1N4748CPE3/TR12

Overview

The Microchip Technology 1N4748CPE3/TR12 is a silicon 1-watt Zener diode in the 1N4728AP through 1N4764AP series. It provides voltage regulation with a nominal Zener voltage of 22 V and a tight tolerance of ±2%, indicated by the 'C' suffix. 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 maximum dynamic impedance of 23 Ohms at a test current of 11.5 mA, a maximum reverse current of 5 µA, and a forward voltage of 1.2 V maximum at 200 mA.

Feature Summary

• Provides precise voltage regulation with a standard ±2% tolerance on nominal Zener voltage.
• Features a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards.
• Offers flexible axial-lead mounting terminals suitable for through-hole applications.
• RoHS compliant devices are available with an 'e3' suffix indicating annealed matte-Tin plating.

Applications

• Voltage regulation over broad operating current and temperature ranges
• General purpose clipping and clamping circuits
• Reference voltage sources in electronic circuits

Procurement Notes

Verify that the ordering suffix matches the required specifications. The 'P' suffix indicates plastic construction, while 'e3' confirms RoHS compliance. The 'TR' suffix denotes tape and reel packaging per EIA-296 standards. Confirm the 'C' suffix corresponds to the required ±2% voltage tolerance. Ensure the component meets moisture classification Level 1 requirements without dry pack necessity.

Selection Notes

Select this component when a 22 V Zener voltage with high precision is required. The plastic package offers lower thermal resistance compared to glass-body options. Consider the ±2% tolerance if tighter regulation than the standard ±5% or ±10% variants is necessary. Verify compatibility with the DO-41 footprint and axial lead configuration for the target PCB design.

Part Context

This part belongs to the JEDEC registered 1N4728A to 1N4764A series of 1.0 watt Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. The specific model utilizes a plastic encapsulated body, distinguishing it from glass-body alternatives. It is designed for applications requiring stable performance across a wide temperature spectrum.

Replacement Considerations

Surface mount equivalents are available as SMAJ4748A and MLL4748A. Other tolerance variants include 1N4748A (±5%) and 1N4748D (±1%). Consult the factory for military screening prefixes such as MQ, MX, MV, or MSP if specific reliability levels are required.

FAQ

What does the 'C' suffix indicate in the part number?

The 'C' suffix signifies a standard voltage tolerance of plus or minus 2% on the nominal Zener voltage.

Is the device sensitive to electrostatic discharge?

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

What is the moisture classification level?

The moisture classification is Level 1 per IPC/JEDEC J-STD-020B, meaning no dry pack is required.