1N5349B/TR8

Overview

The Microchip Technology 1N5349B/TR8 is a silicon 5-watt Zener diode with a nominal voltage of 12 V and ±5% tolerance. It operates within a temperature range of -65°C to +150°C, featuring a maximum reverse current of 2 µA at 8.6 V and a dynamic impedance of 2.5 Ω at a test current of 100 mA. The component utilizes an axial-lead T-18-2 package and is supplied in tape-and-reel format.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and exhibits minimal voltage change versus current
• Features flexible axial-lead mounting terminals for through-hole integration

Applications

• Voltage regulation circuits requiring 5-watt power dissipation
• High reliability applications utilizing JEDEC registered components
• Industrial equipment operating under extreme thermal conditions

Procurement Notes

Verify the specific suffix configuration against official datasheets to confirm tolerance and packaging details. Confirm RoHS compliance status as it varies by manufacturing lot. Ensure the TR8 designation matches the required tape-and-reel specifications for automated assembly processes before finalizing procurement orders.

Selection Notes

Select this component when a 12 V reference with ±5% precision is required in a 5-watt axial package. Consider the thermal resistance characteristics and derating curves for adequate heat sinking. Verify that the maximum regulator current aligns with the circuit's load requirements and ambient temperature constraints.

Part Context

This part belongs to the 1N5333B through 1N5388B series of JEDEC registered silicon Zener diodes. The series offers voltages from 3.3 V to 200 V in plastic encapsulated axial leads. The 'B' suffix indicates standard voltage tolerances, while the 'TR8' suffix denotes the specific tape-and-reel packaging format.

Replacement Considerations

Equivalent parts include other manufacturers' 1N5349 variants. Verify pinout compatibility and thermal performance. Cross-reference electrical parameters such as dynamic impedance and leakage current to ensure functional equivalence in the target application.