UM4006SM

RF Diode Overview

The UM4006SM is a silicon PIN diode from the UM4000 series, designed for high-power RF applications. It features a surface-mount (SM) package with an end cap temperature rating of 25°C and a power dissipation capacity of 20 W. The device has a reverse voltage rating of 600 V at 10 uA leakage current. Electrical characteristics include a typical forward voltage of 1.0 V at 100 mA, a maximum series resistance of 0.5 Ω at 100 MHz, and a capacitance of 3 pF at 100 V reverse bias. Carrier lifetime ranges from 5 to 10 µs.

RF Diode Feature Summary

• High charge storage and long carrier lifetime enable control of high RF levels with relatively low bias current.
• Peak RF voltages can be handled well in excess of applied reverse bias voltage.
• Low capacitance and low conductance at zero bias voltage.
• Compatible with automatic insertion equipment.

RF Diode Applications

• Low distortion switches
• Attenuators
• UHF phase shifters
• Megawatt peak-power duplexers

RF Diode Procurement Notes

Verify RoHS compliance status before procurement. Standard UM4000 series devices utilize a Sn/Pb finish. For lead-free requirements, select the UMX prefix variant (e.g., UMX4006SM), which meets EU Directive 2002/95/EC standards and features a matte tin finish. Confirm specific ordering suffixes directly with the manufacturer or authorized distributors to ensure material compliance matches project specifications.

RF Diode Selection Notes

Select the UM4006SM when a surface-mount configuration is required for high-power switching applications. This model provides a 600 V reverse voltage rating suitable for HF through S-band frequencies. Ensure thermal management accounts for the 20 W power dissipation limit at the end cap. Consider the UMX4006SM if environmental regulations mandate lead-free materials.

RF Diode Part Context

The UM4006SM belongs to the UM4000 series of high-power PIN diodes manufactured by Microsemi (now Microchip Technology). These components are characterized by thick I-regions and long carrier lifetimes. While electrically equivalent to the UM4900 series, the UM4000 series typically offers lower power ratings due to differences in the thermal path between the chip and the package.

RF Diode Replacement Considerations

The UMX4006SM serves as the RoHS-compliant alternative to the standard UM4006SM, differing only in plating material (matte tin vs. Sn/Pb). Electrically and mechanically, these parts are interchangeable within the same footprint constraints.