1N5357/TR12

Overview

The Microchip Technology 1N5357/TR12 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333B through 1N5388B series. It provides voltage regulation at a nominal Zener voltage of 20 volts 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. The '/TR12' suffix designates tape and reel packaging compliant with EIA-296 standards.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and exhibits minimal voltage change versus current
• Features flexible axial-lead mounting terminals for standard through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body

Applications

• Voltage regulation in power supply circuits
• Reference voltage sources for electronic systems
• Overvoltage protection stages

Procurement Notes

Verify the specific manufacturer origin, as the datasheet identifies Microsemi Scottsdale Division while other records list Microchip Technology. Confirm that the TR12 suffix strictly denotes tape and reel packaging without altering electrical characteristics. Ensure the component matches the required T-18 axial lead form factor for your assembly process.

Selection Notes

Select this component when a 20-volt regulation point is required with a 5-watt power dissipation capability. The ±5% tolerance suits general-purpose applications where tighter precision is unnecessary. Consider the thermal resistance and derating curves if the ambient temperature exceeds 25°C or if heat sinking on an FR4 board is utilized.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series offers a wide selection of voltages ranging from 3.3V to 200V. The 1N5357B variant specifically targets the 20V regulation segment within this extensive lineup of plastic encapsulated devices.

Replacement Considerations

Equivalent parts include the 1N5357B (standard bulk) and 1N5357B/e3 (RoHS compliant). Surface mount equivalents are available as SMBJ5357B or SMBG5357B.