MPS5179_D27Z

Overview

The MPS5179_D27Z 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 modes. Key electrical parameters include a collector-emitter voltage of 12 V, continuous collector current of 50 mA, and a current gain-bandwidth product up to 2000 MHz at 5.0 mA. The device features a minimum DC current gain of 25 and a typical power gain of 15 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 low frequency drift
• Designed for operation in both common emitter and common base configurations

Applications

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

Procurement Notes

Verify the specific suffix D27Z against official documentation to confirm tape and reel packaging details. Ensure the component matches the required TO-92 form factor and lead configuration for your assembly process. Cross-reference datasheet revisions to confirm thermal resistance values and absolute maximum ratings remain consistent with your design constraints.

Selection Notes

Select this component when designing circuits requiring high frequency response up to the UHF band with low noise characteristics. Consider the 12 V collector-emitter voltage limit and 50 mA continuous current rating for biasing networks. Evaluate the thermal dissipation requirements, particularly if operating near the upper limits of the junction temperature range.

Part Context

This part belongs to the MPS5179 family of NPN RF transistors, which includes variants like MMBT5179 and PN5179. These devices are commonly sourced from Process 40 manufacturing lines. The family is characterized by its suitability for general purpose RF amplification and oscillation tasks in consumer and industrial electronics.

Replacement Considerations

Direct substitutes include MMBT5179 and PN5179, which share identical electrical specifications and pinouts. Verify package compatibility, as these parts may be available in SOT-23 or TO-92 formats depending on the manufacturer.