1N4761P/TR8

Overview

The Microsemi Corporation 1N4761P/TR8 is a silicon unidirectional voltage regulator diode belonging to the 1N4728AP through 1N4764AP series. It features a nominal Zener voltage of 75 V with a standard tolerance of ±10%. The device operates in a DO-41 (DO-204AL) plastic axial-lead package and provides a maximum power dissipation of 1.0 W at 25°C. Electrical characteristics include a test current of 3.3 mA, a maximum dynamic impedance of 175 Ohms at the test current, and a maximum reverse current of 5 µA at a test voltage of 56 V. The component supports an operating temperature range from -65°C to +150°C.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Moisture classified as Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack

Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging and compliance status. Confirm that the TR suffix indicates tape and reel packaging per EIA-296 standards. Ensure compatibility with RoHS requirements if applicable by checking for the e3 suffix. Validate lead material specifications, such as tin-lead or annealed matte-tin plating, against MIL-STD-750 method 2026 solderability requirements before procurement.

Selection Notes

Select this component when a 75 V Zener voltage with ±10% tolerance is required in a plastic axial-lead package. The P suffix designates plastic construction, which offers lower thermal resistance compared to glass-body options. Consider the 1.0 W power dissipation capability and the -65°C to +150°C operating temperature range for environmental suitability. Verify that the 175 Ohm dynamic impedance meets circuit stability requirements.

Part Context

This part belongs to the JEDEC registered 1N4728A through 1N4764A series of 1.0 Watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a voltage selection from 3.3 to 100 volts. The 1N4761 variant specifically targets the 75 V segment of this extensive lineup, offering standard tolerances identified by the absence of a letter suffix or the A suffix for tighter specifications.

Replacement Considerations

Surface mount equivalents are available as SMAJ4761A and MLL4761A. Military screening levels can be obtained by adding prefixes such as MQ, MX, MV, or MSP to the base part number. Consult the factory for other variations or specific screening requirements.