CLL4738A BK PBFREE

Single Zener Diodes Overview

The CLL4738A BK PBFREE is a surface mount silicon Zener diode from the CLL4728A series by Central Semiconductor Corp. It provides a nominal Zener voltage of 8.2 V with a ±5% tolerance, tested at a current of 31 mA. The device features a maximum power dissipation of 1 W and operates within a junction temperature range of -65 °C to +200 °C. Electrical specifications include a maximum Zener impedance of 4.5 Ω at test current and 700 Ω at knee current, alongside a maximum reverse leakage current of 10 µA at 6.0 V. It utilizes a MELF (DO-213AB) package.

Single Zener Diodes Feature Summary

• Surface mount design utilizing a glass-encapsulated MELF case for industrial and commercial applications.
• High thermal stability supporting operation up to a junction temperature of 200 °C.
• Precision voltage regulation capability with standard ±5% tolerance for the 'A' suffix designation.

Single Zener Diodes Applications

• Voltage regulation in computer systems
• Industrial control circuitry
• Commercial entertainment equipment

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix required for your application. The datasheet indicates that adding the TR suffix secures tape and reel packaging on 7-inch reels. Confirm lead-free plating requirements, as the PB FREE suffix ensures compliance with specific material composition standards distinct from tin/lead options.

Single Zener Diodes Selection Notes

Select this component when a compact surface mount solution is required for precise voltage reference or regulation tasks. The MELF package offers robust mechanical integrity suitable for automated placement. Ensure the 1 W power dissipation rating aligns with the thermal management capabilities of the target PCB layout.

Single Zener Diodes Part Context

This part belongs to the CLL4728A through CLL4764A series, which covers a wide voltage range from 3.3 V to 100 V. All devices in this family share identical physical dimensions and electrical testing conditions, differing primarily in their specific Zener voltage ratings and corresponding impedance values.

Single Zener Diodes Replacement Considerations

Cross-reference other manufacturers offering 8.2 V Zener diodes in the DO-213AB MELF package. Verify that substitute components meet the 1 W power dissipation requirement and maintain comparable impedance characteristics at both test and knee currents.

Single Zener Diodes FAQ

What is the maximum reverse leakage current specified for this device?

The maximum reverse leakage current is 10 µA when measured at a reverse voltage of 6.0 V.

How does the 'A' suffix affect the voltage tolerance?

The 'A' suffix designates a standard Zener voltage tolerance of ±5%. Other suffixes like 'C' or 'D' indicate tighter tolerances of ±2% or ±1%, respectively.