CMHZ4678 BK

Single Zener Diodes Overview

The Central Semiconductor Corp CMHZ4678 BK is a surface mount silicon low level Zener diode designed for voltage regulation. It operates within the SOD-123 case and provides a nominal Zener voltage of 1.8 V with a tolerance of ±5%. The device supports a maximum power dissipation of 500 mW at 75°C ambient temperature and functions across a junction temperature range of -65°C to +150°C. Electrical characteristics include a test current of 50 μA, a maximum reverse current of 7.5 μA at 1.0 V, and a maximum Zener current of 120 mA.

Single Zener Diodes Feature Summary

• Designed as a highly reliable voltage regulator suitable for applications requiring extremely low operating current and low leakage.
• Utilizes a compact SOD-123 surface mount case for efficient PCB integration.

Single Zener Diodes Applications

• Low-level voltage regulation circuits
• Applications requiring low operating current
• Circuits demanding low leakage performance

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix required for your manufacturing process. The datasheet indicates that adding 'TIN/LEAD' requests Tin/Lead plating, while 'PBFREE' specifies Lead-free plating. Confirm the exact part number string matches your bill of materials before placing orders to ensure correct material composition and compliance with environmental standards.

Single Zener Diodes Selection Notes

Select this component when a precise 1.8 V reference is needed in a small surface mount footprint. Ensure the circuit design accommodates the 500 mW power dissipation limit and the specified junction temperature range. Verify that the low leakage and noise density specifications meet the requirements of the target application environment.

Single Zener Diodes Part Context

This component belongs to the CMHZ4678 through CMHZ4717 series of surface mount silicon low level Zener diodes. The series covers a voltage range from 1.8 V to 43 V, all sharing the same 500 mW power rating and 5% tolerance. The CMHZ4678 represents the lowest voltage option in this specific SOD-123 packaged family.

Single Zener Diodes Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

Single Zener Diodes FAQ

What marking code corresponds to the CMHZ4678?

The marking code for the CMHZ4678 is CCC.

What is the maximum forward voltage for this diode?

The maximum forward voltage (VF) is 1.5 V at an forward current (IF) of 100 mA.