85HQ040

Overview

The Microchip Technology 85HQ040 is a Schottky barrier rectifier diode designed for high-efficiency power conversion applications. It features a maximum repetitive peak reverse voltage of 40 V and an average forward rectified current rating of 80 A. The device utilizes a DO-5 (DO-203AB) axial leaded package, suitable for terminal mounting in industrial environments. Key electrical characteristics include a typical forward voltage drop of 740 mV at 80 A and a maximum reverse leakage current of 2 mA at 40 V. The component operates within a junction temperature range of -65°C to +175°C.

Feature Summary

• Schottky barrier technology provides low forward voltage drop for improved efficiency
• High thermal stability supports operation up to 175°C junction temperature
• Robust DO-5 axial leaded package enables secure terminal mounting

Applications

• Industrial power supply units
• DC-DC converter circuits
• Free-wheeling rectification in motor drives

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to ensure correct packaging and variant selection. Confirm RoHS compliance status as indicated in the datasheet, noting that this specific part may not meet current environmental directives. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before procurement.

Selection Notes

Select this component when a low-loss rectification solution is required for medium-voltage, high-current applications. The 40 V rating suits low-voltage DC systems, while the 80 A capacity handles substantial load currents. Ensure the design accommodates the DO-5 package dimensions and terminal mounting requirements. Verify thermal management strategies to maintain junction temperatures within the specified operational limits during continuous conduction.

Part Context

This device belongs to Microchip's discrete semiconductor portfolio, specifically within the Schottky rectifier category. It serves as a robust alternative to standard PN-junction diodes where reduced switching losses and lower forward voltage are critical. The product line targets industrial and commercial power electronics markets requiring reliable performance under demanding thermal conditions.

Replacement Considerations

Consult official substitution guides for equivalent Schottky rectifiers with matching 40 V and 80 A ratings. Verify pinout compatibility and package dimensions to ensure direct replacement feasibility without PCB redesign.