1N4746A,133

Overview

The Nexperia 1N4746A,133 is a low voltage regulator diode housed in a hermetically sealed SOD66 (DO-41) glass package. It provides a nominal working voltage of 18 V with a tolerance of ±5%. The device supports a maximum total power dissipation of 1000 mW and operates within a junction temperature range of -65 °C to +200 °C. Key electrical characteristics include a test current of 14 mA, a differential resistance of 20 Ω, and a maximum reverse current of 5 μA at the specified test conditions.

Feature Summary

• Hermetically sealed small glass package for environmental protection
• Low voltage regulation capability across a wide series range
• High thermal stability suitable for demanding operating environments

Applications

• Low voltage stabilizers

Procurement Notes

Verify the specific ordering suffix against official Nexperia documentation to confirm packaging configuration and compliance status. Ensure the procurement channel sources directly from authorized distributors or the manufacturer to guarantee product authenticity and traceability. Cross-reference the component marking band with datasheet specifications to validate the cathode identification before integration into circuit designs.

Selection Notes

Select this component when a stable 18 V reference is required in through-hole applications. The DO-41 package offers robust mechanical mounting compared to surface-mount alternatives. Consider the 1000 mW power rating and thermal resistance characteristics to ensure adequate heat dissipation under continuous load conditions without exceeding the maximum junction temperature limits defined in the absolute maximum ratings.

Part Context

This part belongs to the 1N47xxA series of voltage regulator diodes manufactured by Nexperia. The series comprises 22 types covering nominal working voltages from 3.3 V to 24 V. All variants share the same hermetically sealed SOD66 (DO-41) axial leaded glass package construction, ensuring consistent physical dimensions and mounting requirements across the family while varying only in their specific Zener voltage breakdown characteristics.

Replacement Considerations

Direct replacements include other manufacturers' 1N4746A parts that meet the same 18 V, 1 W, and DO-41 package specifications. Verify that substitute components maintain equivalent differential resistance and reverse leakage current values to ensure circuit performance parity.