RB861Y9HKT2R

Overview

The RB861Y9HKT2R is a detection Schottky diode manufactured by ROHM Semiconductor, currently marked as discontinued and no longer available for new orders. It features a dual-line configuration housed in an EMD4 (SOT-543) surface-mount package with four terminals. Key electrical specifications include a reverse voltage of 5V, a forward current rating of 10mA, and a typical forward voltage of 0.29V at 1mA. The device exhibits a low junction capacitance of 1.1pF at 1V reverse bias, supporting high-frequency detection applications up to 1MHz. It operates within a temperature range of -40°C to +125°C and complies with RoHS standards.

Feature Summary

• Ultra-small footprint design suitable for space-constrained surface-mount layouts
• Low junction capacitance combined with high detection efficiency for signal processing
• Dual-line configuration providing two independent Schottky barriers in a single package

Applications

• High-frequency signal detection circuits
• RF demodulation stages
• Mixed-signal interface protection

Procurement Notes

This component is officially designated as discontinued or end-of-life by the manufacturer. Verification of availability should focus on last-time buy windows or existing distributor stock rather than standard procurement channels. Engineers must confirm the specific ordering suffix matches the required package variant before finalizing any legacy inventory purchases, as supply status may vary by region.

Selection Notes

Designers requiring this specific electrical profile should evaluate alternative components from the same family or newer generations that offer similar voltage and capacitance characteristics. Since the original part is discontinued, substitute selection must prioritize pin compatibility and thermal performance to ensure seamless integration into existing board designs without requiring layout modifications.

Part Context

The RB861Y series belongs to ROHM's lineup of ultra-small Schottky barrier diodes designed for high-speed switching and detection. These devices are engineered to minimize parasitic effects through compact packaging technologies. The specific RB861Y9HKT2R variant represents a tape-and-reel packaged version intended for automated assembly processes in consumer electronics and industrial equipment manufacturing lines.

Replacement Considerations

Public documentation confirms the RB886CM as a recommended replacement with similar specifications, though it utilizes a different VMN2M package and single-diode configuration. Designers must account for the physical footprint change and pinout differences when transitioning to this alternative.