1N4756CP/TR8

Overview

The Microchip Technology 1N4756CP/TR8 is a silicon 1-watt Zener diode in the 1N4728AP through 1N4764AP series. It provides voltage regulation with a nominal Zener voltage of 47 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 80 Ohms at a test current of 5.5 mA, a maximum reverse current of 5 µA at 35.8 V, and a maximum forward voltage of 1.2 V at 200 mA.

Feature Summary

• Provides precise voltage regulation with a ±2% tolerance on nominal Zener voltage.
• 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.
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B, requiring no dry pack.

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required specifications. The 'P' suffix indicates plastic construction, while the 'C' suffix confirms the 2% voltage tolerance. Ensure the 'TR' suffix aligns with tape and reel packaging requirements. Confirm RoHS compliance status if applicable, as devices are available with an 'e3' suffix for lead-free plating. Cross-reference datasheet electrical limits with system design constraints.

Selection Notes

Select this component when a 47 V reference with high precision is required. The 1W power dissipation rating supports steady-state operation up to 105°C at the leads or 45°C ambient on FR4 boards. Consider the 80 Ohm dynamic impedance for load regulation needs. The plastic package offers lower thermal resistance compared to glass-body options. Verify that the axial lead form factor fits the target PCB layout.

Part Context

This part belongs to the JEDEC registered 1N4728A to 1N4764A series manufactured by Microsemi Scottsdale Division. The series covers voltages from 3.3 to 100 volts. Standard versions have 5% tolerance ('A' suffix), while tighter tolerances are available via specific suffixes. This specific variant utilizes a plastic encapsulated body rather than the glass option.

Replacement Considerations

Surface mount equivalents are available as SMAJ4756A or MLL4756A. Other manufacturers may offer direct replacements within the 1N47xx series, but verify pinout, power ratings, and tolerance levels match the original design requirements.