1N5527B

Overview

The Microchip Technology 1N5527B is a low voltage avalanche Zener diode with a nominal breakdown voltage of 7.5 V at a test current of 1 mA. It operates within the DO-35 (DO-204AH) axial-lead glass package and supports a steady-state power dissipation of 0.5 W. The device features a maximum dynamic impedance of 35 Ohms and a reverse leakage current of 6 µA at 6.8 V. It provides a voltage tolerance of ±5% and functions across a junction temperature range of -65°C to +175°C.

Feature Summary

• Provides stable voltage regulation over a broad operating current and temperature range
• Features hermetically sealed axial-lead glass construction for environmental protection
• Offers minimal capacitance characteristics suitable for high-frequency applications
• Demonstrates inherent radiation hardness capabilities

Applications

• Voltage reference circuits requiring precise regulation
• Overvoltage protection in sensitive electronic systems
• Clamping applications in signal processing paths
• Power supply regulation modules

Procurement Notes

Verify that the specific procurement order matches the JEDEC type number 1N5527B to ensure the correct ±5% voltage tolerance. Confirm the package style corresponds to the standard axial-lead DO-35 configuration unless a metallurgical bond variant is explicitly required. Ensure compliance with MIL-PRF-19500/437 standards if military qualification levels are necessary for the intended deployment environment.

Selection Notes

Select this component when a 7.5 V reference point is required with moderate precision. The 0.5 W power rating dictates thermal management considerations for continuous operation. Verify that the 35 Ohm dynamic impedance meets the noise and regulation requirements of the target circuit design compared to tighter tolerance alternatives.

Part Context

This part belongs to the 1N5518 through 1N5546 series of low voltage avalanche Zener diodes manufactured by Microchip Technology. The series covers a voltage selection from 3.3 to 33 volts. The 1N5527B specifically targets the 7.5 volt segment with a standard commercial grade tolerance, distinct from the higher reliability JAN or JANTX variants which require additional suffixes.

Replacement Considerations

Parametric equivalents include the 1N5527C and 1N5527D, which offer tighter voltage tolerances of ±2% and ±1% respectively. Substitutes such as the 1N5527B/TR provide the same electrical characteristics but utilize tape and reel packaging instead of bulk distribution.