1N5357A/TR12

Overview

The Microchip Technology 1N5357A/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 20V with a tolerance of ±10%, indicated by the 'A' 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 maximum dynamic impedance of 3.0 ohms and a maximum reverse current of 0.5 µA.

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 5W power dissipation
• High current applications with adequate heat sinking
• General purpose voltage reference applications

Procurement Notes

Verify that the component matches the specific part number 1N5357A/TR12, ensuring the 'TR12' suffix corresponds to the tape and reel packaging option as defined by EIA-296 standards. Confirm the manufacturer origin, noting the datasheet identifies the source as the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure the device meets the required moisture classification Level 1 specifications without dry pack requirements.

Selection Notes

Select this component when a 20V Zener voltage with ±10% tolerance is required for 5-watt power dissipation applications. Consider the T-18 axial lead package for through-hole mounting on FR4 PC boards. Evaluate thermal resistance requirements, noting the junction-to-lead resistance is 25°C/W at a 3/8 inch lead length. Verify compatibility with the specified operating temperature range of -65°C to +150°C.

Part Context

This component belongs to the 1N5333B thru 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 suffix letters. These plastic encapsulated devices are designed for high maximum DC currents and feature low thermal resistance designs suitable for robust voltage regulation tasks.

Replacement Considerations

Compatible substitutes within the same series include 1N5357B (±5% tolerance) or 1N5357C (±2% tolerance). Surface mount equivalents such as SMBJ5357 or SMBG5357 may be considered if package adaptation is feasible.