1N5356B

Overview

The Microsemi Corporation 1N5356B is a silicon unidirectional Zener diode with a nominal voltage of 19V and a power dissipation rating of 5W. It features a ±5% tolerance, indicated by the 'B' suffix, and operates within a temperature range of -65°C to +150°C. The device utilizes a T-18 plastic axial-lead package (DO-201AE) with an isolated case connection. Electrical characteristics include a maximum dynamic impedance of 3.0 Ω at a test current of 65 mA, a maximum reverse current of 0.5 µA, and a maximum regulator current of 5.3 A.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and exhibits minimal changes in voltage versus current
• Features flexible axial-lead mounting terminals for versatile installation
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B without requiring dry pack

Applications

• Voltage regulation circuits
• Surge protection applications
• General-purpose electronic equipment

Procurement Notes

Verify that the component matches the specific JEDEC registered series requirements. Confirm the presence of the B suffix to ensure the correct ±5% voltage tolerance. Check for military screening prefixes if MIL-PRF-19500 compliance is required. Ensure the RoHS compliant e3 suffix is present if lead-free specifications are mandatory for the assembly process.

Selection Notes

Select this component when a 5-watt power rating and a 19-volt reference are necessary. Consider the T-18 package dimensions for board layout constraints. Evaluate thermal resistance values based on the intended heat sinking method, as steady-state power dissipation varies significantly between free-air and PCB-mounted configurations.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a wide voltage selection from 3.3 volts to 200 volts. Variations in tolerance are defined by suffix letters, while military equivalents are available through specific prefix identifiers.

Replacement Considerations

Surface mount equivalents such as SMBJ5356B or SMBG5356B are available. Other manufacturers may offer generic 1N5356B replacements, but verification of electrical parameters and package dimensions is required.