1N5349B-AP

Overview

The MCC 1N5349B-AP is a 5-watt Zener diode with a nominal voltage of 12V and ±5% tolerance. It operates within a junction temperature range of -55°C to +200°C, featuring a maximum thermal resistance of 15°C/W from junction to lead. The device exhibits a maximum dynamic impedance of 2.5Ω and a reverse current of 2µA at 9.1V. Packaged in DO-15 axial through-hole format, it supports a maximum regulator current of 395mA and withstands surge currents up to 7.5A.

Feature Summary

• Provides stable voltage regulation across a wide operating temperature range
• Features built-in strain relief for mechanical durability
• Utilizes epoxy material meeting UL 94 V-0 flammability ratings

Applications

• Voltage regulation circuits
• Power supply protection
• Overvoltage clamping applications

Procurement Notes

Verify the specific suffix designation against official documentation to confirm packaging type and compliance status. Ensure that the ordering information matches the required tape and reel or ammo pack quantities specified by the manufacturer. Confirm RoHS compliance details and halogen-free availability if applicable to your project requirements before finalizing procurement.

Selection Notes

Select this component based on its 5W power dissipation capability and 12V nominal breakdown voltage. Consider the thermal resistance characteristics and maximum surge current ratings for circuit robustness. Verify that the DO-15 package dimensions fit the intended PCB layout and mounting constraints while ensuring adequate heat sinking for continuous operation.

Part Context

This part belongs to the 1N5338B through 1N5388B series of 5-watt Zener diodes manufactured by Micro Commercial Components. The series covers a voltage range from 5.1V to 200V, offering various tolerance options and packaging configurations including tape and reel, ammo pack, and bulk formats for diverse manufacturing needs.

Replacement Considerations

Consult official datasheets for equivalent parts from other manufacturers. Verify matching electrical parameters such as voltage tolerance, power rating, and package style before substitution.

FAQ

What is the maximum operating junction temperature for pulsed conditions?

The maximum operating junction temperature can reach 200°C under pulsed conditions with low duty cycle or non-repetitive pulses.

How is the maximum regulator current determined for this device?

The maximum regulator current is based on the maximum voltage of a 5% type unit and must not exceed the value of 5 watts divided by the actual Zener voltage.