1N5373E3/TR12

Overview

The Microchip Technology 1N5373E3/TR12 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, manufactured by the Microsemi Scottsdale Division. It provides voltage regulation at a nominal Zener voltage of 68V with a standard ±5% tolerance indicated by the 'B' suffix. The device features an axial lead T-18 plastic package and RoHS compliance via the 'e3' suffix. Electrical characteristics include a maximum dynamic impedance of 44 ohms, a reverse current of 0.5 µA, and a maximum regulator current of 2.0 A.

Feature Summary

• Provides stable voltage regulation across broad operating current and temperature ranges
• Features flexible axial-lead mounting terminals for through-hole applications
• Withstands high surge stresses and exhibits minimal voltage change versus current
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage generation in measurement equipment

Procurement Notes

Verify that the part number includes the 'e3' suffix to confirm RoHS compliance and matte tin plating. Confirm the 'TR12' suffix indicates tape and reel packaging per EIA-296 standards. Ensure the 'B' suffix is present to verify the required ±5% voltage tolerance. Cross-reference the manufacturer designation as Microsemi or Microchip Technology to ensure authenticity.

Selection Notes

Select this component when a 68V Zener voltage with ±5% tolerance is required for 5-watt power dissipation applications. Consider the thermal resistance of 25°C/W junction-to-lead for heat sinking requirements. Verify that the operating temperature range of -65°C to +150°C meets environmental specifications. Evaluate the need for tape and reel packaging if automated assembly is utilized.

Part Context

This component belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series offers a wide selection of voltages from 3.3V to 200V with various tolerance options identified by specific suffix letters. These devices are designed for high maximum DC currents with adequate heat sinking due to their low thermal resistance design.

Replacement Considerations

Equivalent parts within the same series include 1N5372B and 1N5374B for different voltage ratings. Military screening levels are available by adding MQ, MX, or MV prefixes. Surface mount equivalents such as SMBJ5373B or SMBG5373B may be considered for space-constrained designs.