1N5356B/TR8

Overview

The Microchip Technology 1N5356B/TR8 is a silicon Zener diode with a nominal voltage of 19V and a power dissipation rating of 5W. It features a ±5% tolerance, indicated by the 'B' suffix, and utilizes a T-18 axial lead package. The device operates within a temperature range of -65°C to +150°C and has a maximum dynamic impedance of 3.0 ohms at a test current of 65 mA.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and exhibits minimal changes in voltage versus current
• Features flexible axial-lead mounting terminals for through-hole applications

Applications

• Voltage regulation circuits requiring 5W power handling
• Power supply protection against overvoltage conditions
• Reference voltage generation in electronic systems

Procurement Notes

Verify the specific ordering suffix to confirm compliance requirements. The 'TR8' suffix indicates tape and reel packaging per EIA-296 standards. Confirm that the component meets necessary environmental regulations such as RoHS if required for the intended application, noting that standard versions may differ from e3 compliant variants.

Selection Notes

Select this component when a 19V Zener reference with 5W capability is needed. Ensure adequate heat sinking is provided to maintain performance within the specified thermal resistance limits. Verify that the ±5% tolerance aligns with circuit precision requirements compared to tighter tolerance options available in the series.

Part Context

This part belongs to the JEDEC registered 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi (now Microchip). The series offers a wide selection of voltages from 3.3V to 200V with various tolerance options identified by suffix letters.

Replacement Considerations

Equivalent parts include other 19V 5W Zener diodes in the T-18 package. Cross-reference with the 1N5356A (±10% tolerance) or 1N5356C (±2% tolerance) if tolerance variations are acceptable. Verify pinout and thermal characteristics match before substitution.