1N5348/TR8

Overview

The Microchip Technology 1N5348/TR8 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333-5388B series. It provides voltage regulation at a nominal Zener voltage of 11 V with a ±5% tolerance, indicated by the 'B' suffix. The device operates within a temperature range of -65°C to +150°C and features a T-18 axial lead package. Electrical characteristics include a test current of 125 mA, a maximum dynamic impedance of 2.5 Ohms, and a maximum reverse current of 5.0 µA.

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 through-hole integration

Applications

• Voltage regulation in power supply circuits
• Reference voltage generation in electronic systems
• Overvoltage protection applications

Procurement Notes

Verify the component status as this part number may be subject to discontinuation or lifecycle changes. Confirm RoHS compliance requirements, noting that standard versions may not meet current environmental standards unless specified with an e3 suffix. Ensure the TR8 tape and reel packaging matches your automated assembly equipment specifications before finalizing procurement orders.

Selection Notes

Select this component when a 5-watt power dissipation rating and an 11 V regulation point are required. The T-18 package supports high thermal performance compared to lower-power alternatives. Consider the specific tolerance requirements, as the B suffix denotes ±5%, while other suffixes offer tighter tolerances. Verify thermal management needs based on the junction-to-lead thermal resistance data provided in the datasheet.

Part Context

This device belongs to the Microsemi (now Microchip Technology) Scottsdale Division 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series covers a wide voltage selection from 3.3 V to 200 V. The 1N5348 variant specifically targets the 11 V regulation segment within this high-power axial-leaded product line.

Replacement Considerations

Check for equivalent parts within the 1N5333-5388B series for different voltage ratings. Surface mount equivalents such as SMBJ5333 to SMBJ5388B or SMBG5333B to SMBG5388B are available if footprint changes are permissible.