1N5338C/TR12

Single Zener Diodes Overview

The Microsemi Corporation 1N5338C/TR12 is a silicon 5.0-watt Zener diode with a nominal voltage of 5.1 V and a ±2% tolerance, indicated by the 'C' suffix. It utilizes an axial-lead T-18 package and is supplied in tape and reel format per EIA-296 standards. The device operates within a temperature range of -65°C to +150°C and features a maximum dynamic impedance of 1.5 Ohms at a test current of 240 mA. It withstands high surge stresses and exhibits minimal voltage change versus current.

Single Zener Diodes Feature Summary

• Provides precise voltage regulation with tight ±2% tolerance for critical circuit applications
• Capable of handling high maximum DC currents when adequately heat sunk
• Withstands high surge stresses and is nonsensitive to electrostatic discharge
• Features flexible axial-lead mounting terminals for versatile installation

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Protection against high surge stresses in power circuits
• Precision reference voltage generation requiring tight tolerances

Single Zener Diodes Procurement Notes

Verify the specific 'C' suffix designation confirms the required ±2% voltage tolerance, as standard variants may differ. Confirm the 'TR12' suffix aligns with the manufacturer's tape and reel specifications. Check for RoHS compliance status if lead-free terminals are mandatory, noting that non-e3 versions may contain tin-lead plating. Ensure adequate thermal management is planned given the 5W power dissipation rating.

Single Zener Diodes Selection Notes

Select this component when a 5.1V Zener voltage with tighter than standard ±5% or ±10% tolerance is required. The T-18 axial package suits through-hole mounting where space allows. Consider the thermal resistance characteristics and derating curves for high-current applications. Verify that the available surface mount equivalents, such as SMBJ series, do not better fit the assembly constraints if volume production is a priority.

Single Zener Diodes Part Context

This part belongs to the JEDEC registered 1N5333-5388B series of 5.0-watt silicon Zener diodes. The series offers a wide selection of voltages from 3.3V to 200V. The 'C' suffix specifically denotes a ±2% tolerance, distinguishing it from 'A' (±10%), 'B' (±5%), and 'D' (±1%) variants. The TR12 suffix indicates the tape and reel packaging option.

Single Zener Diodes Replacement Considerations

Surface mount equivalents include the SMBJ5338C and SMBG5338C series. Military screening levels JAN1N5338C, JANTX1N5338C, and JANTXV1N5338C are available via prefix additions. Verify pinout compatibility and thermal performance when substituting with other manufacturers' 5W axial Zener diodes.

Single Zener Diodes FAQ

What does the 'C' suffix indicate for the 1N5338C?

The 'C' suffix designates a standard voltage tolerance of plus or minus 2%, providing tighter regulation than the standard 'A' (±10%) or 'B' (±5%) suffixes.

How is the maximum regulator current determined for this device?

The maximum regulator current (IZM) is calculated using the formula IZM = P/VZM, where P is the rated power and VZM is the Zener voltage at the high end of the specified tolerance range.