1N5525B-1

Overview

The Microchip Technology 1N5525B-1 is a low voltage avalanche Zener diode with a nominal breakdown voltage of 6.2 V at a test current of 1.0 mA. It features a maximum dynamic impedance of 30 Ohms and a maximum reverse leakage current of 4.5 µA at 5 V. The device dissipates up to 0.5 W and operates within a junction temperature range of -65°C to +175°C. It utilizes a hermetically sealed axial-lead glass DO-35 package.

Feature Summary

• Hermetically sealed internal metallurgical bond construction
• Qualified per MIL-PRF-19500/437 for JAN, JANTX, and JANTXV reliability levels
• Inherently radiation hard design
• Minimal capacitance characteristics

Applications

• Voltage regulation over broad operating current and temperature ranges
• Military and aerospace electronic circuits requiring high reliability
• Radiation-hardened system designs

Procurement Notes

Verify the specific military qualification level (JAN, JANTX, or JANTXV) required for your application, as this suffix dictates the testing standards. Confirm RoHS compliance status if environmental regulations apply, noting that RoHS versions are available only for commercial grades. Ensure the metallurgical bond option matches your mechanical requirements.

Selection Notes

Select the 1N5525B-1 when a precise 6.2 V reference is needed in harsh environments. The B suffix guarantees tighter voltage tolerances compared to standard JEDEC types. The -1 suffix ensures hermetic sealing suitable for vacuum or extreme conditions. Consider the thermal resistance values for power derating calculations above 50°C ambient temperatures.

Part Context

This component belongs to the 1N5518 thru 1N5546 series of 0.5 watt axial-leaded glass Zener Voltage Regulators. The series provides voltages from 3.3 to 33 volts. The 1N5525 variant specifically targets the 6.2 V segment of this lineup, offering standardized performance for general-purpose and specialized regulator applications.

Replacement Considerations

Standard 1N5525B units lack the hermetic seal. Equivalent parts must match the DO-35 package and 6.2 V rating. Verify if the replacement supports the required MIL-PRF-19500/437 qualification level if radiation hardness or hermeticity is critical.

FAQ

What does the -1 suffix indicate?

The -1 suffix indicates an internal metallurgical bond option, providing a hermetically sealed package construction.

Is this component radiation hard?

Yes, the device is inherently radiation hard as described in Microsemi MicroNote 050.

What is the maximum DC power dissipation?

The steady-state power dissipation is rated at 0.5 W.