1N4737APE3/TR12

Overview

The Microchip Technology 1N4737APE3/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 axial lead package. It provides voltage regulation with a nominal Zener voltage of 7.5 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features RoHS-compliant annealed matte-tin plating on its terminals.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• 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
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 1.0-watt power dissipation
• Power supply reference voltage generation
• Overvoltage protection in electronic systems

Procurement Notes

Verify that the ordering suffix matches the required specifications. Confirm the 'e3' suffix indicates RoHS compliance and the 'TR12' designation corresponds to tape and reel packaging. Ensure the manufacturer source aligns with the specific JEDEC registered part number requirements for your design.

Selection Notes

Select this component when a 7.5 V regulated voltage is needed with a 5% tolerance. Consider the 1.0-watt power rating and the plastic DO-41 package for thermal and mechanical constraints. Verify compatibility with existing PCB footprints designed for axial lead components.

Part Context

This part belongs to the widely used 1N47xxA series of silicon Zener diodes. The 'P' suffix denotes plastic encapsulation, offering lower thermal resistance compared to glass-body options. The 'e3' suffix confirms environmental compliance, while 'TR12' specifies the reel packaging format for automated assembly.

Replacement Considerations

Compatible substitutes include other 1N4737A variants from different manufacturers, provided they meet the 7.5 V Zener voltage, 1.0 W power dissipation, and ±5% tolerance specifications. Ensure the replacement package matches the DO-41 form factor.