1N4748CP/TR8

Overview

The Microchip Technology 1N4748CP/TR8 is a silicon Zener diode with a nominal voltage of 22V and a maximum power dissipation of 1.0W at 25°C. It features a plastic DO-204AL (DO-41) axial-lead package and offers a tight voltage tolerance of ±2%, indicated by the 'C' suffix. The device operates within a temperature range of -65°C to +150°C and includes a tape-and-reel option for automated assembly.

Feature Summary

• Plastic encapsulated construction providing lower thermal resistance compared to glass-body options
• Moisture classification Level 1 requiring no dry pack handling
• Flexible axial-lead mounting terminals suitable for standard through-hole applications

Applications

• Voltage regulation over broad operating current and temperature ranges
• Surge protection circuits
• Reference voltage sources in electronic systems

Procurement Notes

Verify that the component matches the specific JEDEC registered part number and package type required for your design. Confirm the presence of the 'TR' suffix indicates tape-and-reel packaging rather than bulk. Ensure the 'C' suffix is present to guarantee the specified 2% voltage tolerance, as other suffixes denote different tolerances or constructions.

Selection Notes

Select this component when a precise 22V reference is needed with tighter accuracy than standard 5% variants. The plastic body offers better thermal performance than glass equivalents. Consider the tape-and-reel format for high-volume manufacturing efficiency. Verify that the 1.0W power rating and lead-mounted thermal characteristics align with the system's heat dissipation requirements.

Part Context

This device belongs to the popular 1N4728A through 1N4764A series of 1-watt Zener diodes. The series provides an extensive voltage selection from 3.3V to 100V. While the base 1N4748A typically carries a 5% tolerance, the 'C' suffix specifically denotes a 2% tolerance version. The 'P' suffix identifies the plastic molded epoxy body used in this variant.

Replacement Considerations

Equivalent parts include the 1N4748AP for standard 5% tolerance or 1N4748A for 10% tolerance. Surface mount equivalents are available as SMAJ4748A or MLL4748A. Military screening levels can be obtained by adding prefixes such as MQ, MX, MV, or MSP.