CMSZDA20V TR PBFREE

Overview

The CMSZDA20V TR PBFREE is a surface-mount dual common anode silicon zener diode from Central Semiconductor Corp. It operates within the CMSZDA2V4 through CMSZDA47V series, providing voltage regulation capabilities in a compact SOT-323 package. The device features a maximum power dissipation of 275 mW at 25°C ambient temperature and supports junction temperatures ranging from -65°C to +150°C. For the CMSZDA20V variant specifically, the nominal zener voltage is 20 V with a test current of 5.0 mA. Maximum zener impedance is 55 Ω at IZT and 225 Ω at IZK. The maximum reverse current is 0.05 µA at VR = 14 V, while the maximum zener current is 14 mA. The thermal resistance (θJA) is 455 °C/W, and the voltage temperature coefficient is 0.08 %/°C.

Feature Summary

• Dual configuration with common anode connection for space-efficient circuit design
• Silicon construction optimized for industrial, commercial, entertainment, and computer applications
• Lead-free plating option available via specific ordering suffix

Applications

• Voltage regulation in industrial control systems
• Signal clamping in commercial electronic equipment
• Reference voltage generation in computer hardware

Procurement Notes

Verify the exact part number against the manufacturer's official datasheet to ensure compatibility with your specific voltage requirements. Confirm that the PBFREE suffix indicates lead-free compliance if environmental regulations apply to your assembly process. Cross-reference the marking code Y7Y with the electrical characteristics table to validate the component identity upon receipt. Ensure storage conditions remain within the specified temperature range to maintain device integrity before installation.

Selection Notes

Select this component when a dual zener solution with a common anode is required for voltage reference or protection circuits. The SOT-323 package suits designs with limited board space constraints. Consider the 275 mW power dissipation limit and thermal resistance when determining heat management strategies. Verify that the 20 V nominal voltage aligns with the target regulation point and that the impedance specifications meet the circuit's noise and stability requirements.

Part Context

This component belongs to the CMSZDA series of dual common anode silicon zener diodes manufactured by Central Semiconductor Corp. The series spans voltages from 2.4 V to 47 V, offering various options for different regulation needs. All devices share the same SOT-323 surface-mount package and general structural characteristics, differing primarily in their specific zener voltage ratings and associated electrical parameters as defined in the series datasheet.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation. Engineers should consult manufacturer cross-reference guides or equivalent product lines from other suppliers to identify compatible replacements. Ensure any alternative device matches the SOT-323 footprint, pinout configuration, and electrical specifications such as voltage tolerance and power dissipation limits.