1N5278B TR

Single Zener Diodes Overview

The Central Semiconductor Corp 1N5278B TR is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 170 V with a ±5% tolerance, housed in a DO-35 axial leaded package. The device supports a maximum power dissipation of 500 mW and operates within a junction temperature range of -65°C to +200°C. Electrical characteristics include a maximum reverse current of 0.1 mA at 129 V and a maximum Zener impedance of 1.9 kΩ at the test current of 0.74 mA.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using high-reliability silicon technology
• Features a glass passivated junction for enhanced durability
• Designed for industrial, commercial, and computer system applications

Single Zener Diodes Applications

• Industrial control systems
• Commercial equipment power supplies
• Computer application circuits

Single Zener Diodes Procurement Notes

Verify component status before procurement as this part has been transitioned to End of Life (EOL) status by the manufacturer. Confirm availability through authorized distributors or secondary markets. Check for specific ordering suffixes such as PBFREE if lead-free compliance is required. Review official Product Change Notifications for final shipment dates and minimum order quantity constraints associated with last-time buys.

Single Zener Diodes Selection Notes

Select this component when a 170 V regulation point is required in a low-power circuit. Ensure the design accommodates the specified 500 mW power dissipation limit under worst-case thermal conditions. Verify that the DO-35 through-hole package aligns with the PCB layout requirements. Consider the positive temperature coefficient characteristic for high-voltage operation stability.

Single Zener Diodes Part Context

This component belongs to the 1N5221B through 1N5278B series of 500 mW silicon Zener diodes manufactured by Central Semiconductor Corp. The series covers a voltage range from 2.4 V to 170 V. The 'TR' suffix indicates tape and reel packaging, while the 'B' suffix denotes the standard ±5% voltage tolerance.

Single Zener Diodes Replacement Considerations

No direct replacement part numbers are available from Central Semiconductor Corp for this discontinued item. Engineers must source equivalent specifications from other manufacturers or redesign the circuit to accommodate alternative components.