1N4741P/TR8

Overview

The Microchip Technology 1N4741P/TR8 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 (DO-204AL) axial-lead package. It provides voltage regulation with a nominal Zener voltage of 11 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features a maximum dynamic impedance of 8 Ω at a test current of 23 mA. It includes a tape and reel packaging option indicated by the TR suffix.

Feature Summary

• Plastic encapsulated construction offering lower thermal resistance compared to glass-body options
• Moisture classification Level 1 requiring no dry pack
• Flexible axial-lead mounting terminals for through-hole applications
• ESD nonsensitive per MIL-STD-750 Method 1020

Applications

• Voltage regulation over broad operating current and temperature ranges
• General purpose circuit protection
• Reference voltage generation

Procurement Notes

Verify that the specific part number matches the required electrical characteristics, particularly the 11 V Zener voltage and ±5% tolerance. Confirm the presence of the 'TR' suffix indicates tape and reel packaging rather than bulk or cut tape. Ensure the component meets the necessary RoHS compliance status if required by the assembly process, as standard versions may differ from e3 variants.

Selection Notes

Select this component when a 1-watt power dissipation rating and axial lead form factor are required. The plastic body provides mechanical robustness and simplified handling due to Level 1 moisture sensitivity. Consider the thermal resistance specifications for heat management in high-temperature environments. Verify compatibility with existing JEDEC registered designs utilizing the 1N4741A baseline.

Part Context

This component belongs to the widely used 1N4728A through 1N4764A series of 1-watt Zener diodes originally registered by JEDEC. The 'P' suffix designates the plastic molded epoxy body, distinguishing it from glass-body alternatives. The series covers a voltage selection from 3.3 to 100 volts, providing extensive options for various regulation needs within a standardized package footprint.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4741A devices meeting identical JEDEC specifications. For plastic body equivalents, verify thermal resistance and package dimensions match DO-41 standards. Surface mount replacements such as SMAJ4741A are available but require different footprint considerations.