1N4756AP/TR12

Overview

The Microchip Technology 1N4756AP/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 at a nominal Zener voltage of 47 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 80 Ohms at a test current of 5.5 mA. It includes a tape and reel option for automated assembly.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals suitable for through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 47 V reference
• Power supply protection and clamping applications
• General-purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify that the ordering suffix matches the required packaging configuration, as the TR suffix indicates tape and reel format. Confirm RoHS compliance status if environmental regulations apply, noting that e3 suffixes denote compliant devices. Ensure the specific manufacturer designation aligns with project requirements, as production may involve Microsemi or Microchip Technology divisions.

Selection Notes

Select this component when a 47 V Zener voltage with ±5% tolerance is required in a plastic axial package. Consider the 1.0 W power dissipation rating and thermal resistance characteristics for heat management. Verify compatibility with existing PCB footprints designed for DO-41 packages. Evaluate the operating temperature range against environmental conditions to ensure reliable performance.

Part Context

This part belongs to the popular 1N4728AP through 1N4764AP series of 1.0 watt Zener diodes. The series offers an extensive voltage selection from 3.3 to 100 volts. The plastic encapsulated version provides lower thermal resistance compared to glass-body options while maintaining JEDEC registration. These devices are widely used in general voltage regulation tasks.

Replacement Considerations

Equivalent parts include other manufacturers' 1N4756A variants in DO-41 packages. Surface mount equivalents such as SMAJ4756A or MLL4756A are available but require different mounting considerations. Verify electrical parameters like dynamic impedance and test current when substituting.