Nexperia USA Inc. BZB84-B7V5-QR

Overview

BZB84-B7V5-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 7.5 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation. It delivers stable reference voltage in compact space-constrained circuits such as ECU power rail clamping and sensor biasing.

For engineers reviewing the BZB84-B7V5-QR datasheet, BZB84-B7V5-QR pinout, BZB84-B7V5-QR application, or BZB84-B7V5-QR equivalent, key selection criteria include dual-Zener topology, ±2 % V_Z tolerance at I_Z = 5 mA, 150 °C junction temperature rating, and SOT23 thermal resistance of 100 K/W to solder point.

Technical Context

This dual common-anode Zener diode integrates two independent 7.5 V regulation elements sharing a single anode terminal, enabling bidirectional clamping or dual-rail referencing from one footprint. Its differential resistance is 80 Ω at 5 mA, and temperature coefficient is +2.5 mV/K - indicating positive drift over temperature, critical for precision bias networks.

The device operates within −55 °C to +150 °C ambient range and sustains non-repetitive 40 W surge pulses (100 µs square wave) per diode. Thermal resistance from junction to solder point is 100 K/W, supporting reliable operation on standard FR4 PCBs without heatsinking.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, 3-terminal configuration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-Zener regulation applications.

Compared with BZB84-C7V5-Q, the BZB84-B7V5-QR offers tighter regulation for precision sensing; compared with MMBZ5233BS-7-F, it provides integrated dual functionality in half the board area and eliminates inter-device matching variance.

Availability

BZB84-B7V5-QR is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, and consumer audio power supplies requiring stable component supply with AEC-Q101 compliance and SOT23 space efficiency.

Supply support for BZB84-B7V5-QR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert specializing in high-performance logic, analog, and discrete components, with leadership in automotive-qualified parts and energy-efficient technologies.

The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation in harsh automotive environments and space-constrained industrial electronics.

FAQ

What is the maximum continuous reverse current I_Z for reliable long-term operation?

The datasheet specifies a maximum continuous Zener current of 200 mA per diode under limiting values. However, for stable 7.5 V regulation with minimal drift, operation at 5 mA (per diode) is recommended - delivering 37.5 mW dissipation and maintaining differential resistance below 80 Ω while staying well within thermal limits on standard FR4 PCBs.

Can BZB84-B7V5-QR be used in series or parallel configurations with other Zeners?

No - the common-anode architecture prevents safe parallel connection of multiple BZB84-B7V5-QR devices, as mismatched forward voltages would cause current imbalance. Series connection is also unsupported due to lack of isolated anodes; each device must operate independently with its own anode return path to avoid latch-up or thermal runaway.

How does the +2.5 mV/K temperature coefficient impact circuit performance at 125 °C ambient?

At 125 °C ambient (assuming 25 °C rise to 150 °C junction), the Zener voltage increases by approximately +250 mV from nominal 7.5 V - resulting in ~7.75 V output. This shift is fully characterized and repeatable, allowing designers to compensate using series resistors or calibration offsets in closed-loop systems like ADC references.

Is the SOT23 footprint compatible with standard reflow profiles for lead-free assembly?

Yes - Nexperia provides validated reflow soldering footprints (Fig. 12) for SOT23, specifying 0.6 mm solder land width and 0.7 mm solder paste stencil openings. The device supports JEDEC J-STD-020D peak temperatures up to 260 °C for 30 seconds, with no delamination or parametric shift observed in qualification testing.