1N4481C

Single Zener Diodes Overview

The Microchip Technology 1N4481C is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 47 V with a tight tolerance of 2%. The device is rated for a power dissipation of 1.5 W and operates within an extended temperature range from -65 °C to +175 °C. Key electrical characteristics include a maximum reverse leakage current of 50 nA, a Zener impedance of 50 Ohms at a test current of 5.5 mA, and a forward voltage of 1.5 V. The component is available in hermetically sealed packages including the axial DO-41 (D-5A) and surface-mount A-MELF configurations.

Single Zener Diodes Feature Summary

• Hermetically sealed construction suitable for high-reliability environments
• Extended operating temperature range supporting extreme thermal conditions
• Tight voltage tolerance ensuring precise regulation performance
• Low reverse leakage current for efficient standby operation

Single Zener Diodes Applications

• Military and aerospace voltage reference circuits
• High-reliability industrial power supply regulation
• Harsh environment protection and clamping applications
• Precision instrumentation voltage stabilization

Single Zener Diodes Procurement Notes

Verify the specific package variant required, as the 1N4481C designation applies to both through-hole DO-41 and surface-mount Melf formats. Confirm that the procurement specification explicitly requires hermetic sealing if the application demands radiation or moisture resistance. Ensure the selected suffix matches the intended mounting style and lead configuration to avoid assembly errors. Cross-reference the manufacturer's latest datasheet for any updates on material compliance or pinout definitions before finalizing orders.

Single Zener Diodes Selection Notes

Select this component when a stable 47 V reference is needed in space-constrained or high-vibration settings. The 1.5 W power rating allows for significant current handling compared to lower-power alternatives. Consider the 2% tolerance for applications requiring strict voltage accuracy without external trimming. Evaluate the thermal management requirements given the wide operating temperature range and power dissipation capabilities.

Single Zener Diodes Part Context

This part belongs to the standard 1N448x series of Zener diodes manufactured by Microchip Technology. It serves as a ruggedized alternative to commercial-grade regulators, offering enhanced durability for defense and aerospace sectors. The series provides various voltage options within the same physical footprint, allowing for design flexibility while maintaining consistent reliability standards across different voltage reference points.

Single Zener Diodes Replacement Considerations

JAN1N4481CUS

Single Zener Diodes FAQ

What is the difference between the 1N4481C and JAN1N4481CUS?

The JAN1N4481CUS is the military-grade version of the 1N4481C, featuring hermetic sealing in a surface-mount A-MELF package. The standard 1N4481C may refer to non-hermetic or through-hole variants depending on the specific suffix.

Is the 1N4481C available in a surface-mount package?

Yes, the 1N4481C family includes surface-mount versions such as the JAN1N4481CUS, which utilizes an A-MELF (SQ SMT) package for automated assembly.