PN5179_D27Z

Overview

The PN5179_D27Z is an NPN RF transistor designed for low noise UHF/VHF amplifiers and high output UHF oscillators. It operates with collector currents between 100 µA and 30 mA in common emitter or base modes. Key electrical parameters include a Collector-Emitter Voltage (VCEO) of 12 V, Collector-Base Voltage (VCBO) of 20 V, and continuous Collector Current (IC) of 50 mA. The device features a transition frequency (fT) ranging from 900 MHz to 2000 MHz at 5.0 mA. Thermal dissipation is rated at 225 mW in the SOT-23 package. Operating junction temperature spans -55°C to +150°C.

Feature Summary

• Optimized for low noise performance in UHF and VHF amplifier applications
• Capable of functioning as a high output oscillator in low frequency drift environments
• Designed for operation in both common emitter and common base configurations

Applications

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

Procurement Notes

Verify that the D27Z suffix corresponds to the specific tape and reel packaging configuration required for automated assembly. Confirm the component origin matches the Fairchild Semiconductor specifications provided in the datasheet, noting any potential manufacturer transitions if sourcing through onsemi channels.

Selection Notes

Select this component when designing circuits requiring an NPN transistor with a minimum fT of 900 MHz and a maximum VCEO of 12 V. Ensure the application current remains within the 100 µA to 30 mA range to maintain optimal noise figure and gain characteristics specified for the device.

Part Context

The PN5179 belongs to the MPS5179/MMBT5179 family of NPN RF transistors. While originally manufactured by Fairchild Semiconductor, the part may be distributed under the onsemi brand following corporate acquisitions. The D27Z suffix specifically denotes the SOT-23 package variant supplied in tape and reel format.

Replacement Considerations

Direct substitutes include the MPS5179 and MMBT5179, which share identical electrical specifications and pinouts. Verify package compatibility and ensure the replacement source provides equivalent thermal resistance values for the SOT-23 form factor.