BZX84C3V9S-7

Overview

The BZX84C3V9S-7 is a dual independent surface mount Zener diode array manufactured by Diodes Incorporated. It features planar die construction within an SOT-363 package, providing two isolated voltage regulation channels in a compact form factor. The nominal Zener voltage is 3.9 V with a tolerance of ±5%, tested at a current of 5 mA. Maximum power dissipation is rated at 200 mW, supported by a thermal resistance of 625 °C/W. Electrical characteristics include a maximum Zener impedance of 90 Ω and a reverse leakage current of 3 µA at 1 V. The device operates across a temperature range of -65°C to +150°C.

Feature Summary

• Dual independent Zener channels integrated into a single ultra-small surface mount package for space-constrained designs.
• Planar die construction ensures stable voltage regulation and robust performance under varying thermal conditions.
• Lead-free and RoHS compliant manufacturing process utilizing matte tin finish plating over an Alloy 42 leadframe.

Applications

• Voltage reference circuits requiring dual independent supply rails.
• Clamping and protection stages for sensitive input/output lines.
• Biasing networks in portable electronic devices and mobile communication equipment.

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging configuration. The standard designation typically indicates tape and reel packaging containing 3,000 units per reel. Confirm that the component meets required environmental standards such as RoHS compliance and moisture sensitivity level classifications before finalizing procurement specifications.

Selection Notes

Select this component when dual independent voltage regulation is required within strict spatial limitations. The SOT-363 package offers a low profile suitable for automated assembly processes. Ensure the application voltage does not exceed the maximum ratings and consider the thermal resistance value for heat dissipation requirements in enclosed environments.

Part Context

This part belongs to the BZX84C series of dual Zener diode arrays produced by Diodes Incorporated. The series spans various voltage options from 2.4 V to 39 V, all sharing the same physical footprint and electrical architecture. This specific model provides a 3.9 V regulation point, fitting within the lower voltage range of the product family designed for precision applications.

Replacement Considerations

Direct substitutes include variants with updated ordering suffixes such as BZX84C3V9S-7-F, which maintains identical electrical parameters and mechanical dimensions. Verify pinout compatibility and ensure any alternative components meet the same thermal and voltage specifications.

FAQ

What is the marking code for the BZX84C3V9S?

The product type marking code for the BZX84C3V9S is KZG, followed by the date code marking.

How is the polarity defined for the SOT-363 package?

Pin 1 is Anode A1, Pin 2 is Cathode C1, Pin 3 is Anode A2, Pin 4 is Cathode C2, Pin 5 is Cathode NC (No Connect), and Pin 6 is Anode NC (No Connect).

What is the typical total capacitance at 1 MHz?

The datasheet provides a graph showing typical total capacitance versus nominal Zener voltage; for 3.9 V, it falls between 10 pF and 100 pF depending on reverse bias voltage.