1N5531D

Overview

The Microchip Technology 1N5531D is a single silicon Zener diode with a nominal voltage of 11 V and a tolerance of ±1%. It features a maximum power dissipation of 500 mW and operates within a junction temperature range of -65°C to 175°C. The device utilizes a DO-204AH (DO-35) axial through-hole package with two pins. Electrical characteristics include a maximum reverse leakage current of 50 nA at 9.9 V, a forward voltage of 1.1 V at 200 mA, and a maximum impedance of 80 Ohms.

Feature Summary

• Provides precise voltage regulation with a tight ±1% tolerance for stable reference applications.
• Features an extended operating temperature range from -65°C to 175°C for harsh environments.
• Utilizes a glass axial DO-35 package construction suitable for through-hole mounting.

Applications

• Voltage reference circuits requiring high precision
• Overvoltage protection in sensitive electronic systems
• Clamping applications in signal processing paths

Procurement Notes

Verify the specific suffix D indicates the ±1% tolerance variant distinct from standard commercial versions. Confirm package integrity and lead finish specifications against project requirements. Ensure compatibility with MIL-PRF-19500/437 standards if military qualification is mandated. Cross-reference datasheet revisions to confirm electrical parameter consistency before finalizing procurement orders.

Selection Notes

Select this component when a 11 V Zener voltage with strict ±1% accuracy is required. The 500 mW power rating supports moderate current loads in compact designs. The wide thermal range makes it suitable for industrial or aerospace contexts where standard commercial diodes may fail. Compare impedance values against load requirements to ensure effective regulation under varying current conditions.

Part Context

This part belongs to the 1N5531 series of low voltage avalanche Zener diodes manufactured by Microchip Technology. The series offers various tolerance options including ±1%, ±2%, and ±5%. The 1N5531D specifically denotes the highest precision tier within the standard axial glass package lineup, providing reliable performance for critical analog circuitry.

Replacement Considerations

JAN1N5531D-1 serves as a qualified military-grade equivalent with identical electrical parameters. Commercial variants like 1N5531C-1 offer similar functionality but with looser ±2% tolerance. Verify pinout compatibility and thermal management requirements when substituting with other 11 V Zener diodes from different manufacturers.