1N4750P/TR12

Overview

The Microchip Technology 1N4750P/TR12 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 27V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features a maximum power dissipation of 1.0 watts at 25°C. The 'TR12' suffix indicates tape and reel packaging compliant with EIA-296 standards.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Moisture classified as Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack

Applications

• Voltage regulation in electronic circuits
• General-purpose protection against voltage spikes
• Reference voltage sources in test equipment

Procurement Notes

Verify that the ordering suffix matches the required packaging configuration, as the TR12 designation specifically denotes tape and reel supply. Confirm compliance requirements such as RoHS status if applicable, noting that specific environmental certifications depend on the exact manufacturing batch and suffix variations. Ensure the component meets the necessary military screening levels if the application demands high reliability, which may require additional prefix identifiers beyond the standard commercial part number.

Selection Notes

Select this component when a 1-watt power rating and 27-volt regulation are required in an axial-lead format. The plastic construction offers lower thermal resistance compared to glass-body options. Consider the ±5% tolerance for standard applications; tighter tolerances like ±2% or ±1% require different suffixes. Evaluate the thermal derating curves for high-temperature environments to ensure steady-state power dissipation limits are not exceeded during operation.

Part Context

This part belongs to the widely used 1N47xx series of silicon Zener diodes manufactured by Microsemi (now Microchip). The series covers a voltage selection from 3.3 to 100 volts. The 'P' suffix identifies the plastic encapsulated version, distinct from the glass-body 'G' suffix option. These devices are JEDEC registered and serve as industry-standard regulators for various power and test current applications.

Replacement Considerations

Surface mount equivalents are available as SMAJ4750A and MLL4750A. Glass-body versions exist as 1N4750G. Commercial versions without the 'P' suffix offer 10% tolerance.