1N3018B-1

Overview

The Microchip Technology 1N3018B-1 is a hermetically sealed Zener diode designed for high-reliability applications. It features a nominal Zener voltage of 8.2 V with a tolerance of ±5%. The device operates in the through-hole DO-41 axial package and supports a maximum DC power dissipation of 1 W at a lead temperature of +95°C, with derating required above this threshold. It exhibits a maximum Zener impedance of 4.5 Ohms and a reverse leakage current of 10 µA at 6.2 V. The component is qualified under MIL-PRF-19500/115 standards, ensuring robust performance across an extended operating and storage temperature range from -65°C to +175°C.

Feature Summary

• Hermetically sealed construction compliant with MIL-PRF-19500/115 specifications for enhanced environmental durability
• Extended thermal capability supporting operation and storage temperatures between -65°C and +175°C
• Metalurgically bonded internal structure providing stability under high-power conditions

Applications

• Military aerospace electronic systems requiring radiation and vibration resistance
• Spacecraft power regulation circuits demanding long-term reliability
• High-temperature industrial control environments exceeding standard commercial limits

Procurement Notes

Verify that the specific order suffix matches the required qualification level, as the base part number covers multiple military grades including JAN, JANTX, and JANTXV. Confirm compliance with MIL-PRF-19500/115 requirements during procurement. Ensure the supplier provides appropriate documentation for hermetic sealing and material traceability. Check for RoHS status if applicable to the specific manufacturing lot, as military variants may differ from commercial equivalents.

Selection Notes

Select the 1N3018B-1 when a precise 8.2 V reference is needed in extreme thermal environments. The DO-41 package facilitates easy integration into existing through-hole layouts. Consider the 1 W power rating and necessary derating curves for thermal management design. This component is suitable where standard commercial diodes fail due to temperature or humidity constraints.

Part Context

This component belongs to the 1N3016B-1 through 1N3045B-1 series of 1-watt Zener diodes manufactured by Microchip Technology. These devices are engineered for ruggedized electronics and are widely utilized in defense and aviation sectors. The series offers various voltage options within the same physical footprint, simplifying supply chain management for multi-voltage designs.

Replacement Considerations

Direct replacements must match the 8.2 V nominal voltage, ±5% tolerance, and DO-41 axial package. Verify that substitute components meet the same MIL-PRF-19500/115 hermetic sealing standards and support the -65°C to +175°C operating range.