BZB84-B3V9-QR

Overview

The Nexperia BZB84-B3V9-QR is a dual voltage regulator diode in the BZB84-Q series, housed in an SOT23 surface-mount package. It features a dual common anode configuration with two independent cathodes. The nominal Zener voltage is 3.9 V with a tolerance of ±2%. Key electrical parameters include a maximum reverse current of 90 μA at IZ=5 mA and a temperature coefficient ranging from -3.5 mV/K to 0 mV/K. The device supports a total power dissipation of 300 mW and operates within a junction temperature range of -55 °C to +150 °C.

Feature Summary

• Dual common anode configuration providing two independent regulation channels in a single compact package.
• Qualified according to AEC-Q101 standards for automotive application reliability.
• Offers tight voltage tolerance options, including the B-series ±2% variant.

Applications

• General voltage regulation functions
• Automotive electronic circuits

Procurement Notes

Verify the specific suffix 'QR' against the manufacturer's latest documentation to confirm reel packaging specifications and tape-and-reel dimensions. Ensure the selected component matches the required B-series tolerance grade rather than the C-series standard. Cross-reference the marking code VE% on the physical device to validate authenticity and correct voltage rating upon receipt.

Selection Notes

Select this part when a dual-channel voltage reference or protection scheme is required in space-constrained designs. The B-series designation indicates a tighter ±2% voltage tolerance compared to the standard C-series. Verify that the circuit design accommodates the dual common anode topology, which shares a single ground or supply return path for both diodes.

Part Context

This component belongs to the BZB84-Q series, a family of general-purpose Zener diodes designed for high-density surface-mount applications. The series covers a wide working voltage range from 2.4 V to 75 V. The BZB84-B3V9-QR specifically addresses low-voltage regulation needs within the automotive and industrial sectors using the standardized SOT23 footprint.

Replacement Considerations

Compatible substitutes within the same series include BZB84-C3V9-QR (±5% tolerance) and other BZB84-Bxxx-Q variants with different voltage ratings. Direct pin-compatible replacements must maintain the dual common anode configuration and SOT23 package dimensions.