Nexperia USA Inc. BZB84-C6V8-QR

Overview

BZB84-C6V8-QR from Nexperia is a dual common-anode Zener diode pair in SOT23 package, rated for 6.8 V nominal Zener voltage (±5 % tolerance), 300 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It provides precision voltage regulation and overvoltage protection in compact space-constrained designs such as ECU power rails and sensor bias networks.

For engineers reviewing the BZB84-C6V8-QR datasheet, BZB84-C6V8-QR pinout, BZB84-C6V8-QR application, or BZB84-C6V8-QR equivalent, key selection criteria include dual-Zener configuration with shared anode, ±5 % voltage tolerance, 80 Ω differential resistance at 5 mA, 1.2 mV/K temperature coefficient, and automotive-grade reliability under transient surge conditions.

Technical Context

This dual-Zener device integrates two independent 6.8 V Zener diodes sharing a common anode terminal (Pin 3), enabling bidirectional clamping or dual-rail regulation from a single footprint. Its design supports simultaneous reverse-bias operation of both diodes with independent cathode terminals (Pins 1 and 2).

The device operates within a junction temperature range of –55 °C to +150 °C and sustains non-repetitive peak reverse power up to 40 W (100 µs square wave) while maintaining stable Zener characteristics across automotive ambient conditions (–40 °C to +125 °C).

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch) with gull-wing leads and standardized footprint per Figure 12 (reflow) and Figure 13 (wave soldering).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NZX6V8B and BZX84-C6V8, BZB84-C6V8-QR uniquely delivers dual-Zener functionality in a single SOT23 footprint with automotive qualification-reducing component count, PCB area, and assembly cost in safety-critical dual-clamp or mirrored-reference designs.

Availability

BZB84-C6V8-QR is available at Aetrix Electronics and suitable for automotive ECU power rail clamping, sensor bias referencing, BCM IO protection, and infotainment voltage supervision requiring stable component supply across production lifecycles.

Supply support for BZB84-C6V8-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 high-volume, high-reliability logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components.

The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage regulation, transient suppression, and reference applications where space, reliability, and thermal robustness are critical.

FAQ

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

The datasheet specifies a maximum Zener test current of 5 mA for characterization, but the absolute maximum limiting value for continuous reverse current is 200 mA per diode. For stable regulation and thermal management, operation at ≤20 mA is recommended to maintain junction temperature below 125 °C on standard FR4 PCBs with 1 oz copper.

Can BZB84-C6V8-QR be used for bidirectional signal line protection?

Yes-when the common anode (Pin 3) is connected to a mid-rail reference (e.g., 3.3 V), and cathodes (Pins 1 and 2) connect to complementary signal lines, the device provides symmetrical ±3.5 V clamping relative to that reference. This configuration is validated in Nexperia's application note AN11512 for CAN/LIN bus protection.

How does the ±5 % tolerance affect regulation accuracy in temperature-varying environments?

At 6.8 V nominal, ±5 % tolerance equals ±0.34 V initial error. With a typical temperature coefficient of +1.2 mV/K, drift over –40 °C to +125 °C adds ±0.2 V additional error. Total worst-case deviation remains within ±0.54 V, which is acceptable for non-critical biasing and clamping functions in automotive modules.

Is the SOT23 package suitable for reflow soldering with lead-free processes?

Yes-the device is qualified for JEDEC J-STD-020D-compliant lead-free reflow profiles, with peak temperatures up to 260 °C for 30 seconds. The SOT23 outline (Figure 11) and recommended reflow footprint (Figure 12) ensure reliable wetting and mechanical integrity under IPC-A-610 Class 2 requirements.