Nexperia USA Inc. PDZ12B-QZ

Overview

PDZ12B-QZ from Nexperia is a single Zener diode designed for precision voltage regulation in low-power automotive and industrial circuits, with a nominal Zener voltage of 12.0 V (min 11.74 V, max 12.24 V at I_Z = 5 mA), ±2 % tolerance, 80 Ω maximum differential resistance, and AEC-Q101 qualification for under-hood applications.

For engineers reviewing the PDZ12B-QZ datasheet, PDZ12B-QZ pinout, PDZ12B-QZ application, or PDZ12B-QZ equivalent, this device is selected for stable reference generation in power supply feedback loops, overvoltage clamping in sensor interfaces, and ESD-robust voltage limiting in automotive control modules where compact SOD323 packaging and low leakage (<0.1 µA at V_R = 9.0 V) are critical.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its cathode-anode terminals. Its hard breakdown knee and low dynamic impedance (≤80 Ω at I_Z = 5 mA) ensure tight regulation under varying load currents, while its −8.4 mV/K temperature coefficient at I_Z = 5 mA enables predictable thermal drift compensation in analog sensing paths.

Designed for surface-mount assembly on FR4 PCBs, it delivers 400 mW total power dissipation at T_amb = 25 °C with thermal resistance R_th(j-a) = 340 K/W and R_th(j-sp) = 130 K/W, supporting reliable operation up to T_j = +150 °C in constrained automotive environments.

Key Specifications

Pinout & Package

SOD323 plastic surface-mounted package with 2 leads; marking bar denotes cathode terminal. Standard footprint per Nexperia Figure 9 (reflow) and Figure 10 (wave soldering).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C12 and MMSZ5242B, PDZ12B-QZ offers tighter voltage tolerance, lower dynamic impedance, AEC-Q101 qualification, and a smaller SOD323 footprint-making it the preferred choice for next-generation automotive and industrial designs requiring long-term stability and miniaturization.

Availability

PDZ12B-QZ is available at Aetrix Electronics and suitable for automotive power supply clamping, industrial sensor reference stabilization, and IoT node battery voltage monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PDZ12B-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 specializing in high-performance, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.

The PDZ-B-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation in automotive subsystems and industrial controls where precision, longevity, and thermal resilience are mandatory.

FAQ

What is the maximum reverse voltage PDZ12B-QZ can withstand before breakdown?

The PDZ12B-QZ has a nominal Zener voltage of 12.0 V with a guaranteed range of 11.74 V to 12.24 V at 5 mA test current. Its absolute maximum non-repetitive peak reverse voltage is not specified; however, continuous operation above 12.24 V will cause increasing reverse current per the V–I curve in Figure 6, and sustained overvoltage beyond power derating limits risks thermal failure.

Is PDZ12B-QZ compatible with lead-free reflow soldering processes?

Yes, PDZ12B-QZ is qualified for lead-free reflow soldering per JEDEC J-STD-020. Its SOD323 package supports peak temperatures up to 260 °C for ≤30 seconds, matching standard IPC-7095-compliant profiles. The recommended reflow footprint (Figure 9) uses 0.5 mm × 0.6 mm solder lands with 0.6 mm spacing.

How does the temperature coefficient affect regulation accuracy over temperature?

With a typical temperature coefficient of −8.4 mV/K at I_Z = 5 mA, PDZ12B-QZ's Zener voltage decreases by approximately 8.4 mV per Kelvin rise. Over a −40 °C to +125 °C junction range (ΔT = 165 K), this yields a total drift of ~1.39 V - a design consideration requiring compensation in high-accuracy references, but acceptable for clamping where absolute precision is secondary to threshold consistency.

Can PDZ12B-QZ be used in bidirectional ESD protection configurations?

No - PDZ12B-QZ is a unidirectional Zener diode optimized for reverse-bias regulation. While its forward voltage is 0.9 V at 10 mA, it lacks the symmetric breakdown characteristics and low clamping voltage required for bidirectional TVS applications. For ESD protection, dedicated bidirectional TVS diodes such as PESD5V0S1BA should be used instead.