1N5378BE3/TR8

Overview

The Microsemi Corporation 1N5378BE3/TR8 is a silicon Zener diode with a nominal voltage of 100V and a power dissipation rating of 5W. It features a ±5% tolerance indicated by the B suffix and utilizes an axial lead T-18 package. The device operates within a temperature range of -65°C to +150°C and includes RoHS compliance (e3) and tape-and-reel packaging (TR8).

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range.
• Withstands high surge stresses and offers minimal changes in voltage versus current.
• Features flexible axial-lead mounting terminals for standard through-hole applications.

Applications

• Voltage regulation circuits requiring 5W power handling.
• Surge protection applications utilizing high surge current ratings.
• General-purpose electronic equipment protected against overvoltage conditions.

Procurement Notes

Verify that the e3 suffix confirms RoHS compliant matte-tin plating and the TR8 suffix indicates tape-and-reel packaging per EIA-296 standards. Confirm the B suffix corresponds to the required ±5% voltage tolerance. Ensure the supplier provides documentation matching the JEDEC registered 1N5378B specifications.

Selection Notes

Select this component when a 100V Zener diode with 5W power dissipation is required. The axial lead format suits manual or standard automated insertion. Consider thermal derating curves if ambient temperatures exceed 25°C or if mounted on FR4 PCBs without adequate heat sinking.

Part Context

This part belongs to the 1N5333B thru 1N5388B series of JEDEC registered silicon Zener diodes manufactured by Microsemi Scottsdale Division. The series covers voltages from 3.3V to 200V, offering various tolerance options via suffix letters and military screening prefixes.

Replacement Considerations

Surface mount equivalents are available as SMBJ5378B or SMBG5378B. Other manufacturers produce identical 5W Zener regulators under the 1N5378B designation.

FAQ

What does the 'B' suffix indicate for this diode?

The 'B' suffix designates a standard voltage tolerance of plus or minus 5%.

How is polarity identified on the device?

Polarity is indicated by a band on the cathode end; the diode must be operated with the banded end positive relative to the opposite end.