1N5385C/TR12

Overview

The Microsemi Corporation 1N5385C/TR12 is a silicon 5.0-watt Zener diode with a nominal voltage of 170 V and a ±2% tolerance. It operates within a temperature range of -65°C to +150°C and features a T-18 axial lead package. The device has a maximum dynamic impedance of 380 Ohms, a forward voltage of 1.2 V at 1 A, and a reverse leakage current of 500 nA at 122 V.

Feature Summary

• Provides precise voltage regulation over 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 integration

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection systems
• Reference voltage generation in electronic instrumentation

Procurement Notes

Verify the component status as obsolete or end-of-life before procurement planning. Confirm that the TR suffix indicates tape and reel packaging per EIA-296 standards. Ensure compatibility with MIL-STD-750 soldering methods if required by specific application protocols.

Selection Notes

Select this component when a 170 V Zener voltage with tight ±2% tolerance is required. The 5-watt power rating necessitates adequate heat sinking to maintain performance. Verify that the T-18 axial package fits the designated PCB layout constraints.

Part Context

This part belongs to the JEDEC registered 1N5333B through 1N5388B series of 5.0-watt Zener diodes. The series offers voltages from 3.3 to 200 volts. The 'C' suffix specifically denotes the tighter ±2% tolerance compared to standard B (±5%) or A (±10%) variants.

Replacement Considerations

Public confirmed substitute part numbers: 1N5385B, 1N5385D.