BZX84C20S-7

Overview

The BZX84C20S-7 is a dual surface mount Zener diode manufactured by Diodes Incorporated, housed in an SOT-363 package. It provides a nominal Zener voltage of 20 V with a tolerance range of 18.8 V to 21.2 V at a test current of 5 mA. The device features a maximum power dissipation of 200 mW and operates within a temperature range of -65°C to +150°C. Electrical specifications include a maximum Zener impedance of 55 Ω at IZT and 225 Ω at IZK, alongside a maximum reverse leakage current of 0.1 µA at 14 V. The typical voltage temperature coefficient is 14.4 mV/°C.

Feature Summary

• Dual configuration integrating two independent Zener diodes within a single ultra-small surface mount package for space-constrained designs.
• Planar die construction ensures robust performance and reliability under standard operating conditions.
• Lead-free and RoHS compliant manufacturing process supports environmentally conscious assembly requirements.

Applications

• Voltage reference circuits requiring stable dual potential levels.
• Clamping applications for protecting sensitive inputs from overvoltage transients.
• Biasing networks in low-power analog signal processing stages.

Procurement Notes

Verify the specific ordering suffix against official Diodes Incorporated documentation to confirm packaging details. The datasheet indicates that the -7-F suffix corresponds to tape and reel packaging containing 3000 units per reel. Confirm mechanical dimensions and marking codes align with your PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a dual Zener configuration is required in an SOT-363 footprint. Ensure the 20 V nominal voltage and 200 mW power rating suit the circuit's thermal and electrical demands. Verify that the 55 Ω impedance at the specified test current meets the application's dynamic resistance requirements.

Part Context

This part belongs to the BZX84C2V4S through BZX84C39S series of dual Zener diodes. The series offers various voltage options ranging from 2.4 V to 39 V, all sharing the same SOT-363 package and 200 mW power dissipation capability. The BZX84C20S-7 specifically addresses the need for a 20 V dual-channel solution within this standardized product family.

Replacement Considerations

Direct substitutes within the same series include other BZX84CxxS-7 variants with different voltage ratings but identical packaging and electrical characteristics. Cross-manufacturer replacements must match the SOT-363 outline dimensions and verify equivalent Zener voltage tolerances and power dissipation limits.