Nexperia USA Inc. PDZ6.8B-QX

Overview

PDZ6.8B-QX from Nexperia is a single Zener diode designed for precision voltage regulation in low-power circuits, featuring a nominal Zener voltage of 6.65 V to 6.93 V at 5 mA, ±2 % tolerance, 400 mW total power dissipation, and SOD323 (SC-76) surface-mount package. It delivers hard breakdown knee, low dynamic impedance (60 Ω max at I_Z = 0.5 mA), and low leakage current (0.5 μA max at V_R = 5.5 V), enabling stable reference generation in automotive sensor signal conditioning.

For engineers reviewing the PDZ6.8B-QX datasheet, PDZ6.8B-QX pinout, PDZ6.8B-QX application, or PDZ6.8B-QX equivalent, this device is selected for its AEC-Q101 qualification, tight voltage tolerance, low thermal drift (SZ = +3.4 mV/K), and compatibility with high-density PCB layouts requiring minimal footprint and reflow-solderable packaging.

Technical Context

This Zener diode operates as a two-terminal voltage reference, conducting in reverse bias above its specified breakdown voltage while maintaining stable regulation across load and temperature variations. Its design emphasizes low dynamic impedance and sharp knee characteristics to minimize output variation under varying current conditions.

Thermal performance is defined by R_th(j-sp) = 130 K/W (junction-to-solder point) and R_th(j-a) = 340 K/W (junction-to-ambient), with derating starting at T_amb > 25 °C per Figure 1. Junction temperature is rated up to +150 °C, supporting operation in under-hood automotive environments.

Key Specifications

Pinout & Package

The PDZ6.8B-QX uses a 2-pin SOD323 plastic surface-mount package with cathode indicated by a marking bar on the body. The device is optimized for FR4 PCBs with standard reflow soldering footprints (0.6 mm pad width, 1.5 mm pad length).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C6V8 and MMSZ4687T1G, PDZ6.8B-QX uniquely balances AEC-Q101 compliance, ±2 % tolerance, and minimal SOD323 footprint-making it optimal for space-constrained automotive modules where regulation precision and reliability are jointly critical.

Availability

PDZ6.8B-QX is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial PLC input stages, USB-C power negotiation circuits, and medical wearable battery monitors requiring stable component supply with guaranteed long-term continuity.

Supply support for PDZ6.8B-QX 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 automotive-qualified components and energy-efficient solutions.

The PDZ-B-Q series targets automotive and industrial voltage reference needs, delivering AEC-Q101-compliant Zener diodes with tight tolerances and robust thermal performance in ultra-compact SMD packages.

FAQ

What is the maximum reverse current the PDZ6.8B-QX can handle in surge conditions?

The PDZ6.8B-QX supports a non-repetitive peak reverse current (I_ZSM) of 5.5 A for 100 µs square-wave pulses at T_amb = 25 °C, as specified in Table 8. This rating enables reliable transient suppression in automotive load-dump or inductive switching events without permanent degradation.

How does the +3.4 mV/K temperature coefficient affect circuit accuracy over temperature?

At I_Z = 5 mA, the +3.4 mV/K coefficient causes V_Z to increase by approximately 34 mV over a 10 °C rise. For a 6.8 V nominal device, this yields ~0.5 % drift per 10 °C, which is predictable and compensatable in precision references using matched-component techniques or software correction.

Is the SOD323 package compatible with standard reflow soldering profiles?

Yes-the PDZ6.8B-QX is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperatures up to 260 °C. Figure 9 specifies a recommended solder land pattern (0.6 mm × 1.5 mm pads, 0.5 mm spacing), and thermal resistance data assumes mounting on FR4 with single-sided copper and tin plating.

Can PDZ6.8B-QX be used in forward-bias applications such as ESD clamping?

Yes-it exhibits V_F ≤ 0.9 V at I_F = 10 mA and ≤1.1 V at 100 mA, making it suitable as a low-voltage forward clamp in bidirectional TVS configurations. However, its primary design intent and characterization are for reverse-bias Zener regulation, not dedicated ESD protection.