1N5242B

Single Zener Diodes Overview

The Microchip Technology 1N5242B is a 0.5 W glass axial-lead Zener diode in the DO-35 package. It provides a nominal Zener voltage of 12 V with a ±5% tolerance (suffix B). The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 1 µA at 9.1 V. Electrical characteristics include a test current of 20 mA, a maximum Zener impedance of 30 Ohms, and a positive voltage temperature coefficient of +0.077 %/°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features hermetically sealed glass axial-lead construction for durability
• Offers flexible mounting terminals compatible with standard through-hole processes

Single Zener Diodes Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• General-purpose voltage regulation tasks

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required suffix configuration, as variations exist for military screening or surface mount equivalents. Confirm RoHS compliance status if environmental regulations apply to the assembly process. Ensure the ordering documentation specifies the correct tape and reel or bulk packaging requirements for automated handling.

Single Zener Diodes Selection Notes

Select this component when a 12 V Zener voltage with tight 5% tolerance is required for through-hole applications. Consider the thermal resistance and power derating curves if operation exceeds ambient limits. Evaluate the low capacitance characteristics if high-frequency performance is necessary for the circuit design.

Single Zener Diodes Part Context

This component belongs to the 1N5221 through 1N5281B series of 0.5 W Zener diodes manufactured by Microsemi/Microchip. The series covers a wide voltage range from 2.4 V to 200 V. The 1N5242B specifically addresses the 12 V segment of this standardized lineup, utilizing the traditional DO-35 glass package format.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF package. Other manufacturers may offer direct replacements within the same JEDEC numbering system.