Nexperia USA Inc. BZX84W-B6V2X

Overview

BZX84W-B6V2X from Nexperia is a ±2% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 6.2 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and 150 °C maximum junction temperature. It provides precision voltage reference and overvoltage protection in compact board space-constrained circuits such as power supply feedback loops and sensor biasing networks.

For engineers reviewing the BZX84W-B6V2X datasheet, BZX84W-B6V2X pinout, BZX84W-B6V2X application, or BZX84W-B6V2X equivalent, key selection criteria include Zener voltage tolerance (±2%), differential resistance (150 Ω at 5 mA), temperature coefficient (+2.3 mV/K), reverse leakage (3 µA at 4 V), and thermal resistance (455 K/W).

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage regulation across varying load and temperature conditions. Its low differential resistance (150 Ω) ensures minimal output voltage variation under current changes, while its positive temperature coefficient (+2.3 mV/K) enables predictable drift compensation in multi-diode reference designs.

The device is optimized for surface-mount reflow assembly on FR4 PCBs with standard SOT323 footprint, supporting high-frequency decoupling due to low junction capacitance (200 pF at 0 V). It is not automotive-qualified and is intended for industrial, consumer, and computing applications requiring non-critical voltage stabilization.

Key Specifications

Pinout & Package

SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals; dimensions: 2.2 mm × 1.35 mm × 0.95 mm (L × W × H); standard reflow footprint per Figure 9.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84W-B6V2X, BZX84-C6V2 trades voltage accuracy for cost and MMSZ4687 trades miniaturization for thermal robustness-making the BZX84W-B6V2X optimal for space-constrained, precision-regulated 6.2 V nodes.

Availability

BZX84W-B6V2X is available at Aetrix Electronics and suitable for power supply feedback reference, sensor biasing network, and overvoltage clamp protection requiring stable component supply, consistent parametric performance, and SOT323-compatible manufacturing flow.

Supply support for BZX84W-B6V2X 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 discrete and logic devices, with leadership in advanced packaging and automotive-grade qualification.

The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, cost-effective voltage regulation and protection in consumer, industrial, and computing applications.

FAQ

What is the maximum continuous reverse current this Zener can handle at 6.2 V?

The BZX84W-B6V2X is rated for 200 mA maximum forward current, but in Zener operation it is characterized by reverse current. At 6.2 V, its typical operating current is 5 mA; absolute maximum reverse current is limited by power dissipation: I_Z(max) = P_tot/V_Z ≈ 44 mA at 25 °C ambient on FR4 PCB. Derating applies above 25 °C per R_th(j-a) = 455 K/W.

Can this diode be used in place of a 6.2 V TL431-based shunt regulator?

No-it lacks the active feedback and adjustable reference of TL431. The BZX84W-B6V2X provides fixed 6.2 V regulation with ±2% tolerance and 150 Ω dynamic impedance, suitable only for simple voltage clamping or coarse reference generation. For programmable, low-drift, or high-accuracy regulation, TL431 remains necessary.

Is the n.c. pin electrically isolated or thermally coupled to the die?

Pin 2 is internally not connected-no bond wire or metallization links it to the silicon die. It is electrically isolated and provides no thermal conduction path; therefore, it must remain unconnected on PCB and contributes no thermal relief. Thermal resistance is defined solely between junction and ambient via pins 1 and 3.

Does this part meet automotive AEC-Q200 requirements?

No. Per Nexperia's revision history (Table 10), the BZX84W series was changed to non-automotive qualification in Rev. 2 (Jan 2023). It is not tested or certified to AEC-Q200. For automotive use, Nexperia offers separate -Q qualified variants (e.g., BZX84W-Q series), which undergo extended temperature cycling, humidity testing, and failure analysis per AEC standards.