Nexperia USA Inc. PDZ6.8BZ

Overview

PDZ6.8BZ from Nexperia is a single silicon Zener diode optimized for low-power voltage regulation in space-constrained SMD designs, featuring a nominal Zener voltage of 6.65–6.93 V at 5 mA, dynamic impedance ≤40 Ω, reverse leakage ≤0.5 μA at 5 V, temperature coefficient +3.4 mV/K, and total power dissipation up to 400 mW in SOD323 package.

For engineers reviewing the PDZ6.8BZ datasheet, PDZ6.8BZ pinout, PDZ6.8BZ application, or PDZ6.8BZ equivalent, this device serves as a precision shunt reference in power supply feedback loops, overvoltage clamping circuits, and low-current biasing networks where tight voltage tolerance (±2%), hard breakdown knee, and stable thermal performance are required.

Technical Context

This Zener diode operates in reverse-biased breakdown mode with a well-defined, sharp knee at I_Z = 5 mA, enabling accurate voltage referencing without external bias circuitry. Its low differential resistance (≤40 Ω) ensures minimal output voltage variation under load changes.

Designed for surface-mount use on FR4 PCBs with standard footprint, it delivers thermal resistance of 340 K/W (junction-to-ambient) and 130 K/W (junction-to-solder point), supporting reliable operation up to T_j = +150 °C and storage down to −65 °C.

Key Specifications

Pinout & Package

PDZ6.8BZ is housed in a miniature SOD323 (SC-76) plastic surface-mount package measuring 1.8 × 1.35 × 0.95 mm, with cathode indicated by a marking bar on the device body. The package is optimized for reflow and wave soldering using standardized footprints per Nexperia's recommended land patterns.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B6V8 and MMSZ4687T1G, PDZ6.8BZ offers superior regulation stability (±2 %, r_dif ≤40 Ω) in the smallest footprint (SOD323), making it optimal for high-density power management ICs and portable electronics where precision and space are co-constrained.

Availability

PDZ6.8BZ is available at Aetrix Electronics and suitable for power supply feedback regulation, overvoltage clamp protection, and bias voltage generation requiring stable component supply across industrial, consumer, and IoT design cycles.

Supply support for PDZ6.8BZ 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and robustness for mass-market electronics.

PDZ6.8BZ belongs to the PDZ-B series of low-power Zener diodes engineered specifically for precision voltage reference and clamping in space-constrained SMD applications across consumer, computing, and industrial power systems.

FAQ

What is the maximum continuous reverse current the PDZ6.8BZ can handle at its rated Zener voltage?

The PDZ6.8BZ is rated for continuous Zener current up to 60 mA at 25 °C ambient, derived from its 400 mW power rating and nominal 6.8 V breakdown. At higher temperatures, derating applies per the published power curve-e.g., ~240 mW at 70 °C ambient on FR4 PCB-limiting sustainable I_Z to approximately 35 mA.

How does the +3.4 mV/K temperature coefficient affect long-term voltage stability in a 0–85 °C operating range?

With a +3.4 mV/K coefficient, PDZ6.8BZ exhibits a total drift of +289 mV across an 85 °C span (from 25 °C to 110 °C junction), translating to ~+4.2 % deviation from nominal 6.8 V. This is fully characterized and repeatable, enabling system-level compensation in closed-loop regulators or acceptable for non-critical clamping where absolute accuracy is secondary to repeatability.

Can PDZ6.8BZ be used in series or parallel configurations for higher voltage or current handling?

Series connection is feasible for higher reference voltages (e.g., two PDZ6.8BZ yield ~13.6 V), but requires matched units to avoid current imbalance; parallel use is not recommended due to negative thermal feedback and unequal current sharing. For higher power, Nexperia's PDZ10B or PDZ12B variants are preferred alternatives with identical package and tighter matching.

Is the SOD323 package compatible with standard reflow profiles for lead-free assembly?

Yes-PDZ6.8BZ meets JEDEC J-STD-020D moisture sensitivity level 1 and is qualified for standard Pb-free reflow profiles (peak 260 °C, 10–30 sec above 217 °C). Its thermal resistance and package construction ensure no delamination or parametric shift when processed per Nexperia's recommended solder land pattern and stencil aperture guidelines.