BZB84-B4V7-QR

Overview

The Nexperia BZB84-B4V7-QR is a dual voltage regulator diode in the BZB84-Q series, housed in an SOT-23 (TO-236AB) surface-mount package. It features a dual common anode configuration with two independent cathodes. The nominal Zener voltage is 4.7 V with a ±2% tolerance (Series B). Key electrical parameters include a maximum total power dissipation of 300 mW, a forward voltage of 0.9 V at 10 mA, and a reverse leakage current of 500 nA at 5 mA test current. The device operates within a junction temperature range of -55 °C to +150 °C and is qualified according to AEC-Q101 for automotive applications.

Feature Summary

• Dual common anode configuration providing two independent regulation channels in a single compact package.
• Qualified according to AEC-Q101 standards, making it suitable for demanding automotive electronic environments.
• High non-repetitive peak reverse power dissipation capability of up to 40 W for transient protection scenarios.

Applications

• General voltage regulation functions in compact circuit designs.
• Automotive electronics requiring AEC-Q101 qualified discrete semiconductors.
• Over-voltage protection circuits utilizing the high surge power handling capability.

Procurement Notes

Verify the specific ordering suffix matches the required tolerance grade, as the 'B' designation indicates a tighter ±2% voltage tolerance compared to the standard 'C' series. Confirm that the SOT-23 footprint aligns with the PCB design guidelines provided in the datasheet's soldering section. Ensure the application environment remains within the specified ambient and junction temperature limits to maintain reliability.

Selection Notes

Select this component when a dual-channel voltage reference or regulation is needed in a minimal footprint. The B-series offers higher precision than the C-series but requires careful consideration of the 500 nA reverse leakage current at the 4.7 V rating. Compare thermal resistance values against the expected power dissipation to ensure the junction temperature stays below 150 °C under continuous operation conditions.

Part Context

This part belongs to the Nexperia BZB84-Q series, which comprises 74 types of dual Zener diodes covering nominal voltages from 2.4 V to 75 V. All variants share the same SOT-23 plastic package and dual common anode topology. The series is designed to support high-density circuit designs where space constraints are critical, offering both standard and automotive-grade options.

Replacement Considerations

Direct functional substitutes within the same family include BZB84-C4V7-QR (±5% tolerance) or other BZB84-Q series parts with identical pinout. Cross-package replacements like the single-diode BZX84 series require circuit redesign due to different pin configurations and lower power ratings.

FAQ

What is the marking code for the BZB84-B4V7-QR?

The marking code for the BZB84-B4V7-QR is VG%.

How does the BZB84-B4V7-QR differ from the BZB84-C4V7-QR?

The primary difference is the voltage tolerance; the B-series (BZB84-B4V7-QR) has a ±2% tolerance, while the C-series (BZB84-C4V7-QR) has an approximate ±5% tolerance.

What is the maximum non-repetitive peak reverse power dissipation?

The maximum non-repetitive peak reverse power dissipation is 40 W per diode, measured under specific pulse conditions (tp ≤ 300 μs).