RN739DT146

RF Diode Overview

The RN739DT146 is a high-frequency PIN diode attenuator manufactured by ROHM Semiconductor. It operates within a frequency range of 30 MHz to 3 GHz. Key electrical specifications include a maximum reverse voltage of 50 V, a forward current rating of 50 mA, and a power dissipation capacity of 100 mW. The device features a maximum diode capacitance of 400 fF and a maximum series resistance of 7 Ohms at the maximum forward current. The forward voltage is specified as 1 V, with an operating temperature range extending up to +125 C.

RF Diode Feature Summary

• High-frequency operation capability for RF applications
• Integrated PIN diode structure for signal attenuation
• Compact surface-mount design suitable for space-constrained circuits

RF Diode Applications

• RF signal attenuation in communication systems
• High-frequency switching applications
• Variable gain control circuits

RF Diode Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lot codes and date codes against current production standards. Ensure storage conditions comply with moisture sensitivity levels to prevent degradation. Cross-reference datasheet revisions to guarantee parameter consistency with design requirements before finalizing procurement orders.

RF Diode Selection Notes

Select this component when designing circuits requiring precise RF attenuation between 30 MHz and 3 GHz. Evaluate thermal management needs given the 100 mW power dissipation limit. Consider the 7 Ohm series resistance impact on signal integrity. Ensure the 50 V reverse voltage rating exceeds peak circuit voltages. Verify package compatibility with existing PCB footprints.

RF Diode Part Context

This part belongs to ROHM's high-frequency PIN diode portfolio, designed for RF and microwave applications. It serves as a compact solution for signal control in modern electronic devices. The SMD3/SOT-346 package facilitates automated assembly. As an obsolete lifecycle item, it represents legacy design choices in older RF hardware implementations.

RF Diode Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, alternative sourcing may require checking secondary market suppliers or evaluating newer generation PIN diodes with compatible electrical parameters.