179 are electrically equivalent replacements. Verify pinout compatibility, particularly regarding the collector and emitter orientation differences between TO-92 variants. SOT-23 versions require footprint adaptation but maintain identical electrical performance profiles.