NE685M03-T1-A

Overview

The NE685M03-T1-A is an NPN silicon RF transistor manufactured by CEL, designed for low noise and high gain applications. It utilizes the M03 surface-mount package with a height of 0.59 mm. Key electrical parameters include a gain bandwidth product (fT) of 12 GHz at VCE = 3 V and IC = 10 mA. The noise figure (NF) is typically 1.5 dB at 2 GHz under VCE = 3 V and IC = 3 mA conditions. Insertion power gain reaches up to 9 dB at 2 GHz. Absolute maximum ratings specify a collector-to-emitter voltage (VCEO) of 5 V, collector current (IC) of 30 mA, and total power dissipation of 125 mW.

Feature Summary

• Utilizes the M03 package featuring a flat lead style and low profile for improved RF performance in portable wireless designs.
• Engineered for very low voltage and low current operation suitable for cellular radio and portable communications.
• Provides high gain bandwidth and low noise figure characteristics optimized for RF signal amplification.

Applications

• Portable wireless communications systems
• Cellular radio applications
• Low voltage/low current RF circuit designs

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status via the -A suffix designation. Ensure storage and handling procedures adhere to electrostatic discharge precautions. Review absolute maximum ratings prior to implementation to prevent permanent damage during operation.

Selection Notes

Select this component for designs requiring minimal footprint and low profile constraints. Evaluate biasing requirements against the 5 V collector-to-emitter voltage limit. Consider thermal management capabilities given the 125 mW power dissipation rating. Verify frequency response alignment with the 12 GHz gain bandwidth specification.

Part Context

This device belongs to the NEC/CEL NE685 series of RF bipolar transistors. It represents an evolution in small outline packages, specifically the M03 configuration. The part serves as a specialized solution for high-frequency applications where space efficiency and signal integrity are critical design factors.

Replacement Considerations

Consult official datasheets for direct pin-compatible alternatives within the same manufacturer family. Verify that substitute components match the specific M03 package dimensions and electrical characteristics before integration into existing circuits.

FAQ

What does the -A suffix indicate on the NE685M03-T1-A?

The -A suffix indicates that the device is Pb-free and compliant with EU RoHS directives.

What is the typical noise figure at 2 GHz?

The typical noise figure is 1.5 dB when measured at VCE = 3 V and IC = 3 mA.

What is the maximum collector current rating?

The absolute maximum collector current (IC) rating is 30 mA.