1N3048B-1

Overview

The Microchip Technology 1N3048B-1 is a unidirectional silicon voltage regulator diode housed in a DO-13 through-hole package. It features a nominal Zener voltage of 150 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 2 µA at 114 V, a maximum forward voltage drop of 1.2 V at 200 mA, and a maximum dynamic impedance of 1000 Ohms.

Feature Summary

• Hermetically sealed glass construction suitable for high-reliability environments
• Leadless surface mount equivalents available via specific ordering prefixes
• Metallurgically enhanced contact construction for durability

Applications

• High-density circuit mounting requiring low parasitic effects
• Voltage regulation in military and aerospace systems
• Overvoltage protection circuits

Procurement Notes

Verify the specific screening level required for your application, as equivalent MIL-PRF-19500/115 screening options are available by adding MQ, MX, or MV prefixes to the part number. Confirm RoHS compliance status if necessary, which may require an e3 suffix. Ensure the DO-13 axial lead package matches your board layout constraints before finalizing procurement.

Selection Notes

Select this component when a 150 V regulation point is needed in a ruggedized through-hole format. Consider the 1 W power rating and 175°C junction temperature capability for harsh environments. Evaluate the 1000 Ohm dynamic impedance against circuit stability requirements. Compare against standard JEDEC registered variants if surface mount packaging is preferred instead of the axial lead configuration.

Part Context

This device belongs to the 1N3016 through 1N3051 series of silicon Zener diodes. While the standard JEDEC registration utilizes the DO-13 package, Microchip offers surface mount versions in the DO-213AB outline that maintain similar performance profiles but with a 1.5 W power rating. The 1N3048B-1 specifically represents the axial lead variant within this family.

Replacement Considerations

Equivalent screening levels can be obtained using prefixes such as MX or MV. Surface mount alternatives exist in the DO-213AB package with higher power ratings. Verify pinout compatibility and thermal management requirements when substituting with devices from other manufacturers offering similar 150 V Zener specifications.