1N4748CP/TR12

Overview

The Microchip Technology 1N4748CP/TR12 is a silicon 1-watt Zener diode in the 1N4728AP through 1N4764AP series. It provides voltage regulation with a nominal Zener voltage of 22V 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 at 5V, and a maximum regulator current of 205 mA.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for standard 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 precise tolerance
• Power supply reference voltage generation
• Overvoltage protection in electronic systems

Procurement Notes

Verify the specific ordering suffixes against official documentation to confirm exact electrical tolerances and packaging configurations. Confirm RoHS compliance status as it varies by suffix. Check for military screening prefixes if high-reliability requirements are necessary. Ensure the tape and reel option matches production needs. Consult manufacturer resources for the most current data before procurement.

Selection Notes

Select this component when a 22V regulation point with ±2% accuracy is required in a 1-watt power class. The plastic DO-41 package offers lower thermal resistance compared to glass-body options. Consider the C suffix for tighter tolerances versus standard A or unmarked variants. Evaluate thermal derating curves for high-temperature environments. Verify lead length requirements for PCB mounting constraints.

Part Context

This part belongs to the JEDEC registered 1N4728A to 1N4764A series of silicon Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. The 'P' suffix designates plastic construction, while 'C' indicates a 2% voltage tolerance. Surface mount equivalents are available in SMAJ and MLL packages. Military screening options exist with specific prefixes.

Replacement Considerations

Equivalent parts include other 1N4748 variants with matching voltage and power ratings. Surface mount replacements include SMAJ4748A or MLL4748A. Glass-body equivalents use the G suffix instead of P. Verify tolerance and package compatibility before substitution.