1N4475US

Single Zener Diodes Overview

The Microchip Technology 1N4475US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 27 V. It operates within a junction and storage temperature range of -65 °C to +175 °C and features a steady-state power dissipation rating of 1.5 W at 25 °C ambient temperature. The device utilizes a void-less hermetically sealed glass package (D-5A MELF) and includes internal metallurgical bonds. Electrical characteristics include a maximum dynamic impedance of 18 Ω at the test current of 9.5 mA, a maximum reverse leakage current of 53 µA at 21.6 V, and a forward voltage of 1.0 V at 200 mA.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass construction with tungsten slugs for robust reliability
• Internal Category I metallurgical bond ensuring structural integrity in high-reliability environments
• Triple-layer passivation providing enhanced protection against environmental factors
• Inherently radiation hard design suitable for demanding aerospace and defense applications

Single Zener Diodes Applications

• High-reliability military and aerospace circuits where failure cannot be tolerated
• Voltage regulation across broad operating current and temperature ranges
• Radiation-hardened electronic systems requiring stable breakdown characteristics

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required qualification level (JAN, JANTX, JANTXV, or JANS) as defined by MIL-PRF-19500/406. Confirm RoHS compliance status if applicable, noting that compliant versions are available only on commercial grade parts. Ensure the requested tolerance aligns with the standard 5% specification unless a specific tighter tolerance suffix is ordered.

Single Zener Diodes Selection Notes

Select this component when a surface mount equivalent of the JEDEC registered axial series is required for space-constrained designs. The D-5A MELF package provides a direct footprint replacement for through-hole variants while maintaining identical electrical performance. Consider the thermal resistance from junction to end cap when designing heat dissipation paths for continuous operation near maximum ratings.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of 1.5 Watt glass Zener diodes. These devices are industry-recognized regulators offering extensive voltage selections from 3.3 to 200 volts. The series is designed to replace traditional axial lead components in modern surface mount assembly processes without compromising the ruggedness associated with legacy through-hole packages.

Single Zener Diodes Replacement Considerations

Direct surface mount replacements include other members of the 1N44xxUS series. For axial lead equivalents, consult the 1N4460 through 1N4496 datasheet. Verify pinout compatibility and physical dimensions before substituting with non-Microchip manufactured parts.