JAN1N4492US

Single Zener Diodes Overview

The JAN1N4492US is a military-qualified, surface-mount Zener voltage regulator with a nominal breakdown voltage of 130.0 V and a test current (IZT) of 1.9 mA. It features a hermetically sealed void-less glass MELF package (D-5A) rated for 1.5 W steady-state power dissipation at 25°C ambient temperature. The device exhibits a maximum dynamic impedance of 500 Ohms at the test point and supports a continuous regulator current (IZM) of 104.0 mA. It operates within a junction temperature range of -65°C to +175°C and withstands a non-repetitive surge current of 1.1 A.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass construction with internal metallurgical bonds for high reliability.
• Qualified per MIL-PRF-19500/406 for JAN level military applications.
• Inherently radiation hard as described in Microsemi MicroNote 050.
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020.

Single Zener Diodes Applications

• High-reliability voltage regulation where failure cannot be tolerated.
• Radiation-hardened electronic systems.
• Military-grade surface mount circuit protection.

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required tolerance level and RoHS compliance status. Standard versions carry no suffix for 5% tolerance, while 'C' indicates 2% and 'D' indicates 1%. Ensure the procurement specification explicitly requests the JAN reliability level per MIL-PRF-19500/406. Confirm terminal plating requirements, as commercial grades may offer matte tin options, whereas military grades typically utilize tin/lead over copper.

Single Zener Diodes Selection Notes

Select this component when a 130 V Zener reference is required in a surface-mount form factor. The D-5A MELF package provides a compact alternative to axial leads while maintaining hermetic sealing. Consider the 500 Ohm dynamic impedance for noise sensitivity requirements. Verify thermal management capabilities against the 20°C/W junction-to-end cap thermal resistance for the intended operating environment.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of 1.5 Watt glass Zener diodes. These devices are designed as surface-mount equivalents to popular JEDEC registered series. The series covers a wide voltage range from 3.3 V to 200 V, offering various tolerance options including standard 5%, 2%, and 1% variants to suit different precision requirements.

Single Zener Diodes Replacement Considerations

Direct substitutes include other JAN1N4492US units from qualified manufacturers. Cross-reference with the broader 1N4460US–1N4496US family if voltage or tolerance adjustments are permissible. Ensure any replacement maintains the same D-5A MELF footprint and hermetic sealing characteristics for compatibility with existing PCB layouts and reliability standards.

Single Zener Diodes FAQ

What is the maximum continuous regulator current for the JAN1N4492US?

The maximum continuous regulator current (IZM) is 104.0 mA.

Is the JAN1N4492US sensitive to electrostatic discharge?

No, the device is non-sensitive to ESD per MIL-STD-750 method 1020.

What is the thermal resistance from junction to end cap?

The thermal resistance (RθJEC) is 20°C/W.