CMSZDA4V7 TR PBFREE

Overview

The CMSZDA4V7 TR PBFREE is a dual unidirectional Zener diode array manufactured by Central Semiconductor Corp. It features two independent Zener elements configured in a common anode arrangement within a SOT-323 surface-mount package. The nominal Zener voltage is 4.7 V with a tolerance of ±5%. Each element supports a maximum power dissipation of 0.25 W (250 mW). The device operates reliably across a temperature range from -65 °C to +150 °C and complies with RoHS standards.

Feature Summary

• Dual unidirectional Zener configuration for compact circuit protection
• Common anode topology simplifies layout requirements
• High thermal stability suitable for demanding environments

Applications

• ESD protection for data lines
• Voltage reference circuits
• Transient voltage suppression

Procurement Notes

Verify the specific suffix against the manufacturer's current documentation to confirm packaging and compliance status. Ensure the ordering code matches the required reel quantity and lead-free specifications. Cross-reference the part number with official distributor catalogs to confirm availability and exact mechanical dimensions before finalizing procurement orders.

Selection Notes

Select this component when a dual Zener solution in a small outline package is required. Verify that the 4.7 V breakdown voltage aligns with the target circuit protection thresholds. Confirm that the SOT-323 footprint fits the available PCB space and that the 250 mW power rating meets the expected transient energy dissipation requirements.

Part Context

This part belongs to the CMSZDA series of dual Zener arrays from Central Semiconductor. These devices are designed to replace discrete single Zener diodes, reducing board space and assembly complexity. The series offers various voltage options within the same physical package format for standardized design integration.

Replacement Considerations

Direct replacements include other dual Zener arrays in SOT-323 packages with matching 4.7 V ratings and common anode configurations. Verify pinout compatibility and dynamic impedance characteristics before substitution.