Nexperia USA Inc. PDZ5.1BF

Overview

PDZ5.1BF 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 5.1 V at 5 mA, ±2 % tolerance, 250 Ω typical dynamic impedance at 5 mA, 2 µA maximum reverse leakage at 1 V, and 400 mW total power dissipation on FR4 PCB.

For engineers reviewing the PDZ5.1BF datasheet, PDZ5.1BF pinout, PDZ5.1BF application, or PDZ5.1BF equivalent, this device is selected for precision clamping, reference voltage generation, and overvoltage protection where tight voltage stability, low leakage, and hard breakdown knee are required in consumer, industrial, and automotive-adjacent circuits.

Technical Context

The PDZ5.1BF operates as a two-terminal voltage reference diode with cathode-anode polarity, exhibiting a sharp, hard breakdown knee and minimal voltage hysteresis. Its Zener voltage is specified at I_Z = 5 mA, with temperature coefficient of +0.3 mV/K - indicating near-zero thermal drift around room temperature.

It delivers stable regulation under low-current conditions (IZ ≥ 0.5 mA), supports non-repetitive surge currents up to 5.5 A (tp = 100 µs), and maintains <2 µA reverse current at VR = 1 V - enabling use in battery-powered and low-quiescent systems.

Key Specifications

Pinout & Package

PDZ5.1BF is housed in a SOD323 (SC-76) surface-mount plastic package measuring 1.8 × 1.35 × 0.95 mm, with gull-wing leads and cathode indicated by a marking bar on the body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55C5V1 and MMSZ5231B, PDZ5.1BF offers tighter ±2 % tolerance, smaller SOD323 footprint, lower leakage, and superior dynamic impedance - making it optimal for modern miniaturized, low-power, high-accuracy voltage reference roles.

Availability

PDZ5.1BF is available at Aetrix Electronics and suitable for USB protection circuits, microcontroller reset networks, industrial sensor excitation, and portable battery monitoring systems requiring stable component supply with consistent parametric performance across production lots.

Supply support for PDZ5.1BF 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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands, with manufacturing in Europe and Asia.

PDZ5.1BF belongs to the PDZ-B series of low-power Zener diodes engineered for general-purpose voltage regulation in compact SMD designs - emphasizing tight tolerance, low leakage, and hard breakdown for cost-sensitive consumer and industrial applications.

FAQ

What is the maximum reverse current the PDZ5.1BF can handle in surge conditions?

The PDZ5.1BF supports a non-repetitive peak reverse current (I_ZSM) of 5.5 A at t_p = 100 µs and T_amb = 25 °C, as defined in Table 5 of the datasheet. This rating applies only to short-duration transients; sustained reverse current must remain within the 5 mA nominal Zener test condition to maintain regulation accuracy and prevent thermal runaway.

Can PDZ5.1BF be used in forward-biased mode as a standard diode?

Yes - the PDZ5.1BF exhibits a forward voltage of ≤0.9 V at 10 mA and ≤1.1 V at 100 mA, per Table 7. It functions as a standard silicon rectifier in forward bias, though its primary design intent and characterization focus is reverse-bias Zener operation; forward conduction is secondary and not optimized for high-speed switching.

How does the +0.3 mV/K temperature coefficient affect regulation accuracy over temperature?

A +0.3 mV/K coefficient means V_Z increases by ~0.3 mV per Kelvin rise in junction temperature. Over a 100 °C range (−40 °C to +60 °C), this contributes ~30 mV drift - well within the ±2 % initial tolerance band (±102 mV). The net effect is improved stability near room temperature, with minimal net drift across typical industrial operating ranges.

Is PDZ5.1BF automotive-qualified?

No - the PDZ-B series, including PDZ5.1BF, is explicitly designated as non-automotive qualified per Nexperia's legal disclaimers. It is not tested to AEC-Q101 or subjected to automotive-grade qualification stress profiles. For automotive applications, engineers must select parts explicitly marked "AEC-Q101 qualified" and verify compliance with relevant vehicle subsystem requirements.