1N5388A/TR12

Overview

The Microsemi Corporation 1N5388A/TR12 is a silicon 5.0-watt Zener diode in the JEDEC registered 1N5333-5388B series, housed in an axial-leaded T-18 package with a TR suffix for tape and reel packaging. It provides a nominal Zener voltage of 200 volts with a ±10% tolerance. The device operates within a temperature range of -65°C to +150°C and features a maximum reverse current of 0.5 µA at 144 V. Its maximum dynamic impedance is 480 ohms, and it withstands high surge stresses while maintaining minimal voltage changes versus current.

Feature Summary

• Provides stable voltage regulation across broad operating currents and temperature ranges
• Features flexible axial-lead mounting terminals for versatile installation
• Withstands high surge stresses without damage
• Exhibits minimal changes in voltage relative to current variations

Applications

• Voltage regulation circuits requiring high power dissipation
• Protection against high surge stresses in electronic systems
• Applications necessitating operation across wide temperature extremes

Procurement Notes

Verify that the component matches the specific 1N5388A designation, ensuring the A suffix confirms the required ±10% voltage tolerance rather than other available options. Confirm the TR12 suffix indicates the correct tape and reel packaging format. Check for lead-free (e3) variants if environmental compliance is mandatory, as standard versions may contain lead. Ensure adequate heat sinking is planned, as the device relies on thermal management for steady-state power dissipation.

Selection Notes

Select this component when a 200-volt Zener reference with ±10% tolerance is required in a through-hole axial configuration. Consider the 5-watt power rating and low thermal resistance design for applications demanding high DC currents. Evaluate the need for tape and reel packaging for automated assembly processes. Verify that the specified operating temperature range meets the environmental requirements of the target application.

Part Context

This part belongs to the Microsemi 1N5333-5388B series of silicon 5-watt Zener diodes. The series offers a wide selection of voltages from 3.3 to 200 volts with various tolerance levels identified by suffix letters. These plastic encapsulated devices are moisture classification Level 1 and do not require dry packing. Military equivalent screening levels are available via specific prefixes.

Replacement Considerations

Direct replacements include other 1N5388 variants with different tolerances, such as 1N5388B (±5%) or 1N5388 (±20%). Surface mount equivalents like SMBJ5388B or SMBG5388B are available but require layout modifications. RoHS-compliant versions exist as 1N5388E3.