1N4740AP/TR12

Overview

The Microchip Technology 1N4740AP/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 with a TR12 tape and reel configuration. It provides voltage regulation at a nominal Zener voltage of 10 V with 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 7 Ohms at a test current of 25 mA. It includes a maximum reverse current of 10 µA and supports a steady-state power dissipation of 1.0 watts.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole integration
• 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
• Reference voltage sources
• Overvoltage protection

Procurement Notes

Verify that the part number suffix matches the required specifications. Confirm the 'TR' designation indicates tape and reel packaging and ensure the specific reel quantity aligns with manufacturing requirements. Check for RoHS compliance status if environmental regulations apply to the assembly process.

Selection Notes

Select this component when a 10 V reference with ±5% tolerance is required in a 1 W axial package. Consider the thermal resistance characteristics and derating curves for high-power applications. Ensure the operating environment stays within the specified temperature limits and verify lead length requirements for PCB mounting.

Part Context

This component belongs to the 1N4728AP through 1N4764AP series of 1.0-watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series offers an extensive voltage selection from 3.3 to 100 volts. The 'P' suffix designates plastic construction, which provides lower thermal resistance compared to glass-body options.

Replacement Considerations

Surface mount equivalents are available as SMAJ4740A or MLL4740A. Consult the manufacturer for other compatible surface mount options.