1N4470US

Single Zener Diodes Overview

The Microchip Technology 1N4470US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 16 V and a maximum power dissipation of 1.5 W at 25 °C ambient temperature. It features a standard voltage tolerance of ±5% and a dynamic impedance of 600 Ohms at the test current of 15.5 mA. The device operates within a junction and storage temperature range of -65 °C to +175 °C, utilizing an A (D-5A) MELF package.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction using internal metallurgical bonds for robust performance.
• Military qualification available per MIL-PRF-19500/406 across JAN, JANTX, JANTXV, and JANS levels.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Single Zener Diodes Applications

• High-reliability applications where circuit failure cannot be tolerated
• Voltage regulation over broad operating current and temperature ranges
• Surface mount equivalents for JEDEC registered axial-lead series

Single Zener Diodes Procurement Notes

Verify the specific reliability level required, as the base part number corresponds to commercial grade while military grades require JAN, JANTX, JANTXV, or JANS prefixes. Confirm RoHS compliance status, noting that compliant versions are available only for commercial grade products. Ensure the ordering suffix matches the desired tolerance and packaging configuration before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 1.5 W surface mount Zener diode with high thermal stability is needed. The 16 V rating suits circuits requiring precise reference voltages within the specified temperature range. Consider tighter tolerance variants if the standard 5% deviation exceeds design margins. Verify lead-free soldering compatibility if environmental regulations mandate it.

Single Zener Diodes Part Context

This device belongs to the 1N4460US through 1N4496US series of voidless hermetically sealed surface mount Zener diodes. The series provides industry-recognized 1.5 W regulators in the A (D-5A) MELF package, offering a direct surface mount alternative to traditional axial-lead components while maintaining high reliability standards.

Single Zener Diodes Replacement Considerations

Direct parameter-equivalent replacements include the 1N4470C and 1N4470D, which share the same 16 V specification but utilize DO-41 through-hole packages instead of the surface mount MELF form factor.