1N5378A/TR8

Overview

The Microsemi Corporation 1N5378A/TR8 is a silicon 5.0-watt Zener diode in the JEDEC registered 1N5333B through 1N5388B series. It provides voltage regulation at a nominal Zener voltage of 100 V with a standard tolerance of ±10%, indicated by the 'A' suffix. The device operates within an ambient temperature range of -65°C to +150°C and features a T-18 axial lead package. Electrical characteristics include a maximum dynamic impedance of 90 Ohms, a reverse current of 0.5 µA tested at 72 V, and a maximum regulator current of 47.5 mA.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole applications
• Withstands high surge stresses and exhibits minimal changes in voltage versus current
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 100 V reference
• High-density electronic assemblies utilizing axial leads
• Equipment requiring robustness against high surge stresses

Procurement Notes

Verify that the part number includes the TR8 suffix to confirm tape and reel packaging compliance with EIA-296 standards. Ensure the A suffix is present to validate the ±10% voltage tolerance specification. Confirm RoHS compliance status if required, as standard versions may differ from e3 variants. Cross-reference the manufacturer's latest datasheet to verify current production status and any potential obsolescence notices.

Selection Notes

Select this component when a 100 V Zener voltage with ±10% tolerance is required for through-hole designs. The T-18 package offers low thermal resistance, allowing operation at high DC currents with adequate heat sinking. Consider the specific surge current ratings and dynamic impedance values for circuit stability. Verify that the operating temperature range meets the environmental requirements of the target application.

Part Context

This device belongs to the Microsemi 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series covers a wide voltage selection from 3.3 V to 200 V. These plastic encapsulated components are moisture classification Level 1 and do not require dry packing. The series is JEDEC registered and available in various military screening levels and surface mount equivalents.

Replacement Considerations

Equivalent parts within the same series include 1N5378B (±5% tolerance), 1N5378C (±2% tolerance), and 1N5378D (±1% tolerance). Surface mount alternatives with identical electrical characteristics are available in the SMBJ5378 and SMBG5378 packages.