SMAJ4491CE3/TR13

Single Zener Diodes Overview

The SMAJ4491CE3/TR13 is a single Zener diode from the Microsemi SMAJ series, housed in a DO-214AC (SMAJ) surface-mount package. It provides a nominal Zener voltage of 120 V with a ±2% tolerance and a maximum steady-state power dissipation of 1.5 W. The device features a dynamic impedance of 4500 Ohms at a test current of 2.0 mA and a reverse leakage current of 25 µA maximum at 96.0 V. It operates within a temperature range of -55°C to +150°C.

Single Zener Diodes Feature Summary

• Metallurgically bonded construction for enhanced reliability
• Thermally efficient design with J-bend contacts for stress relief
• Low-profile flat surface facilitating automatic placement

Single Zener Diodes Applications

• High-reliability voltage regulation in low-profile surface mount locations
• Protection against ESD transients per IEC 61000-4-2
• Protection against electrical fast transients (EFT) per IEC 61000-4-4

Single Zener Diodes Procurement Notes

Verify that the ordering suffix 'e3' confirms RoHS compliance and matte-tin plating. Confirm the 'C' suffix indicates the required ±2% voltage tolerance. Ensure the 'TR13' designation matches the specific tape-and-reel packaging requirements for automated assembly processes.

Single Zener Diodes Selection Notes

Select this component when a precise 120 V reference is needed in a compact surface-mount footprint. The ±2% tolerance makes it suitable for applications requiring tighter voltage accuracy than standard ±5% devices. Consider the thermal resistance and derating characteristics if operating near the upper temperature limits.

Single Zener Diodes Part Context

This part belongs to the SMAJ4460 through SMAJ4496 series of 1.5 Watt Zener Diodes manufactured by Microsemi's Scottsdale Division. The series is designed to meet or exceed the performance of legacy axial components while offering superior surge handling capabilities due to a larger active die element.

Single Zener Diodes Replacement Considerations

The datasheet notes that this series meets or exceeds the electrical performance of the 1N4491 axial Zener diode.