1N4534

Overview

The Microsemi Corporation 1N4534 is a small signal switching diode designed for through-hole mounting in a DO-34-2 package. It operates within a junction temperature range of -65°C to 175°C and features a maximum DC reverse voltage of 75 V with a forward voltage of 1.2 V at 100 mA. The device supports an average rectified current of 125 mA and exhibits a reverse leakage current of 500 nA at 75 V, with a reverse recovery time of 20 ns.

Feature Summary

• Provides stable switching performance across a wide operating temperature range from -65°C to 175°C.
• Features low reverse leakage current to maintain circuit integrity under reverse bias conditions.
• Utilizes a glass axial-leaded DO-34 package construction for reliable through-hole integration.

Applications

• High-reliability military electronic systems requiring robust switching components
• Precision instrumentation circuits demanding minimal leakage current
• Aviation and aerospace equipment operating in extreme thermal environments

Procurement Notes

Verify the specific revision level and manufacturing origin when sourcing this component, as historical production data indicates potential variations between original Microsemi/Microsemi outputs and subsequent Microchip transitions. Confirm that the unit matches the exact DO-34-2 physical dimensions and electrical specifications required by the design, ensuring compatibility with legacy military qualification standards if applicable to the system architecture.

Selection Notes

Select the 1N4534 for applications requiring a standard small-signal switching diode with high-temperature capability and low leakage characteristics. Ensure the design accommodates the 125 mA average rectified current limit and the 75 V reverse voltage rating. Consider the through-hole DO-34 package constraints during PCB layout and verify that the 20 ns reverse recovery time meets the speed requirements of the target switching frequency.

Part Context

This component belongs to the broader family of small-signal switching diodes manufactured by Microsemi Corporation, now part of Microchip Technology. These devices are engineered for general-purpose rectification and switching tasks in harsh environments. The 1N4534 specifically addresses needs for reliability in defense and industrial sectors where consistent performance under thermal stress is critical.

Replacement Considerations

Consult official Microchip or Microsemi documentation for verified cross-reference part numbers. Do not substitute with generic equivalents without verifying electrical parameters and package compatibility against the original specification sheet.