1SS381,L3F

Overview

The 1SS381,L3F is a silicon epitaxial planar PIN diode designed for Very High Frequency (VHF) tuner band switching applications. Manufactured by Toshiba Semiconductor and Storage, it utilizes an ESC (SOD-523) surface-mount package to minimize parasitic effects. The device features a maximum reverse voltage of 30 V and supports a forward current of 100 mA. Key electrical characteristics include a maximum total capacitance of 1.2 pF and a typical series resistance of 0.6 Ω. It operates within a junction temperature range of -55°C to 125°C, ensuring reliability in high-frequency signal routing environments.

Feature Summary

• Ultra-low total capacitance optimized for minimal signal distortion in VHF circuits
• Low series resistance ensures efficient signal transmission during switching operations
• Compact ESC surface-mount package facilitates automated assembly and space-constrained designs

Applications

• VHF tuner band switching in broadcast receivers
• RF signal routing in communication equipment
• High-frequency antenna switching systems

Procurement Notes

Verify the component authenticity through authorized Toshiba distributors or certified suppliers. Confirm the presence of the L3F suffix indicating tape-and-reel packaging compatibility with standard SMT processes. Ensure compliance with RoHS directives and check for specific lot traceability requirements relevant to your manufacturing quality standards before finalizing procurement orders.

Selection Notes

Select this component when low capacitance and fast switching speeds are critical for VHF frequency applications. Compare the 1.2 pF maximum capacitance against alternative PIN diodes to ensure signal integrity is maintained. Verify that the 30 V reverse voltage rating exceeds the peak RF voltages present in the target circuit to prevent breakdown during operation.

Part Context

The 1SS381 belongs to Toshiba's dedicated line of silicon epitaxial planar PIN diodes engineered specifically for RF switching. Unlike general-purpose rectifiers, this series prioritizes low parasitic capacitance and series resistance to support high-frequency performance. The L3F variant denotes the specific taping configuration used for high-volume surface-mount production lines.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternatives based on matching pinout compatibility, identical ESC package dimensions, and equivalent electrical parameters such as capacitance below 1.2 pF and series resistance near 0.6 Ω.