1N4470

Single Zener Diodes Overview

The Microchip Technology 1N4470 is a 1.5-watt Zener voltage regulator diode housed in an axial-lead DO-41 package. It provides a nominal Zener voltage of 16 V with a standard tolerance of ±5%. The device operates within a junction and storage temperature range of -65°C to +175°C. Key electrical characteristics include a maximum dynamic impedance of 10 Ohms at the test current of 15.5 mA, a maximum reverse leakage current of 50 nA at 12.8 V, and a forward voltage of 1.0 V at 200 mA.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction using internal metallurgical bonds for robust performance.
• Qualified per MIL-PRF-19500/406 standards for high-reliability applications where failure cannot be tolerated.
• Inherently radiation hard as described in Microsemi MicroNote 050.
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 method 1020.

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges.
• High-reliability aerospace and defense circuits requiring military qualification.
• Radiation-hardened electronic systems.

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required reliability level (JAN, JANTX, JANTXV, or JANS) and tolerance (standard 5%, 2%, or 1%). Confirm RoHS compliance status if applicable, as commercial versions may differ from military specifications. Ensure the package type aligns with the design requirements, as surface mount variants exist under different part numbers.

Single Zener Diodes Selection Notes

Select this component when a 1.5-watt power rating and 16-volt regulation are required in an axial leaded package. Consider tighter tolerance suffixes if precision exceeds standard 5% limits. Evaluate thermal derating curves for high-temperature environments above +50°C. Verify compatibility with existing circuit layouts designed for the DO-41 footprint.

Single Zener Diodes Part Context

This component belongs to the 1N4460 through 1N4496 series of industry-recognized 1.5-watt Zener voltage regulators. The series offers extensive voltage selections ranging from 3.3 to 200 volts. These devices are widely used in critical applications due to their hermetic sealing and military qualification history.

Single Zener Diodes Replacement Considerations

Direct parameter-equivalent replacements include the 1N4470C (2% tolerance) and 1N4470D (1% tolerance). Other military-grade levels such as JANTX1N4470 or JANS1N4470 provide the same electrical characteristics with varying reliability qualifications.