BA891,115

RF Diode Overview

The BA891 is a planar high-performance band-switching diode manufactured by NXP Semiconductors. It is housed in an ultra-small SOD523 surface-mount plastic package with two leads. The device features a maximum continuous reverse voltage of 35 V and a continuous forward current rating of 100 mA. Key electrical characteristics include a maximum diode capacitance of 1.05 pF at 1 MHz, a maximum forward resistance of 0.7 Ω at 100 MHz, and a series inductance of 0.6 nH. Total power dissipation is rated at 715 mW at a solder point temperature of 90 °C. The junction temperature range spans from -65 °C to +150 °C.

RF Diode Feature Summary

• Ultra-small plastic SMD package for compact circuit integration
• Low diode capacitance ensuring minimal signal loss
• Low diode forward resistance for efficient switching
• Small series inductance for high-frequency performance

RF Diode Applications

• Low loss band-switching in VHF television tuners
• Surface mount band-switching circuits

RF Diode Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details such as reel or cut tape configuration. Confirm RoHS compliance status through the latest product data sheet. Check current product availability status directly with NXP Semiconductors sales offices, as component lifecycle stages may affect procurement options.

RF Diode Selection Notes

Select the BA891 for applications requiring low capacitance and low inductance in VHF frequency ranges. Ensure the operating conditions remain within the specified limits for reverse voltage, forward current, and power dissipation. Verify that the SOD523 package dimensions are compatible with the target PCB layout and assembly processes.

RF Diode Part Context

The BA891 belongs to the family of band-switching diodes designed for RF and microwave applications. It serves as a critical component for tuning and switching functions in radio frequency circuits. The device utilizes planar technology to achieve consistent performance characteristics across manufacturing batches.

RF Diode Replacement Considerations

Consult the official NXP Semiconductors replacement guide for verified substitute part numbers. Ensure any alternative component matches the SOD523 package outline and meets the required electrical specifications for capacitance, resistance, and voltage ratings.