MMBD701

RF Diode Overview

The MMBD701 is a Schottky barrier rectifier manufactured by Fairchild Semiconductor, belonging to the MBD70 series. It features a single diode configuration housed in an SOT-23 surface-mount package. The device is rated for a maximum repetitive peak reverse voltage of 70V and a maximum average forward rectified current of 200mA. Key electrical characteristics include a low forward voltage drop of approximately 1.05V at 200mA and a maximum reverse leakage current of 25µA at 70V. The component supports a maximum power dissipation of 280mW and operates within a junction temperature range of -55°C to +150°C.

RF Diode Feature Summary

• Schottky barrier construction enables fast switching speeds with minimal recovery charge.
• Low forward voltage drop reduces power loss and heat generation in signal paths.
• SOT-23 surface-mount packaging facilitates automated assembly and space-constrained designs.

RF Diode Applications

• High-frequency RF mixing and detection circuits
• Clamping and protection in digital logic interfaces
• Signal demodulation in communication equipment

RF Diode Procurement Notes

Verify the manufacturer marking on the component body to distinguish between original Fairchild Semiconductor production and subsequent onsemi manufacturing, as the company underwent acquisition. Confirm RoHS compliance status through official datasheets, as legacy stock may differ from current production runs. Ensure the SOT-23 package variant matches the specific footprint requirements of the target PCB design.

RF Diode Selection Notes

Select the MMBD701 when low capacitance and fast switching are critical for high-frequency signal processing. Compare the 200mA current rating against circuit load requirements to prevent thermal overload. Consider the SOT-23 package dimensions for board space optimization relative to through-hole alternatives like the MBD701. Evaluate the 70V reverse voltage rating against peak transient voltages in the application environment.

RF Diode Part Context

The MMBD701 is part of the MBD70 family of Schottky diodes, which also includes through-hole variants such as the MBD701. This series is designed for general-purpose high-speed switching applications. Fairchild Semiconductor originally developed this line before its semiconductor division was acquired by onsemi, leading to shared part numbers across both manufacturers' portfolios.

RF Diode Replacement Considerations

The MBD701 serves as a direct functional equivalent but utilizes a TO-92 through-hole package rather than surface mount. Other SOT-23 Schottky diodes with similar 70V ratings and low capacitance may be substituted if pin compatibility and thermal characteristics align with the design constraints.