RN779FFHT106

RF Diode Overview

The RN779FFHT106 is a silicon PIN diode manufactured by ROHM Semiconductor, designed for high-frequency switching applications. It features a series connection configuration within an ultra-small UMD3 (SC-70/SOT-323) surface-mount package measuring 2.1x2.0 mm with a thickness of 1.0 mm. Key electrical specifications include a maximum reverse voltage (VR) of 50 V and a forward current (IF) rating of 50 mA. The device exhibits a low junction capacitance (CT) of 0.9 pF at 35 V reverse bias and a low RF resistance (rF) of 7 Ohms at 100 MHz with 10 mA forward current. It operates within a temperature range of -55°C to +150°C.

RF Diode Feature Summary

• Ultra-small plastic molded package (UMD3) suitable for space-constrained designs
• Low junction capacitance and low RF resistance optimized for high-frequency operation
• High reliability construction supporting automotive-grade requirements

RF Diode Applications

• Automatic gain control circuits
• Antenna amplifiers
• Attenuators

RF Diode Procurement Notes

Verify the specific suffix 'FH' against official ROHM documentation to confirm package type and tape-and-reel specifications. Confirm end-of-life status as some variants indicate obsolescence. Ensure RoHS compliance matches project requirements. Cross-reference the exact part number with authorized distributors to avoid counterfeit components.

RF Diode Selection Notes

Select this component when low capacitance and low RF resistance are critical for signal integrity in high-frequency paths. The 50V reverse voltage rating suits moderate voltage switching environments. Consider the SC-70 footprint constraints during PCB layout. Verify thermal management capabilities given the small package size and 150°C maximum junction temperature limit.

RF Diode Part Context

This part belongs to the RN779F family of PIN diodes from ROHM Semiconductor. Variants such as RN779F_16 and RN779FT106 share similar core electrical characteristics but may differ in packaging or tape-and-reel configurations. The RN789FMFH is a related higher-voltage (100V) variant in the same series, offering increased reverse voltage tolerance while maintaining similar package dimensions.

RF Diode Replacement Considerations

Direct substitutes include other ROHM PIN diodes in the SC-70 package with comparable VR and CT ratings. Check for equivalent RF resistance values at target frequencies. Verify pinout compatibility if replacing in existing layouts. No cross-manufacturer equivalents are confirmed in public data.