1N4751CP/TR12

Overview

The Microchip Technology 1N4751CP/TR12 is a silicon 1.0-watt Zener diode housed in a plastic DO-41 (DO-204AL) axial-lead package. It provides voltage regulation with a nominal Zener voltage of 30V 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 maximum reverse current of 5µA at a test voltage of 30V. Electrical characteristics include a dynamic impedance of 40 Ohms at a test current of 8.5mA, a knee impedance of 0.25 Ohms at 0.25mA, and a maximum forward voltage of 1.2V at 200mA.

Feature Summary

• Provides precise voltage regulation with a standard ±2% tolerance on nominal Zener voltage.
• Features flexible axial-lead mounting terminals suitable for through-hole applications.
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards.
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B, requiring no dry pack.

Applications

• Voltage regulation circuits over broad operating current and temperature ranges
• Reference voltage sources in electronic systems
• Protection against voltage transients

Procurement Notes

Verify that the ordering suffix matches the required specifications. The 'P' suffix designates plastic construction, while 'C' indicates a 2% voltage tolerance. Confirm RoHS compliance status if environmental regulations apply, as standard versions may differ from those with an 'e3' suffix. Ensure the tape and reel packaging aligns with automated assembly requirements.

Selection Notes

Select this component when a 30V regulation point with high precision is required. The 1W power dissipation rating supports steady-state operation up to specific thermal limits. Consider the plastic package's lower thermal resistance compared to glass-body options. Verify that the axial lead configuration fits the target PCB layout constraints.

Part Context

This part belongs to the 1N4728AP thru 1N4764AP series of 1.0 watt Zener diodes originally documented by Microsemi. The series offers extensive voltage selection from 3.3 to 100 volts. The 1N4751 variant specifically targets the 30V regulation segment within this lineup, utilizing JEDEC registered numbering conventions for compatibility.

Replacement Considerations

Surface mount equivalents are available as SMAJ4751A or MLL4751A. Glass-body options exist under the same JEDEC number but with different thermal characteristics. Military screening levels are accessible via specific prefix identifiers such as MQ, MX, MV, or MSP.