1N4756P/TR8

Overview

The Microchip Technology 1N4756P/TR8 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, providing voltage regulation with a nominal Zener voltage of 47 V and a standard tolerance of ±5%. It operates within an ambient temperature range of -65°C to +150°C and features a plastic DO-41 (DO-204AL) axial-lead package. The device exhibits a maximum dynamic impedance of 80 Ohms at a test current of 5.5 mA, with a maximum reverse leakage current of 5 µA at 35.8 V. It supports steady-state power dissipation of 1.0 W at lead temperatures below 105°C or ambient temperatures below 45°C on FR4 PCBs.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for standard through-hole integration
• Constructed with void-free transfer molded thermosetting epoxy meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• General-purpose voltage regulation tasks

Procurement Notes

Verify that the ordering suffix 'TR8' aligns with the manufacturer's tape and reel specifications, as the datasheet identifies 'TR' as the standard designation for this packaging option. Confirm RoHS compliance status by checking for the 'e3' suffix if required, as the base part number does not explicitly guarantee it. Ensure the procurement documentation matches the specific JEDEC registration and screening levels defined for the 1N4756A series.

Selection Notes

Select this component when a 47 V regulation point is required with a 5% tolerance and 1.0 W power handling capability. The plastic construction offers lower thermal resistance compared to glass-body options, making it suitable for applications where efficient heat dissipation is necessary. Verify that the operating environment stays within the specified -65°C to +150°C range and that the circuit design accommodates the 80 Ohm dynamic impedance characteristics.

Part Context

This device belongs to the widely recognized 1N47xx series of silicon Zener diodes, specifically the plastic encapsulated variants designated by the 'P' suffix. Manufactured under the Microsemi Scottsdale Division lineage now integrated into Microchip Technology, these components are JEDEC registered. The series spans from 3.3 V to 100 V, offering extensive voltage selection for diverse electronic design requirements while maintaining standardized mechanical dimensions.

Replacement Considerations

Equivalent parts include the 1N4756A and 1N4756AP. Surface mount alternatives such as SMAJ4756A or MLL4756A are available but require different footprint considerations.