1N5355/TR12

Overview

The Microchip Technology 1N5355/TR12 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333B through 1N5388B series. It provides voltage regulation at a nominal Zener voltage of 18 V with a standard tolerance of ±5%. The device features an axial-lead T-18 package and operates within a temperature range of -65°C to +150°C. Electrical characteristics include a maximum dynamic impedance of 2.5 Ohms, a reverse current of 0.5 µA, and a maximum regulator current of 5.5 A when adequately heat sunk.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and offers flexible axial-lead mounting terminals
• Features minimal changes in voltage versus current as specified by voltage regulation parameters
• Constructed with a void-free transfer molded thermosetting epoxy body

Applications

• Voltage regulation circuits requiring robust thermal performance
• Power supply protection against high surge stresses
• General purpose voltage reference applications

Procurement Notes

Verify the specific suffix configuration for the ordered part number. Confirm that the TR suffix indicates tape and reel packaging per EIA-296 standards. Ensure compatibility with RoHS compliance requirements if applicable to the assembly process. Check datasheet specifications for derating curves to validate thermal management strategies under intended load conditions.

Selection Notes

Select this component for applications requiring a 5-watt power dissipation capability and precise voltage regulation. Consider the ±5% tolerance associated with the B suffix for standard precision needs. Evaluate thermal resistance values to determine appropriate heat sinking requirements for maintaining junction temperatures within safe operating limits during continuous operation.

Part Context

This component belongs to the 1N5333B through 1N5388B series of silicon Zener diodes manufactured by Microsemi (now Microchip Technology). The series covers a wide voltage selection from 3.3 V to 200 V. These devices are designed for high DC currents with adequate heat sinking and offer various tolerance options identified by suffix letters such as A, B, C, or D.

Replacement Considerations

Equivalent parts within the 1N5333B-1N5388B series may be considered based on voltage and tolerance requirements. Surface mount equivalents like SMBJ5333 to SMBJ5388B are available for different form factors. Verify mechanical dimensions and electrical parameters match before substitution.