1N5533B

Overview

The Microchip Technology 1N5533B is a low voltage avalanche Zener diode rated at 0.5 W, housed in a hermetically sealed axial-lead glass DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 13 V with a standard tolerance of ±5%. The device operates within a junction and storage temperature range of -65°C to +175°C. Key electrical parameters include a maximum Zener impedance of 90 Ohms at a test current of 1 mA, a maximum reverse leakage current of 0.01 µA at 10.5 V, and a forward voltage of 1.1 V at 200 mA.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• Voltage regulation maintained across broad operating currents and temperatures
• Minimal capacitance characteristics suitable for high-frequency applications
• Inherently radiation hard design

Applications

• Voltage regulation over broad operating current ranges
• Reference voltage sources requiring stable breakdown characteristics
• Protection circuits utilizing inherent radiation hardness

Procurement Notes

Verify the specific suffix configuration against project requirements. The 'B' suffix denotes a ±5% voltage tolerance. Confirm whether RoHS compliance is required, as commercial versions offer matte-tin plating while military grades utilize tin-lead finishes. Ensure the ordering part number matches the desired metallurgical bond option if specified.

Selection Notes

Select this component when a 13 V reference with ±5% accuracy is needed in an axial-lead package. Consider the thermal resistance values for power derating calculations above 50°C ambient temperature. Verify that the maximum DC regulator current aligns with the circuit's load requirements. Check lead plating specifications to ensure compatibility with soldering processes and environmental regulations.

Part Context

This device belongs to the 1N5518B through 1N5546B series of 0.5 W Zener diodes. The series covers a voltage selection from 3.3 V to 33 V. These components are qualified per MIL-PRF-19500/437 for JAN, JANTX, and JANTXV reliability levels. The series offers various tolerance options including 1%, 2%, 5%, 10%, and 20%.

Replacement Considerations

Compatible substitutes within the same family include 1N5532B and 1N5534B. Verify that alternative part numbers match the required Zener voltage and tolerance specifications. Ensure the replacement maintains the DO-35 package style and meets the necessary thermal and electrical ratings.