1N5533B/TR

Overview

The Microchip Technology 1N5533B/TR is a low voltage avalanche Zener diode with a nominal breakdown voltage of 13 V at a test current of 1 mA. It features a maximum dynamic impedance of 90 Ohms and a maximum reverse leakage current of 10 µA at 20 V. The device operates within a junction temperature range of -65 °C to +175 °C and dissipates up to 0.5 W. Packaged in an axial-lead DO-35 (DO-204AH) glass enclosure, the TR suffix indicates tape and reel packaging.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range.
• Hermetically sealed glass package construction for environmental protection.
• Low inherent capacitance suitable for high-frequency applications.
• Inherently radiation hard.

Applications

• Voltage reference circuits
• Overvoltage protection
• Voltage clamping

Procurement Notes

Verify that the specific part number matches the required tolerance and packaging configuration. Confirm RoHS compliance status as it varies by grade. Ensure the ordering suffix aligns with the desired metallurgical bond option if military qualification is required. Cross-reference datasheet electrical limits against circuit requirements before finalizing procurement.

Selection Notes

Select this component when a 13 V regulated supply is needed in a through-hole axial package. The B suffix ensures a tighter 5% voltage tolerance compared to standard versions. Consider the 0.5 W power dissipation limit and derating curves for thermal management. Verify compatibility with existing PCB footprint dimensions for the DO-35 package.

Part Context

This device belongs to the 1N5518B through 1N5546B series of 0.5 W axial-leaded glass Zener Voltage Regulators. The series offers voltages from 3.3 V to 33 V with various tolerance options. These components are JEDEC registered and available in commercial, JAN, JANTX, and JANTXV reliability levels depending on the suffix configuration.

Replacement Considerations

Compatible substitutes include other 1N5533 variants such as 1N5533 or 1N5533BUR-1, provided they meet the same 13 V nominal voltage and 500 mW power rating specifications. Verify package compatibility and electrical tolerances before substitution.

FAQ

What does the 'TR' suffix indicate?

The 'TR' suffix indicates that the device is supplied in tape and reel packaging, conforming to EIA-296 standards.

How is polarity identified on the package?

Polarity is indicated by a band on the glass body; the cathode is located at the banded end.