Nexperia USA Inc. PDZ3.6B-QZ

Overview

PDZ3.6B-QZ from Nexperia is a single Zener diode designed for low-power voltage regulation in space-constrained SMD applications, with a nominal Zener voltage of 3.6 V (min 3.60 V, max 3.85 V at I_Z = 5 mA), dynamic impedance of 500 Ω at 1 mA, and reverse leakage ≤ 5 μA at 1.0 V. It operates in automotive-grade AEC-Q101-qualified SOD323 package and delivers stable clamping in power supply reference and overvoltage protection circuits.

For engineers reviewing the PDZ3.6B-QZ datasheet, PDZ3.6B-QZ pinout, PDZ3.6B-QZ application, or PDZ3.6B-QZ equivalent, key selection criteria include Zener voltage tolerance (±2 %), low leakage at VR = 1.0 V, temperature coefficient (−2.4 mV/K), thermal resistance (R_th(j-a) = 340 K/W), and AEC-Q101 qualification for under-hood electronics.

Technical Context

This device functions as a two-terminal voltage reference diode operating in reverse breakdown, where Zener conduction begins near 3.6 V with sharp knee characteristics and minimal voltage drift over temperature. Its −2.4 mV/K temperature coefficient ensures predictable bias point shift across −65 °C to +150 °C ambient range.

The SOD323 package enables surface-mount integration with 130 K/W junction-to-solder-point thermal resistance, supporting continuous power dissipation up to 400 mW at T_amb ≤ 25 °C on FR4 PCB. Forward voltage remains ≤ 0.9 V at 10 mA, enabling bidirectional ESD-aware design when used with series resistors.

Key Specifications

Pinout & Package

SOD323 plastic surface-mounted package (SC-76); 2-terminal device with cathode identified by marking bar. Dimensions: 1.35 mm × 1.75 mm × 0.95 mm height; standard reflow footprint per Figure 9.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B3V6 and MMSZ4685, PDZ3.6B-QZ provides tighter voltage tolerance, lower leakage, and automotive qualification in the smallest SOD323 form factor-making it optimal for next-generation compact, safety-critical embedded systems.

Availability

PDZ3.6B-QZ is available at Aetrix Electronics and suitable for automotive sensor biasing, USB port overvoltage clamping, and industrial PLC input protection requiring stable component supply and AEC-Q101 traceability.

Supply support for PDZ3.6B-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, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade robustness.

PDZ3.6B-QZ belongs to the PDZ-B-Q series of AEC-Q101-qualified Zener diodes engineered specifically for voltage regulation and transient suppression in harsh-environment automotive and industrial control systems.

FAQ

What is the maximum continuous reverse current the PDZ3.6B-QZ can handle without damage?

The PDZ3.6B-QZ has no specified continuous reverse current rating; its safe operating limit is defined by power dissipation. At 25 °C ambient on FR4 PCB, it sustains up to 400 mW, corresponding to ~111 mA at 3.6 V. Derating applies above 25 °C per Fig. 1's 3.4 mW/°C slope, reaching zero at 140 °C junction temperature.

Does the PDZ3.6B-QZ support bidirectional ESD protection when used with a series resistor?

No-PDZ3.6B-QZ is a unidirectional Zener diode optimized for reverse-bias regulation. While forward conduction occurs below 0.9 V (IF = 10 mA), its 200 mA absolute maximum forward current and lack of symmetric clamping make it unsuitable as standalone bidirectional ESD protection. Use dedicated TVS diodes like PESD5V0S1BA for that function.

How does the −2.4 mV/K temperature coefficient affect circuit performance at 125 °C ambient?

At 125 °C ambient, junction temperature may reach ~140 °C depending on power dissipation and PCB layout. With −2.4 mV/K coefficient, V_Z shifts downward by ~276 mV from 25 °C value-resulting in ~3.32–3.57 V regulation. This must be accounted for in precision references; compensation networks or higher-V_Z diodes may be needed for stability.

Can PDZ3.6B-QZ replace PDZ3.6B in legacy designs without layout changes?

Yes-PDZ3.6B-QZ is a direct replacement for PDZ3.6B with identical SOD323 package, pinout, and electrical specifications. The "-QZ" suffix denotes enhanced AEC-Q101 qualification and updated manufacturing process, while maintaining full form-fit-function compatibility and same Zener voltage range (3.60–3.85 V).