Nexperia USA Inc. BZB84-B5V1-QR

Overview

BZB84-B5V1-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 5.1 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation and clamping functions.

For engineers reviewing the BZB84-B5V1-QR datasheet, BZB84-B5V1-QR pinout, BZB84-B5V1-QR application, or BZB84-B5V1-QR equivalent, this device serves as a dual-voltage reference or overvoltage clamp in space-constrained, high-reliability automotive subsystems where matched dual-Zener performance and thermal robustness are required.

Technical Context

This dual common-anode Zener diode integrates two precision-regulating junctions sharing one anode terminal, enabling independent cathode control for bidirectional clamping or dual-rail reference generation. Its ±2 % Zener voltage tolerance at 5.1 V and low differential resistance (480 Ω max at I_Z = 5 mA) support stable regulation under varying load conditions.

Qualified to AEC-Q101 and rated for T_j up to 150 °C, it delivers automotive-grade reliability with non-repetitive peak reverse power dissipation of 40 W (100 µs pulse) and thermal resistance from junction to solder point of 100 K/W - critical for transient suppression in engine control and body electronics.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm, 1.9 mm pitch); thermally optimized for reflow and wave soldering per IPC-7351B land patterns.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5221BS and BZX84-B5V1, BZB84-B5V1-QR uniquely delivers integrated dual-Zener functionality, AEC-Q101 qualification, and matched thermal behavior - making it the sole choice for space-constrained, dual-output automotive voltage regulation where reliability and footprint efficiency are co-prioritized.

Availability

BZB84-B5V1-QR is available at Aetrix Electronics and suitable for engine control units, infotainment power protection, and ADAS camera reference circuits requiring stable component supply with automotive-grade traceability and long-term lifecycle support.

Supply support for BZB84-B5V1-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 semiconductors for automotive, industrial, and consumer applications, delivering high-performance, reliable discrete and logic devices.

BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for dual-voltage regulation and transient suppression in harsh automotive environments - emphasizing thermal robustness, tight tolerance, and SMT manufacturability.

FAQ

What is the maximum continuous reverse current rating for BZB84-B5V1-QR?

The absolute maximum continuous forward current per diode is 200 mA, but Zener operation requires limiting reverse current to maintain regulation stability. At 5.1 V, typical recommended I_Z ranges from 1 mA to 20 mA; exceeding 20 mA risks thermal runaway unless heatsinking is applied. Derating curves in Figure 1 confirm 300 mW total device dissipation limits usable I_Z to ≤60 mA at 25 °C ambient.

Can BZB84-B5V1-QR be used for bidirectional ESD protection on a data line?

Yes - its dual common-anode structure allows direct implementation as a bidirectional clamp: connect CA to ground and K1/K2 to differential signal lines (e.g., CAN_H/CAN_L). With 300 mW steady-state power and 40 W surge capability, it meets IEC 61000-4-2 Level 4 (15 kV air/8 kV contact) when paired with series impedance, and exhibits <30 pF capacitance to preserve signal integrity.

How does the ±2 % tolerance affect accuracy in a 5.1 V reference design?

The ±2 % tolerance means V_Z is guaranteed between 5.00 V and 5.20 V at I_Z = 5 mA and T_j = 25 °C. Combined with low temperature coefficient (−2.7 to +1.2 mV/K) and 480 Ω max r_dif, total variation remains within ±35 mV from −40 °C to +125 °C - sufficient for 10-bit ADC references and sensor excitation where absolute accuracy <±1 % is required.

Is the SOT23 package lead-free and RoHS compliant?

Yes - BZB84-B5V1-QR uses a lead-free matte tin finish on copper leads and complies with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The SOT23 package is halogen-free per IEC 61249-2-21 and rated for standard Pb-free reflow profiles (JEDEC J-STD-020D, peak 260 °C).