1N5333B

Single Zener Diodes Overview

The 1N5333B is a silicon Zener diode from the 1N53xxB series, rated for 5 watts of steady-state power dissipation. It features a nominal Zener voltage of 3.3 V with a ±5% tolerance. The device utilizes an axial-lead T-18 plastic package designed for through-hole mounting. Electrical characteristics include a maximum forward voltage of 1.2 V at 1 A and a test current of 380 mA. Operating temperatures range from -65 °C to +150 °C junction temperature.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses due to low thermal resistance design
• Offers flexible axial-lead mounting terminals for standard PCB integration

Single Zener Diodes Applications

• Voltage regulation in power supply circuits
• Surge protection applications requiring robust energy handling
• General-purpose voltage reference tasks within specified limits

Single Zener Diodes Procurement Notes

Verify component authenticity as this part number may be obsolete or superseded by newer revisions. Confirm RoHS compliance status, as original Microsemi versions were non-compliant while onsemi equivalents may differ. Ensure the specific suffix matches required tolerance and screening levels before procurement.

Single Zener Diodes Selection Notes

Select this component when a precise 3.3 V reference is needed with high power handling capabilities. Consider the T-18 package constraints for thermal management and physical space. Verify that the ±5% tolerance aligns with circuit requirements compared to tighter tolerance alternatives like the C or D suffix variants.

Single Zener Diodes Part Context

This device belongs to the JEDEC registered 1N5333B through 1N5388B series of 5-watt Zener diodes. Originally manufactured by Microsemi, production rights have transitioned to onsemi. The series covers voltages from 3.3 V to 200 V, offering various tolerance options identified by suffix letters such as B for ±5%.

Single Zener Diodes Replacement Considerations

Direct substitutes include other 1N5333B variants from different manufacturers ensuring identical electrical ratings. Surface mount equivalents are available in SMBJ5333 or SMBG5333 packages if board layout changes are permissible.