Nexperia USA Inc. BZB84-B30-QR

Overview

BZB84-B30-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 30 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation. It provides dual-channel precision clamping in compact surface-mount form for space-constrained power rail protection.

For engineers reviewing the BZB84-B30-QR datasheet, BZB84-B30-QR pinout, BZB84-B30-QR application, or BZB84-B30-QR equivalent, key selection criteria include its dual-common-anode topology, 30 V ±2 % Zener voltage at 2 mA, non-repetitive peak reverse current of 1.0 A, and thermal resistance of 100 K/W junction-to-solder-point - critical for transient suppression in automotive ECUs and sensor interfaces.

Technical Context

This dual Zener diode integrates two independent 30 V Zener elements sharing a common anode terminal (Pin 3), enabling symmetrical bidirectional clamping or independent voltage reference generation. Its differential resistance is 300 Ω at I_Z = 2 mA, and temperature coefficient is +24.4 mV/K at same condition - indicating positive thermal drift optimized for stable mid-range voltage regulation.

The device operates within −55 °C to +150 °C ambient range and supports surge handling up to 40 W (100 µs square wave) per diode. Its 0.9 V forward voltage at 10 mA ensures low-loss conduction during forward bias, while 50 pF capacitance at 0 V reverse bias minimizes high-frequency signal coupling in noise-sensitive analog circuits.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with gull-wing leads and moisture sensitivity level 1 - compatible with standard reflow and wave soldering profiles per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5262BS and SMBZ5262B, BZB84-B30-QR uniquely delivers dual 30 V ±2 % Zeners in one AEC-Q101-qualified SOT23 package - reducing BOM count by 50 % and enabling compact, automotive-grade rail monitoring impossible with single-diode alternatives.

Availability

BZB84-B30-QR is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and power supply sequencing requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZB84-B30-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 focused on essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

BZB84-B30-QR belongs to the BZB84-Q series of AEC-Q101-qualified dual Zener diodes designed specifically for automotive voltage regulation, ESD protection, and precision reference applications where space, reliability, and thermal performance are critical.

FAQ

What is the maximum continuous forward current for BZB84-B30-QR?

The absolute maximum forward current is 200 mA per diode, specified at T_amb ≤ 25 °C on FR4 PCB with standard footprint. Derating is required above 25 °C ambient per the 417 K/W junction-to-ambient thermal resistance; at 85 °C ambient, maximum usable forward current drops to approximately 120 mA to maintain T_j ≤ 150 °C.

Can BZB84-B30-QR be used for bidirectional transient voltage suppression?

Yes - its dual cathode/common anode structure allows direct implementation as a bidirectional clamp: connect CA to GND and K1/K2 to protected nodes. This configuration suppresses ±30 V transients with matched clamping thresholds, verified for ISO 7637-2 Pulse 5a (load dump) and ISO 16750-2 tests per AEC-Q101 qualification.

How does the ±2 % tolerance affect voltage reference stability in precision circuits?

The ±2 % tolerance (29.4 V to 30.6 V at 2 mA) ensures worst-case reference deviation of ±0.6 V, which translates to ±2 % error in 30 V-based feedback loops. For higher accuracy, use external trimming resistors or pair with a low-drift op-amp buffer; the tight tolerance eliminates need for post-assembly calibration in most automotive sensor supply applications.

Is the SOT23 package lead-free and RoHS compliant?

Yes - BZB84-B30-QR uses lead-free terminations and complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The SOT23 package is qualified for Pb-free reflow soldering per JEDEC J-STD-020, with peak temperature tolerance up to 260 °C for 10 seconds.