Nexperia USA Inc. PDZ4.7B-QZ

Overview

PDZ4.7B-QZ from Nexperia is a single Zener diode designed for precision voltage regulation in low-power circuits, with a nominal Zener voltage of 4.7 V (4.55–4.75 V at I_Z = 5 mA), ±2 % tolerance, 600 Ω dynamic impedance at 1 mA, and qualified to AEC-Q101 for automotive use in SOD323 (SC-76) surface-mount package.

For engineers reviewing the PDZ4.7B-QZ datasheet, PDZ4.7B-QZ pinout, PDZ4.7B-QZ application, or PDZ4.7B-QZ equivalent, this device supports stable reference generation in power supply feedback loops, overvoltage clamping in sensor interfaces, and ESD-robust voltage limiting in automotive body control modules where space-constrained SMD placement and thermal reliability are critical.

Technical Context

This Zener diode operates in reverse breakdown mode with a hard knee characteristic, enabling precise voltage clamping at low test currents (IZ = 0.5–5 mA). Its temperature coefficient of −1.4 mV/K at I_Z = 5 mA ensures predictable drift across automotive ambient ranges (−40 °C to +125 °C).

Thermal resistance from junction to solder point is 130 K/W, and total power dissipation is rated at 400 mW at T_amb ≤ 25 °C on FR4 PCB - derating linearly above that per Figure 1. Reverse leakage remains ≤2 µA at VR = 4.0 V, supporting low-quiescent-current designs.

Key Specifications

Pinout & Package

SOD323 (SC-76) plastic surface-mounted package with 2 leads; marking bar denotes cathode; optimized for reflow and wave soldering per Figures 9–10.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C4V7 and MMSZ4704T1G, PDZ4.7B-QZ provides tighter voltage tolerance (±2 % vs. ±5 %), lower leakage (<2 µA vs. >5 µA), and guaranteed AEC-Q101 qualification - making it the only choice for automotive-compliant voltage references requiring long-term stability and thermal resilience.

Availability

PDZ4.7B-QZ is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor signal conditioning, USB-C power monitoring, and smart lighting driver feedback loops requiring stable component supply with full traceability and lifecycle support.

Supply support for PDZ4.7B-QZ 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 logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and mobile markets.

PDZ-B-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation and clamping in harsh-environment automotive electronics where space, thermal performance, and long-term stability are critical.

FAQ

What is the maximum reverse voltage PDZ4.7B-QZ can withstand before breakdown?

The PDZ4.7B-QZ exhibits a sharp Zener breakdown between 4.55 V and 4.75 V at I_Z = 5 mA. Its absolute maximum non-repetitive peak reverse voltage is not specified, but the working voltage range is defined by its Zener characteristics - operation above 4.75 V at rated current triggers controlled conduction, not destructive failure. It is not rated for avalanche or transient surge handling beyond its 400 mW power limit.

Can PDZ4.7B-QZ be used in forward-biased configuration as a regular diode?

Yes - PDZ4.7B-QZ conducts forward current up to 200 mA continuously, with VF = 0.9 V at 10 mA and 1.1 V at 100 mA. Its forward characteristics meet standard silicon diode behavior, making it usable as a low-current rectifier or polarity protection element, though its primary design intent and characterization focus remain reverse-bias Zener regulation.

How does the −1.4 mV/K temperature coefficient affect circuit accuracy over temperature?

At I_Z = 5 mA, the Zener voltage shifts −1.4 mV per °C rise - resulting in ≈−0.14 V drift from −40 °C to +125 °C. This predictable, linear drift allows compensation in closed-loop systems or selection of complementary components; it is significantly lower than higher-voltage Zeners (>5.6 V), which exhibit positive coefficients and greater magnitude.

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

Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The SOD323 outline (Figure 8) and recommended solder land pattern (Figure 9) support peak temperatures up to 260 °C for ≤30 seconds. Thermal resistance data assumes tin-plated FR4 PCB with single-sided copper, confirming suitability for standard lead-free manufacturing without special process adjustments.