MMBD1705

Overview

The onsemi MMBD1705 is a small signal switching diode housed in an SOT-23 package. It features a maximum repetitive reverse voltage of 30 V and an average rectified forward current rating of 50 mA. The device supports a non-repetitive peak forward surge current of 250 mA with a pulse width of 1.0 second. Electrical characteristics include a breakdown voltage of 30 V at 5.0 µA, a maximum reverse current of 50 nA at 20 V, and a total capacitance of 1.0 pF at 0 V and 1.0 MHz. Reverse recovery time ranges from 0.7 to 1.0 ns under specified test conditions.

Feature Summary

• Dual internal diode configuration within a compact surface-mount footprint
• High-speed switching capability defined by sub-nanosecond reverse recovery times
• Low parasitic capacitance suitable for high-frequency signal processing

Applications

• General-purpose signal switching circuits
• Clamping and protection applications in low-voltage systems
• Logic level shifting interfaces

Procurement Notes

Verify the specific manufacturer origin as documentation references Fairchild Semiconductor history. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the ordering suffix matches the required tape-and-reel or cut-bulk packaging format for your assembly line requirements.

Selection Notes

Select this component when a 30 V reverse voltage rating and 50 mA continuous forward current are sufficient for the design. The SOT-23 package offers space efficiency compared to larger through-hole alternatives. Consider the 1.0 pF capacitance limit for high-speed digital lines where signal integrity is critical.

Part Context

This part belongs to the MMBD1700 series, which includes variants like the MMBD1701, 1703, and 1704. These devices share similar electrical profiles but differ in internal connection topologies such as common cathode or series configurations. The series is designed for general-purpose small-signal applications requiring fast switching speeds.

Replacement Considerations

Cross-reference with MMBD1701, MMBD1703, or MMBD1704 if the circuit topology allows for different internal diode arrangements. Verify that substitute parts maintain the same 30 V reverse voltage and 50 mA forward current ratings.