1N4148UB

Single Diodes Overview

The Microchip Technology 1N4148UB is a small-signal switching diode featuring ceramic body construction for military-grade applications. Qualified per MIL-PRF-19500/116, it offers very low capacitance and fast switching speeds in a surface mount UB package. Key electrical parameters include a working peak reverse voltage of 75 V, an average rectified forward current of 200 mA at 75°C, and a maximum breakdown voltage of 100 V. The device exhibits a reverse recovery time of 5 ns and operates within a junction temperature range of -65 to +200°C.

Single Diodes Feature Summary

• Ceramic bodied construction designed for military grade products
• Very low capacitance with minimal reverse recovery times
• Surface mount UB package configuration

Single Diodes Applications

• High frequency data lines
• RS-232 & RS–422 interface networks
• Ethernet 10 Base T
• LAN
• Computers

Single Diodes Procurement Notes

Verify the specific reliability level required (JAN, JANTX, or JANTXV) as these are distinct qualification levels under MIL-PRF-19500/116. Confirm polarity options such as unidirectional, common anode, or common cathode if applicable to the design. Ensure the ceramic package dimensions align with the PCB layout requirements. Check for RoHS compliance status by design as stated in the documentation.

Single Diodes Selection Notes

Select this component when a robust, low-capacitance switching diode is needed for high-frequency applications. The ceramic construction provides durability suitable for harsh environments. Consider the thermal resistance values for heat dissipation planning. Verify that the 75 V working peak reverse voltage meets the circuit's voltage requirements. Evaluate the 200 mA average rectified current capability against load demands.

Single Diodes Part Context

This part belongs to the 1N4148 series of switching diodes, offering a surface mount equivalent to the popular JEDEC registered 1N4148 number. It is available in various packages including UBC, UB2, DO-35, and DO-213AA. The manufacturer also provides other switching/signal diodes in their portfolio. The UB package is specifically designed for surface mount applications requiring low profile and high reliability.

Single Diodes Replacement Considerations

Check for direct equivalents from other manufacturers that meet MIL-PRF-19500/116 specifications. Verify pinout compatibility for the UB package. Ensure replacement parts offer similar reverse recovery times and capacitance values. Confirm that the alternative components support the required operating temperature range.