UM7502F

RF Diode Overview

The UM7502F is a high-power PIN diode from the UM7500 series manufactured by Microchip Technology. It features a hermetic fused-in-glass construction with a passivated silicon chip designed for RF and microwave applications. The device has a reverse voltage rating of 200V at 0.5 µA leakage current. Key electrical parameters include a typical total capacitance of 1.0 pF at 100V/1MHz, a typical series resistance of 1.0 Ohm at 50mA/100MHz, and a carrier lifetime of 3.5 µs. It operates within a temperature range of -65°C to +175°C.

RF Diode Feature Summary

• Hermetically sealed fused-in-glass construction ensuring voidless and particle-free reliability.
• Low leakage distortion achieved through controlled I-region thickness and high carrier lifetime.
• Metallurgically bonded design providing thermal matching and stable reverse characteristics.
• Capable of meeting MIL-STD-750 screening requirements for military applications.

RF Diode Applications

• RF and microwave switch circuits
• Attenuator circuits
• High-end medical equipment such as MRI systems
• CAT scan equipment

RF Diode Procurement Notes

Verify the specific package style (e.g., Style B or SM) required for the UM7502F, as the datasheet lists multiple mechanical configurations for the UM7500 series. Confirm RoHS compliance status if applicable, noting that standard packaging may differ from RoHS-compliant variants like the UMX7501B. Ensure the ordering suffix matches the desired mounting style and terminal configuration before purchase.

RF Diode Selection Notes

Select the UM7502F when a 200V reverse voltage rating is required for power handling in RF switching applications. Consider the hermetic glass construction for environments requiring high reliability and low leakage. Evaluate the thermal dissipation capabilities based on the chosen package style, as power ratings vary between stud and surface mount options. Verify compatibility with automatic insertion equipment if high-volume assembly is planned.

RF Diode Part Context

The UM7502F belongs to the UM7500 series of power PIN diodes produced by Microchip Technology (formerly Microsemi). This series utilizes advanced silicon wafer bonding and junction passivation techniques to deliver low leakage and stable performance. The family includes variants with different voltage ratings, such as the UM7501 (100V) and UM7504 (400V), sharing similar construction methods and RF properties.

RF Diode Replacement Considerations

Direct substitutes are not explicitly listed in the provided documentation. For RoHS-compliant alternatives, consider the UMX7501B series, though voltage ratings must be verified. Cross-reference with other hermetic PIN diodes offering 200V ratings and similar capacitance/resistance profiles if exact model availability is limited.