RB508FM-40CFHT106

Overview

The RB508FM-40CFHT106 is a Schottky barrier diode designed for automotive applications, complying with AEC-Q101 standards. It features a common cathode configuration in an SOT-323 (UMD3) package. Key electrical parameters include a reverse voltage of 40V and an average rectified forward current of 80mA. The device exhibits ultra-low reverse leakage current, specified at a maximum of 0.000035mA at 30V reverse bias. Forward voltage is rated at a maximum of 0.66V at 40mA. It supports a junction temperature up to 150°C and operates within a storage temperature range of -55°C to 150°C.

Feature Summary

• Ultra-low reverse leakage current suitable for small current rectification
• Automotive-grade reliability compliant with AEC-Q101 standards
• Common cathode configuration in compact surface-mount packaging

Applications

• Small current rectification in automotive electronic circuits
• Power supply sections requiring low leakage characteristics
• General purpose rectification in space-constrained automotive modules

Procurement Notes

Verify the complete part number including the suffix T106 to confirm tape-and-reel packaging quantity of 3000 units. Confirm RoHS compliance status as listed in official documentation. Ensure the sourcing channel provides valid traceability for AEC-Q101 certified automotive components. Check for any specific handling requirements associated with the SOT-323 package during assembly.

Selection Notes

Select this component when designing automotive circuits requiring low forward voltage drop and minimal reverse leakage at low current levels. The SOT-323 package is appropriate for applications with strict space constraints. Ensure the operating environment does not exceed the 150°C junction temperature limit. Consider the 40V reverse voltage rating relative to peak circuit voltages to maintain adequate safety margins.

Part Context

This component belongs to Rohm's lineup of automotive Schottky barrier diodes engineered for high reliability. The RB508FM series is specifically optimized for low reverse current performance, distinguishing it from standard general-purpose diodes. Its AEC-Q101 qualification ensures suitability for demanding automotive environments where consistent performance under thermal stress is critical.

Replacement Considerations

Direct pin-compatible replacements should be verified against official substitution lists. Ensure any alternative maintains the same AEC-Q101 qualification level and SOT-323 package dimensions. Verify that electrical parameters such as reverse voltage and forward current meet or exceed the original specifications.