CS55DZ TIN/LEAD

Overview

The CS55DZ is a silicon Zener diode manufactured by Central Semiconductor Corp, designed for voltage regulation and reference applications. It utilizes the DO-201 axial leaded package to support through-hole mounting configurations. The device specifies a nominal Zener voltage of 56 V with a 5% tolerance at a test current of 4.5 mA. It features a maximum power dissipation of 5 W at an ambient temperature of 75°C, de-rating linearly above this threshold. Key electrical characteristics include a maximum reverse leakage current of 5 µA at 48 V and a maximum Zener impedance of 30 Ω at the rated test current. The component operates within a junction temperature range of -65°C to +175°C and supports a peak forward surge current of 40 A for 8.3 ms.

Feature Summary

• High thermal stability with a maximum operating junction temperature of 175°C
• Robust mechanical construction in a glass-passivated DO-201 axial package
• Low leakage current characteristics suitable for precision reference circuits

Applications

• Voltage regulation in high-power DC power supplies
• Overvoltage protection circuits requiring robust surge handling
• Precision voltage reference sources in industrial instrumentation

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm compliance with RoHS directives and material composition requirements. Ensure that the procurement documentation explicitly states the lead content status, as the TIN/LEAD designation indicates non-rohs compliant materials. Confirm the package type matches the required PCB footprint and verify the manufacturing date code to ensure component freshness and reliability standards are met for the intended application environment.

Selection Notes

Select this component when a stable 56 V reference is required in high-power environments. Evaluate the thermal management strategy to maintain junction temperatures below 175°C under full load conditions. Compare the 30 Ω impedance specification against circuit sensitivity requirements to ensure adequate regulation performance. Verify that the 5 W power rating aligns with the expected dissipation in the final assembly, considering ambient temperature derating curves provided in the technical specifications.

Part Context

This part belongs to the CZ535x series of high-power Zener diodes from Central Semiconductor. The series offers various voltage options within the DO-201 package, providing designers with standardized solutions for power regulation tasks. The CS55DZ specifically addresses the 56 V segment of this portfolio, sharing common mechanical and thermal characteristics with other members of the family while differing in breakdown voltage parameters.

Replacement Considerations

Cross-reference with equivalent parts from manufacturers such as Vishay or Littelfuse offering 56 V Zener diodes in the DO-201 package. Verify that substitute components match the 5 W power rating, 5% voltage tolerance, and maximum Zener impedance specifications. Ensure the replacement part supports the same operating temperature range and physical dimensions for direct board compatibility.