1N4748APE3/TR8

Overview

The Microchip Technology 1N4748APE3/TR8 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 (DO-204AL) axial lead package. It provides voltage regulation with a nominal Zener voltage of 22 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features a maximum dynamic impedance of 23 Ohms at a test current of 11.5 mA. It includes RoHS compliant plating and tape & reel packaging.

Feature Summary

• Plastic encapsulated construction offering lower thermal resistance compared to glass-body options
• Moisture classification Level 1 requiring no dry pack storage
• ESD nonsensitive per MIL-STD-750 Method 1020
• Flexible axial-lead mounting terminals for through-hole applications

Applications

• Voltage regulation over broad operating current and temperature ranges
• General purpose circuit protection
• Reference voltage generation

Procurement Notes

Verify the specific manufacturer origin, as the 1N4748A part number is historically associated with multiple vendors including Microsemi and Transys Electronics. Confirm that the 'e3' suffix indicates RoHS compliance and the 'TR' suffix denotes tape and reel packaging. Ensure the component matches the required JEDEC registration standards and physical dimensions for your assembly process.

Selection Notes

Select this component when a 22 V regulation point is required with a 1 W power dissipation capability. The plastic DO-41 package is suitable for applications needing robust mechanical stability and lower thermal resistance than glass equivalents. Consider the ±5% voltage tolerance and the specific test current requirements for your circuit design to ensure accurate regulation performance.

Part Context

This component belongs to the widely used 1N47xxA series of 1-watt Zener diodes. The 'P' suffix identifies the plastic molded epoxy body, while the 'e3' suffix confirms the use of lead-free tin plating. The 'TR' suffix specifies the tape and reel shipping format, facilitating automated surface mount or through-hole placement equipment integration.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N4748A parts meeting the same electrical specifications. Equivalent plastic package variants such as those from Central Semiconductor or MCC are available. Verify that any replacement maintains the 22 V nominal voltage, 1 W power rating, and DO-41 footprint.

FAQ

What is the difference between the P suffix and G suffix for this diode?

The P suffix designates a plastic molded epoxy body, which provides lower thermal resistance compared to the glass-body option designated by the G suffix.

Is the 1N4748APE3/TR8 sensitive to electrostatic discharge?

No, the device is nonsensitive to ESD per MIL-STD-750 Method 1020.