Nexperia USA Inc. PDZ7.5BZ

Overview

PDZ7.5BZ from Nexperia is a single Zener diode designed for low-power voltage regulation in space-constrained SMD applications, with a nominal Zener voltage of 7.5 V at 5 mA, ±2 % tolerance, 60 Ω maximum differential resistance at 5 mA, 0.5 μA maximum reverse current at 5 V, and 4.0 mV/K temperature coefficient. It operates in general-purpose power supply rail clamping and reference circuits.

For engineers reviewing the PDZ7.5BZ datasheet, PDZ7.5BZ pinout, PDZ7.5BZ application, or PDZ7.5BZ equivalent, this device is selected for precision low-current voltage referencing, ESD-robust signal-level clamping, and compact board-level regulation where thermal resistance (R_th(j-a) = 340 K/W) and SOD323 footprint compatibility are critical design constraints.

Technical Context

This Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable reverse-biased breakdown across its cathode–anode terminals. Its hard breakdown knee and low leakage (≤0.5 μA at VR = 5 V) support accurate low-current biasing in analog sensor interfaces and microcontroller reset circuits.

Designed for surface-mount use on FR4 PCBs with standard tin-plated copper, it delivers 400 mW total power dissipation at 25 °C ambient, derating linearly above that temperature per the published curve. Junction-to-solder-point thermal resistance is 130 K/W, enabling predictable thermal performance in thermally isolated layouts.

Key Specifications

Pinout & Package

PDZ7.5BZ is housed in a SOD323 (SC-76) plastic surface-mount package measuring 1.8 mm × 1.35 mm × 0.95 mm, with cathode identified by a marking bar on the device body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B7V5 and MMSZ5233B, PDZ7.5BZ offers the best balance of tight ±2 % tolerance, low 0.5 μA leakage, and SOD323 compatibility-making it optimal for high-density, battery-sensitive, and precision-referenced designs where both accuracy and footprint are constrained.

Availability

PDZ7.5BZ is available at Aetrix Electronics and suitable for microcontroller reset circuits, ADC reference clamping, low-power sensor biasing, and USB-C VBUS monitoring requiring stable component supply and guaranteed long-term sourcing.

Supply support for PDZ7.5BZ 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 and industrial-grade components.

PDZ7.5BZ belongs to the PDZ-B series of low-power Zener diodes engineered specifically for compact, cost-effective voltage regulation and clamping in consumer, industrial, and computing applications where SMD scalability and parametric consistency are essential.

FAQ

What is the maximum continuous reverse current (I_Z) this diode can handle without exceeding its power rating?

At 25 °C ambient on an FR4 PCB, PDZ7.5BZ supports up to 53.3 mA continuous Zener current (400 mW ÷ 7.5 V), assuming nominal V_Z. Derating applies above 25 °C per the published curve; at 85 °C ambient, maximum I_Z drops to approximately 23.5 mA. Exceeding these limits risks thermal runaway or permanent degradation.

Can PDZ7.5BZ be used in series or parallel configurations for higher voltage or current capability?

No-Zener diodes like PDZ7.5BZ are not designed for parallel operation due to mismatched breakdown characteristics causing current hogging. Series connection is possible for higher voltage, but requires matched units and balancing resistors; however, Nexperia does not characterize or guarantee performance in such configurations. Use dedicated multi-Zener arrays or regulators instead.

How does the +4.0 mV/K temperature coefficient affect long-term stability in a 0–70 °C operating environment?

Over a 70 °C range, the Zener voltage shifts by +280 mV (4.0 mV/K × 70 K), resulting in a ~3.7 % deviation from nominal 7.5 V. This must be accounted for in reference-critical applications; compensation techniques (e.g., complementary NTC networks or digital correction) are recommended if sub-1 % stability is required across temperature.

Is PDZ7.5BZ suitable for protecting against electrostatic discharge (ESD) events?

PDZ7.5BZ is not rated or characterized as an ESD protection device. While it clamps at ~7.5 V, its non-repetitive peak reverse current rating is only 3.5 A (tp = 100 µs), far below typical IEC 61000-4-2 ESD surge requirements. Dedicated TVS diodes (e.g., PESD5V0S1BA) are required for certified ESD protection.