ZM4748A

Single Zener Diodes Overview

The ZM4748A is a 1W surface mount Zener diode manufactured by Taiwan Semiconductor Corporation. It provides a nominal Zener voltage of 22V with a tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and utilizes a hermetically sealed glass MELF package (DO-213AB). Key electrical parameters include a test current of 11.5mA, a maximum regular impedance of 23 Ohms at the test current, and a leakage current of 5µA at a reverse voltage of 16.7V.

Single Zener Diodes Feature Summary

• Hermetically sealed glass construction for environmental protection
• Surface mount MELF package design for automated assembly
• Wide operating junction temperature range up to 175°C

Single Zener Diodes Applications

• Low voltage stabilizers
• Voltage references
• Adapters
• On-board DC/DC converters

Single Zener Diodes Procurement Notes

Verify the specific datasheet version and revision number against the manufacturer's official documentation before finalizing procurement. Confirm that the MELF package dimensions align with the target PCB footprint layout. Ensure compliance with RoHS requirements if applicable to the end product specifications.

Single Zener Diodes Selection Notes

Select this component when a 22V regulation point is required in a compact surface mount form factor. Consider the thermal resistance characteristics and derating curves for high-temperature environments. Verify that the package size fits within the available board space constraints compared to through-hole alternatives.

Single Zener Diodes Part Context

This part belongs to the ZM4728A through ZM4758A series from Taiwan Semiconductor. The series covers a wide Zener voltage range from 3.3V to 56V, all sharing the same 1W power dissipation rating and MELF package style. This allows for standardized inventory management across different voltage reference designs.

Single Zener Diodes Replacement Considerations

ZMY13

Single Zener Diodes FAQ

What is the polarity indicator on the ZM4748A?

Polarity is indicated by a cathode band on the device body.

Is the ZM4748A suitable for medical life-saving applications?

No, the device is not designed for use in medical, life-saving, or life-sustaining applications.