Nexperia USA Inc. PDZ22BZ

Overview

PDZ22BZ from Nexperia is a single silicon Zener diode designed for low-power voltage regulation in space-constrained SMD applications, with a nominal Zener voltage of 22 V at 5 mA, ±2 % tolerance, 100 Ω maximum differential resistance at 5 mA, 25 μA maximum reverse current at 17 V, and 400 mW total power dissipation on FR4 PCB. It operates in general-purpose regulator and reference circuits requiring stable clamping in consumer, industrial, and power management subsystems.

For engineers reviewing the PDZ22BZ datasheet, PDZ22BZ pinout, PDZ22BZ application, or PDZ22BZ equivalent, this page delivers verified electrical parameters, thermal behavior, cathode/anode terminal mapping, SOD323 package dimensions, and direct alternatives for voltage reference design, overvoltage protection, and biasing networks - all confirmed against Nexperia's Rev. 5 product data sheet dated 21 December 2022.

Technical Context

This Zener diode functions as a two-terminal voltage reference device operating in reverse breakdown mode, with hard-knee breakdown characteristics and low leakage (≤25 μA at VR = 17 V). Its temperature coefficient is +18.4 mV/K at 5 mA, indicating positive drift with junction temperature rise - critical for precision biasing where thermal stability must be modeled.

The device exhibits 84 pF capacitance at 1 MHz and 0 V reverse bias, limiting high-frequency noise filtering use; its non-repetitive peak reverse current is 1.3 A (tp = 100 μs), supporting transient surge suppression in low-energy circuits when paired with series impedance.

Key Specifications

Pinout & Package

PDZ22BZ is housed in a SOD323 (SC-76) surface-mount plastic package measuring 1.8 mm × 1.35 mm × 0.95 mm, with cathode indicated by a marking bar on the top surface. The package supports reflow and wave soldering per Nexperia's recommended footprints (Fig. 9–10).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55C22 and MMSZ5247B, PDZ22BZ offers tighter ±2 % tolerance and smallest SOD323 footprint - ideal for miniaturized designs where regulation accuracy and board area are constrained, though with lower absolute power rating.

Availability

PDZ22BZ is available at Aetrix Electronics and suitable for USB power protection, ADC reference generation, DC-DC feedback networks, and microcontroller reset circuits requiring stable component supply and consistent parametric performance across production batches.

Supply support for PDZ22BZ 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 specializing in high-performance, energy-efficient logic, discrete, and MOSFET components, headquartered in Nijmegen, Netherlands.

PDZ22BZ belongs to the PDZ-B series of low-power Zener diodes engineered for compact, reliable voltage regulation in consumer, computing, and industrial SMD applications - emphasizing tight tolerance, small form factor, and robust surge handling.

FAQ

What is the maximum continuous reverse current PDZ22BZ can sustain at 22 V?

PDZ22BZ is not rated for continuous operation at its Zener voltage; it is specified for regulated operation at I_Z = 5 mA. At 22 V, sustained reverse current exceeds its power limit - maximum continuous reverse current is determined by P_tot/V_Z ≈ 18 mA at 25 °C ambient on FR4 PCB, assuming no derating.

Does PDZ22BZ support reflow soldering, and what profile is recommended?

Yes, PDZ22BZ is qualified for lead-free reflow soldering per J-STD-020. Nexperia specifies a maximum peak temperature of 260 °C, with time above 217 °C limited to 60–150 seconds. Figure 9 provides the recommended solder land pattern (0.6 mm pad width, 1.65 mm length) for optimal thermal and mechanical reliability.

How does the +18.4 mV/K temperature coefficient affect circuit accuracy over temperature?

A +18.4 mV/K coefficient means V_Z increases ~1.1 V over a 60 °C rise (e.g., 25 °C to 85 °C). For a 22 V reference, this yields ~5 % drift - acceptable for non-precision clamping but requires compensation (e.g., thermistor network or complementary diode) in high-accuracy references.

Can PDZ22BZ replace PDZ20B or PDZ24B in an existing design?

Direct substitution is possible only if the circuit tolerates ±2 V shift in clamping voltage and updated power dissipation calculations. PDZ20B (20 V) and PDZ24B (24 V) differ by ~9 % in nominal voltage - verify load current, thermal margin, and system trip thresholds before replacement to avoid over- or under-clamping.