1N5945C

Single Zener Diodes Overview

The Microchip Technology 1N5945C G is a glass-passivated junction silicon Zener diode with a nominal voltage of 68 V and a tolerance of ±2%. It operates within a temperature range of -65°C to +175°C. The device provides a maximum steady-state power dissipation of 1.5 W at a lead temperature of 85°C, or 1.25 W at an ambient temperature of 25°C. It features a maximum dynamic impedance of 120 Ohms and a maximum reverse current of 1 µA at 51.2 V.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless hard glass construction with tungsten slugs for high reliability.
• Metallurgically enhanced internal contact design providing lower thermal resistance.
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 method 1020.
• Inherently radiation hard as described in Microsemi MicroNote 050.

Single Zener Diodes Applications

• Voltage regulation over a broad range of operating currents and temperatures.
• High-reliability applications requiring screening in reference to MIL-PRF-19500.
• Over-voltage protection circuits.

Single Zener Diodes Procurement Notes

Verify the specific suffix 'G' confirms the hermetically sealed glass casing variant rather than the plastic body option. Confirm RoHS compliance status if required, as commercial versions may differ from military-grade equivalents. Ensure the ordering nomenclature matches the desired tolerance level and screening requirements specified in the manufacturer's part number guide.

Single Zener Diodes Selection Notes

Select this component when a 68 V Zener voltage with tight ±2% tolerance is required. The DO-41 axial-leaded package is suitable for through-hole mounting. Consider the 1.5 W power rating and wide operating temperature range (-65°C to +175°C) for demanding environments. Verify that the glass encapsulation meets environmental sealing needs compared to plastic alternatives.

Single Zener Diodes Part Context

This part belongs to the 1N5913BG–1N5956BG series of 1.5-watt Zener diodes manufactured by Microchip Technology (formerly Microsemi). The series offers voltages from 3.3 V to 200 V with various tolerance options. The 'G' suffix specifically denotes the glass-cased version, which provides superior hermetic sealing and higher temperature ratings compared to the plastic-bodied 'P' suffix variants.

Single Zener Diodes Replacement Considerations

Direct substitutes include other 1N5945 series diodes with matching electrical characteristics. Equivalent parts must maintain the 68 V nominal voltage, ±2% tolerance, and 1.5 W power dissipation capability. Package compatibility should be verified if replacing with non-Microchip manufacturers.