CDLL257

Current Regulation - Diodes, Transistors Overview

The CDLL257 is a temperature-compensated Zener diode manufactured by Microchip Technology, designed for precision voltage regulation applications. It utilizes a leadless surface-mount MELF package (DO-213AA-2) with double plug construction and metallurgically bonded terminals to ensure reliability in harsh environments. The device operates within an extended temperature range of -65°C to +175°C, making it suitable for high-temperature industrial and automotive systems. Key electrical characteristics include a nominal Zener voltage of 4.7V with a tolerance of ±5%, a maximum power dissipation of 500mW, and a test current of 20mA. The component features low reverse leakage current and stable performance under thermal stress.

Current Regulation - Diodes, Transistors Feature Summary

• Temperature compensation ensures stable voltage regulation across wide operating ranges
• Leadless surface-mount design facilitates automated assembly and compact PCB layouts
• Double plug construction provides robust mechanical stability and thermal conductivity
• Metallurgically bonded terminals offer superior resistance to soldering heat and environmental corrosion

Current Regulation - Diodes, Transistors Applications

• Precision voltage reference circuits in industrial control systems
• Over-voltage protection stages in automotive electronic modules
• Temperature-stable biasing networks in aerospace instrumentation
• Regulator feedback loops requiring high thermal endurance

Current Regulation - Diodes, Transistors Procurement Notes

Verify the specific suffix designation when ordering, as it determines the packaging format such as bulk or tape-and-reel quantities. Confirm RoHS compliance status directly with the manufacturer, as historical data indicates variations in environmental declarations for this series. Ensure the procurement channel sources from authorized Microchip distributors to guarantee authenticity and traceability of the semiconductor components.

Current Regulation - Diodes, Transistors Selection Notes

Select the CDLL257 when a precise 4.7V reference is required with tight tolerance specifications. Consider this component for designs demanding operation at temperatures exceeding standard commercial limits. Evaluate the 500mW power rating against expected thermal dissipation in the final enclosure. Compare the DO-213AA-2 footprint constraints with available board space before finalizing the schematic.

Current Regulation - Diodes, Transistors Part Context

This component belongs to the CDLL52xx series of Zener diodes produced by Microchip Technology. The series is characterized by its use in high-reliability applications where traditional axial leads are unsuitable. The CDLL257 specifically addresses the need for a 4.7V regulated voltage in a compact, thermally efficient package. It complements other voltage references in the portfolio that offer different nominal voltages and power ratings.

Current Regulation - Diodes, Transistors Replacement Considerations

Direct replacements must match the 4.7V Zener voltage, ±5% tolerance, and 500mW power dissipation. Verify pinout compatibility with the DO-213AA-2 package. Check if alternative manufacturers offer equivalent temperature-compensated variants with similar thermal characteristics and leakage current specifications.