1N4103UR

Single Zener Diodes Overview

The Microchip Technology 1N4103UR is a single Zener diode designed for surface mount applications. It features a nominal Zener voltage of 9.1 V with a tolerance of ±5%. The device operates within a power dissipation rating of 500 mW and exhibits a Zener impedance of 200 Ohms at a test current of 250 uA. It is housed in a DO-213AA (SOD-80) package, measuring 3.7 mm in length and 1.7 mm in diameter. The component supports an operating temperature range from -65 °C to +175 °C and has a voltage temperature coefficient of 0.08 %/°C.

Single Zener Diodes Feature Summary

• Metallurgically bonded glass surface mount construction for enhanced reliability
• Wide operating temperature range suitable for harsh environments
• Low reverse leakage current characteristics

Single Zener Diodes Applications

• Voltage regulation in military and aerospace circuits
• Overvoltage protection in surface mount assemblies
• Reference voltage sources in precision instrumentation

Single Zener Diodes Procurement Notes

Verify the specific suffix (e.g., UR vs. UR-1) against the design specification, as the metallurgical bond option may differ. Confirm RoHS compliance status if required by the assembly process, noting that some variants may not be compliant. Ensure the DO-213AA footprint matches the PCB layout. Cross-reference the manufacturer's latest datasheet for any updates on qualification levels or environmental certifications before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 9.1 V reference is required in a compact surface mount form factor. The DO-213AA package offers a smaller footprint compared to axial equivalents like the 1N4103. Consider the 500 mW power rating for thermal management in dense layouts. The wide temperature range makes it suitable for industrial or defense applications where standard commercial parts would fail. Verify impedance requirements against the circuit load.

Single Zener Diodes Part Context

This part belongs to the 1N4099UR through 1N4135UR series of 0.5 W glass surface mount Zener diodes manufactured by Microsemi (now Microchip). These devices serve as surface mount equivalents to JEDEC registered axial-leaded Zeners. The series provides voltages from 1.8 V to 100 V in standard 5% tolerances. The 1N4103UR specifically addresses the 9.1 V segment of this lineup.

Single Zener Diodes Replacement Considerations

Direct replacements include JAN1N4103UR-1 and JANTXV1N4103UR-1 for qualified versions. Axial equivalents such as 1N4103 are functionally similar but require different mounting techniques. Ensure substitute packages match the DO-213AA dimensions for direct board replacement.