1N4751P/TR8

Overview

The Microchip Technology 1N4751P/TR8 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, manufactured by Microsemi's Scottsdale Division. It provides voltage regulation at a nominal Zener voltage of 30V with a standard tolerance of ±10%. The device operates within a temperature range of -65°C to +150°C and features a plastic DO-41 (DO-204AL) axial-lead package. Electrical characteristics include a test current of 8.5 mA, a maximum dynamic impedance of 40 ohms at the test current, and a maximum reverse current of 5 µA. The component is supplied in tape and reel packaging.

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
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 30V reference
• Power supply protection against overvoltage conditions
• General-purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify that the ordering suffix 'TR' confirms tape and reel packaging as specified in the datasheet. Confirm the manufacturer origin is Microsemi or its successor entity, Microchip Technology. Ensure the part number matches the specific 1N4751P designation for the 30V variant with 10% tolerance. Check for RoHS compliance status if required, noting that the 'e3' suffix indicates RoHS compliance while the base 'P' suffix does not explicitly guarantee it without further verification.

Selection Notes

Select this component when a 30V Zener diode with 1W power dissipation is required in an axial package. The 10% voltage tolerance suits general regulation tasks where tighter precision is unnecessary. Consider the plastic construction for lower thermal resistance compared to glass-body options. Verify that the operating environment stays within the -65°C to +150°C range and that the lead length allows for proper heat dissipation according to the derating curves.

Part Context

This part belongs to the JEDEC registered 1N4728A through 1N4764A series of silicon Zener diodes. The 'P' suffix designates plastic encapsulation, distinguishing it from glass-body variants. The series offers extensive voltage selection from 3.3V to 100V. Military screening options are available via prefixes like MX, MV, or MSP, though the standard commercial version lacks these identifiers. Surface mount equivalents exist in SMAJ and MLL packages.

Replacement Considerations

Surface mount replacements include SMAJ4751A and MLL4751A. Glass-body equivalents use the G suffix instead of P. For RoHS compliance, select parts with the e3 suffix, such as 1N4751APE3/TR8.