MV209G

Overview

The MV209G is a silicon epitaxial planar varactor diode manufactured by onsemi, designed for general frequency control and tuning applications. It serves as a solid-state replacement for mechanical tuning methods in electronic circuits. The device operates with a maximum reverse voltage of 30 Vdc and a forward current rating of 200 mAdc. Electrical characteristics include a capacitance range of 26 to 32 pF at 3.0 Vdc and 1.0 MHz, with a typical temperature coefficient of 300 ppm/°C. It is housed in a TO-92 package (Case 182) and supports an operating junction temperature up to +125°C.

Feature Summary

• High Q factor with guaranteed minimum values at VHF frequencies
• Controlled and uniform tuning ratio for consistent performance
• Solid-state reliability replacing mechanical tuning components

Applications

• General frequency control circuits
• Electronic tuning systems
• VHF frequency applications

Procurement Notes

Verify the specific ordering suffix 'G' indicates a lead-free package configuration when sourcing replacements. Confirm that the TO-92 through-hole package matches the target board layout requirements. Ensure the component meets RoHS compliance standards if required by the final assembly specifications.

Selection Notes

Select this component for designs requiring stable capacitance variation over voltage in VHF ranges. Evaluate the 30 Vdc reverse voltage limit against peak circuit voltages. Consider the thermal derating characteristics above 25°C for power dissipation management in enclosed environments.

Part Context

This part belongs to the Silicon Epicap Diodes series from onsemi, intended for robust frequency control tasks. It is functionally equivalent to the MMBV109LT1 but utilizes a different physical package format suitable for through-hole mounting rather than surface mount applications.

Replacement Considerations

The MMBV109LT1 is a direct functional substitute within the same datasheet family, though it uses an SOT-23 surface-mount package instead of the TO-92 form factor.