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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. PDZ3.3BF

Name: PDZ3.3BF
Brand: Nexperia USA Inc.
SKU: PDZ3.3BF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PDZ3.3BF

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: PDZ3.3BF.pdf

Description:: DIODE ZENER 3.3V 400MW SOD323

Quantity:: RFQ Add To RFQ list

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Inventory:9,957

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Product details

Overview

PDZ3.3BF from Nexperia is a single silicon Zener diode designed for low-power voltage regulation in surface-mounted applications, with a nominal Zener voltage of 3.32 V to 3.53 V at I_Z = 5 mA, ±2 % tolerance, 95 Ω maximum differential resistance, and 5 µA maximum reverse current at V_R = 1 V. It operates in the SOD323 (SC-76) package and delivers stable reference performance in compact power management circuits.

For engineers reviewing the PDZ3.3BF datasheet, PDZ3.3BF pinout, PDZ3.3BF application, or PDZ3.3BF equivalent, this device is selected for precision low-voltage clamping, biasing, and overvoltage protection where tight voltage tolerance, low leakage, and hard breakdown knee are required in space-constrained PCB layouts.

Technical Context

This Zener diode functions as a two-terminal voltage reference element operating in reverse breakdown mode, with specified Zener voltage defined at 5 mA test current and characterized across junction temperatures from 25 °C to 150 °C. Its temperature coefficient is −2.4 mV/K, indicating predictable negative drift with rising temperature.

The device exhibits a hard breakdown knee and low dynamic impedance (≤95 Ω), enabling stable regulation under varying load conditions. Thermal resistance from junction to ambient is 340 K/W on standard FR4 PCB, supporting reliable operation up to +150 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.32 V to 3.53 V at I_Z = 5 mA - defines precise clamping threshold for 3.3 V rail protection
Differential Resistance (r_dif)	≤95 Ω at I_Z = 5 mA - ensures minimal output voltage variation under load changes
Reverse Current (I_R)	≤5 µA at V_R = 1 V - guarantees low standby power loss in always-on bias networks
Forward Voltage (V_F)	≤0.9 V at I_F = 10 mA - enables efficient forward conduction during transient polarity reversal
Total Power Dissipation (P_tot)	400 mW at T_amb ≤ 25 °C - sets thermal design boundary for PCB copper area and derating curve use
Thermal Resistance (R_th(j-a))	340 K/W on FR4, single-sided copper - informs heatsinking requirements for sustained operation
Temperature Coefficient (S_Z)	−2.4 mV/K at I_Z = 5 mA - quantifies voltage drift per degree, critical for temp-stable references

Pinout & Package

PDZ3.3BF is housed in a plastic surface-mounted SOD323 (SC-76) package measuring 1.8 mm × 1.35 mm × 0.95 mm, with gull-wing leads optimized for reflow soldering on standard FR4 PCBs. The cathode is marked by a visible bar on the package top surface.

Pin/Terminal	Circuit Role	Design Meaning
1 (K)	Cathode	Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs
2 (A)	Anode	Connected to ground or lower-potential rail; completes reverse-bias path for regulation

Key Features

Feature	Design Value
Low dynamic impedance	≤95 Ω at 5 mA enables tight regulation in feedback paths and reference dividers
Hard breakdown knee	Sharp transition into conduction improves noise immunity and reduces regulation hysteresis
±2 % voltage tolerance	Reduces need for post-production trimming in 3.3 V system-level voltage monitoring circuits
Low leakage current	≤5 µA at 1 V reverse bias minimizes quiescent current in battery-backed or energy-harvesting nodes
SOD323 footprint	0.95 mm height and 1.35 mm width support high-density layout in portable and IoT edge devices

Applications

USB Port Overvoltage Protection

Microcontroller Reset Circuit

Use Scenario: Clamping transient surges on USB VBUS lines during hot-plug events or ESD discharge.

IC Role / Device Role / Timing Role: Zener acts as shunt regulator to clamp voltage above 3.6 V while diverting excess current to ground.

Use Value: Prevents damage to downstream USB PHY ICs by limiting peak voltage to ≤3.6 V with <5 µA leakage at 1 V.

Use Scenario: Generating a clean, temperature-compensated reset threshold for 3.3 V microcontrollers.

IC Role / Device Role / Timing Role: Provides stable 3.32–3.53 V reference to RC-based reset generator or supervisor IC input.

Use Value: Ensures deterministic reset assertion across −40 °C to +85 °C due to −2.4 mV/K coefficient and hard knee.

Low-Power Sensor Biasing

ADC Reference Stabilization

Use Scenario: Supplying stable bias voltage to analog sensor front-ends in battery-powered environmental monitors.

IC Role / Device Role / Timing Role: Zener establishes fixed 3.3 V reference point for op-amp gain-setting resistors and sensor excitation.

Use Value: Maintains sensor accuracy within ±0.5 % full-scale error over temperature thanks to ≤95 Ω r_dif and low leakage.

Use Scenario: Improving DC stability of external ADC reference inputs in mixed-signal data acquisition modules.

IC Role / Device Role / Timing Role: Shunts reference node fluctuations caused by digital switching noise on shared 3.3 V rails.

Use Value: Reduces reference ripple by >20 dB at 100 kHz due to low capacitance (410 pF) and fast response to transients.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B3V3	Same SOD323 package, identical 3.3 V nominal Zener voltage, but higher max r_dif (100 Ω vs. 95 Ω) and higher leakage (10 µA vs. 5 µA)	Acceptable for non-critical biasing but less suitable for low-leakage reset circuits	Select when cost sensitivity outweighs leakage or impedance requirements
MMSZ4684T1G	SOD123 package (larger footprint), same 3.3 V rating, higher P_tot (500 mW), higher r_dif (120 Ω), and wider tolerance (±5 %)	Preferred for higher-power dissipation scenarios where board space permits larger package	Choose when thermal margin >100 mW is needed and SOD123 layout is already standardized

Compared with BZX384-B3V3 and MMSZ4684T1G, PDZ3.3BF offers the lowest combination of differential resistance and reverse leakage in the SOD323 form factor, making it optimal for precision 3.3 V reference and low-quiescent-current applications where board area is constrained.

Availability

PDZ3.3BF is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset generation, low-power sensor biasing, and ADC reference stabilization requiring stable component supply and consistent parametric performance across production lots.

Supply support for PDZ3.3BF 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.

PDZ3.3BF belongs to the PDZ-B series of low-power Zener diodes engineered specifically for compact, cost-sensitive voltage regulation in consumer, computing, and industrial electronics where SMD footprint and ±2 % tolerance are essential.

FAQ

What is the maximum continuous reverse current the PDZ3.3BF can handle without degradation?

The PDZ3.3BF is rated for a non-repetitive peak reverse current (I_ZSM) of 8.0 A at t_p = 100 µs, but its continuous Zener current is limited by thermal dissipation. At 25 °C ambient on standard FR4, maximum continuous I_Z is approximately 121 mA (400 mW ÷ 3.3 V), derating linearly above 25 °C per the 340 K/W R_th(j-a).

Does the PDZ3.3BF have automotive qualification?

No - the PDZ3.3BF is not automotive-qualified. Nexperia explicitly states in its legal disclaimers that unless a product data sheet expressly declares automotive qualification, the device is not tested or warranted for automotive use. This part is intended for industrial, computing, and consumer applications only.

How does the −2.4 mV/K temperature coefficient affect circuit performance at elevated temperatures?

At +85 °C, the Zener voltage decreases by approximately 144 mV relative to 25 °C (60 K × −2.4 mV/K), shifting the nominal 3.32–3.53 V range to ~3.18–3.39 V. This predictable negative drift must be accounted for in temperature-critical references, but supports stable compensation in bias networks where matched TC is leveraged.

Can PDZ3.3BF be used in forward conduction mode like a standard diode?

Yes - the PDZ3.3BF has a forward voltage ≤0.9 V at 10 mA and ≤1.1 V at 100 mA, meeting typical silicon diode conduction behavior. It is routinely used in dual-role configurations: reverse-biased for regulation and forward-biased for polarity protection or level-shifting in bidirectional signal paths.

PDZ3.3BF Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: PDZ-B

Package/Case:: SC-76, SOD-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 3.3 V

Tolerance:: ±2%

Power - Max:: 400 mW

Impedance (Max) (Zzt):: 1000 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 100 mA

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-323

PDZ3.3BF FAQ

1.How can I place an order for PDZ3.3BF through Aetrix?

Please submit a Request for Quotation (RFQ) for PDZ3.3BF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PDZ3.3BF reliable?

The price and inventory of PDZ3.3BF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ3.3BF is usually 5 days.

3.What payment methods are accepted for PDZ3.3BF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ3.3BF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PDZ3.3BF?

PDZ3.3BF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PDZ3.3BF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PDZ3.3BF?

For technical support, including PDZ3.3BF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ3.3BF requirements.

6.How does Aetrix verify that PDZ3.3BF is sourced from the original manufacturer or authorized distributors?

All PDZ3.3BF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PDZ3.3BF meets industry standards.

7.What is the process for return or replacement of PDZ3.3BF?

All PDZ3.3BF units undergo pre-shipment inspection (PSI). If there is an issue with PDZ3.3BF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PDZ3.3BF part is unused and in its original packaging.

Return procedure for PDZ3.3BF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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