CDLL978B/TR

Single Zener Diodes Overview

The CDLL978B/TR is a single Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 51 V with a tolerance of 5%. The device operates in the DO-213AA-2 (SOD-80) surface-mount package and dissipates up to 500 mW of power. Key electrical parameters include a maximum reverse leakage current of 500 nA, a Zener impedance of 21 ohms, and a test current of 7 mA. It supports a forward current of 200 mA and functions within an operating temperature range of -65 °C to +175 °C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation with a 51 V nominal breakdown voltage.
• Engineered for high-temperature reliability with operation up to 175 °C.
• Utilizes a compact SMD package suitable for automated surface-mount assembly.

Single Zener Diodes Applications

• Voltage reference circuits requiring precise potential levels.
• Over-voltage protection stages in electronic systems.
• Clamping applications in signal processing paths.

Single Zener Diodes Procurement Notes

Verify component authenticity through authorized Microchip distributors or direct channels. Confirm datasheet revisions match design requirements. Ensure ESD handling protocols are followed during storage and assembly. Validate package marking against official specifications to prevent counterfeit substitution.

Single Zener Diodes Selection Notes

Select this component when a 51 V Zener voltage is required in a small surface-mount footprint. Consider the 500 mW power dissipation limit and thermal management needs. Evaluate the 5% voltage tolerance against circuit precision requirements. Compare leakage current specifications if low-power standby modes are critical.

Single Zener Diodes Part Context

This part belongs to the CDLL series of single Zener diodes from Microchip Technology. It serves as a surface-mount alternative to axial-leaded equivalents like the 1N978B. The series is characterized by robust construction and wide temperature stability, supporting industrial and commercial electronics designs.

Single Zener Diodes Replacement Considerations

CDLL978B/TR is a parametric equivalent to the CDLL978B. Verify pinout compatibility and power ratings when substituting with other manufacturers' 51 V Zener diodes in the SOD-80 package.