1N5345/TR12

Single Zener Diodes Overview

The Microchip Technology 1N5345/TR12 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333-5388B series. It provides voltage regulation at a nominal Zener voltage of 8.7 V with a ±5% tolerance, indicated by the 'B' suffix. The device operates in a T-18 axial lead package and supports tape and reel packaging via the 'TR' suffix. Electrical characteristics include a test current of 150 mA, a maximum dynamic impedance of 2.0 Ohms, and a maximum reverse leakage current of 10 µA. It withstands a maximum regulator current of 6.2 A and features an operating temperature range from -65°C to +150°C.

Single Zener Diodes 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 through-hole installation
• Moisture classification Level 1 requiring no dry pack

Single Zener Diodes Applications

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

Single Zener Diodes Procurement Notes

Verify the component origin as the datasheet originates from Microsemi Scottsdale Division, which is now part of Microchip Technology. Confirm that the specific ordering suffixes correspond to the required RoHS compliance (e3) and tape and reel configuration (TR). Ensure the procurement matches the exact B suffix for the specified 5% voltage tolerance.

Single Zener Diodes Selection Notes

Select this component when a 5-watt power dissipation rating and an 8.7 V regulation point are required. The T-18 package offers low thermal resistance for heat sinking. Consider the ±5% tolerance if tighter precision is not needed. Verify that the application can accommodate the specified dynamic impedance and leakage current parameters under maximum operating conditions.

Single Zener Diodes Part Context

This component belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series covers a wide voltage selection from 3.3 V to 200 V. The 1N5345B variant specifically addresses the 8.7 V segment of this range. The TR12 suffix indicates tape and reel packaging, suitable for automated assembly processes.

Single Zener Diodes Replacement Considerations

Compatible substitutes within the same series include 1N5344B and 1N5346B for slightly different voltage ratings. Cross-manufacturer equivalents should be verified against the 5 W power dissipation and T-18 package dimensions.