Nexperia USA Inc. PDZ11B-QZ

Overview

PDZ11B-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 11.0 V (min 10.78 V, max 11.22 V at I_Z = 5 mA), ±2 % tolerance, 60 Ω maximum differential resistance at 5 mA, and AEC-Q101 qualification for automotive use.

For engineers reviewing the PDZ11B-QZ datasheet, PDZ11B-QZ pinout, PDZ11B-QZ application, or PDZ11B-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 infotainment subsystems where compact SOD323 packaging and low leakage (<0.1 µA at V_R = 9.1 V) are critical.

Technical Context

This Zener diode operates in reverse breakdown to maintain a stable reference voltage under varying load and temperature conditions. Its hard breakdown knee and low dynamic impedance ensure minimal voltage deviation across current changes from 0.5 mA to 10 mA.

Thermal resistance from junction to solder point is 130 K/W, enabling reliable operation up to +150 °C junction temperature. The −7.4 mV/K temperature coefficient at I_Z = 5 mA indicates moderate negative drift, requiring compensation only in high-precision analog references.

Key Specifications

Pinout & Package

PDZ11B-QZ 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 device top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C11 and MMSZ5240B, PDZ11B-QZ delivers tighter voltage control (±2 % vs. ±5 %), automotive qualification, and smaller SOD323 footprint-making it optimal for next-generation ADAS and body control modules where space, precision, and qualification are non-negotiable.

Availability

PDZ11B-QZ is available at Aetrix Electronics and suitable for automotive power management, industrial sensor signal conditioning, and telecom interface regulation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PDZ11B-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 focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.

The PDZ-B-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage reference and clamping in harsh automotive environments where long-term stability and surge resilience are mandatory.

FAQ

What is the maximum continuous reverse current the PDZ11B-QZ can sustain without degradation?

The PDZ11B-QZ has no specified continuous reverse current rating; its operation relies on controlled Zener current limited externally by a series resistor. Under normal regulation, I_Z is maintained between 0.5 mA and 10 mA per datasheet characteristics. Sustained current above 10 mA requires derating per the 400 mW power limit and thermal resistance curve to avoid exceeding 150 °C junction temperature.

How does the −7.4 mV/K temperature coefficient affect circuit accuracy over −40 °C to +125 °C?

Over that 165 °C range, the Zener voltage shifts approximately −1.22 V (−7.4 mV/K × 165 K), resulting in a final V_Z of ~9.8 V at +125 °C. This 11 % drift must be accounted for in precision references; however, the device remains effective for clamping where absolute accuracy is secondary to threshold consistency and speed.

Can PDZ11B-QZ replace PDZ10B-Q in an existing design without layout changes?

Yes-both share identical SOD323 package, pinout, and thermal footprint. The 11 V vs. 10 V Zener voltage change requires verification of downstream component voltage ratings and loop stability, but no PCB modification is needed. The tighter ±2 % tolerance of PDZ11B-QZ may improve overall system margin compared to PDZ10B-Q's ±2 % spec.

Is the 3.0 A non-repetitive peak current rating tested per JEDEC standards?

Yes-the 3.0 A rating at t_p = 100 µs is validated per JEDEC JESD22-A115 (surge test) and aligns with AEC-Q101 stress test requirements for non-repetitive avalanche energy. It reflects actual device capability under square-wave pulses with 25 °C ambient preconditioning, not theoretical calculation.