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

Nexperia USA Inc. PZU5.1B3A,115

Name: PZU5.1B3A,115
Brand: Nexperia USA Inc.
SKU: PZU5.1B3A,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZU5.1B3A,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: PZU5.1B3A,115.pdf

Description:: DIODE ZENER 5.1V 320MW SOD323

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Product details

Overview

PZU5.1B3A,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 5.1 V nominal working voltage at 5 mA, with 250 Ω maximum differential resistance and 2 nA reverse current at 0.5 mA, used for precision low-power voltage reference and overvoltage protection in compact power management circuits.

For engineers reviewing the PZU5.1B3A,115 datasheet, PZU5.1B3A,115 pinout, PZU5.1B3A,115 application, or PZU5.1B3A,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), low leakage (2 nA @ I_Z = 0.5 mA), hard breakdown knee, and thermal resistance (255 K/W junction-to-solder point) in ultra-small SMD form factor.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain stable 5.1 V regulation across load and line variations, with intentional low dynamic impedance (250 Ω max at 5 mA) and minimal temperature coefficient (+0.3 mV/K typical) enabling high-accuracy reference performance in ambient temperatures from −55 °C to +150 °C.

Its SOD323 package supports surface-mount reflow and wave soldering per defined footprints, and its non-repetitive peak reverse power dissipation of 40 W (100 µs pulse) allows transient surge suppression without thermal runaway when properly mounted on FR4 PCB with 1 cm² cathode pad.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	5.14 V to 5.37 V at I_Z = 5 mA - tight ±2 % tolerance enables precise voltage clamping in feedback loops.
Differential Resistance r_dif	250 Ω max at I_Z = 5 mA - ensures minimal output voltage shift under varying load current.
Reverse Current I_R	2 nA max at V_R = 4.42 V - ultra-low leakage preserves battery life in always-on sensing nodes.
Forward Voltage V_F	1.1 V max at I_F = 100 mA - supports use as polarity-sensitive clamp or ESD protection element.
Thermal Resistance R_th(j-sp)	255 K/W junction-to-solder point - enables reliable operation up to 150 °C junction temperature with standard PCB layout.
Non-repetitive Peak Power P_ZSM	40 W at t_p = 100 µs - provides robust transient overvoltage suppression without derating.
Total Power Dissipation P_tot	320 mW at T_amb ≤ 25 °C on FR4 - defines continuous DC power handling in standard mounting.

Pinout & Package

The device uses a two-terminal SOD323 (SC-76) plastic surface-mount package measuring 1.7 mm × 1.25 mm × 0.95 mm, with cathode identified by a marking bar on the body.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; marking bar indicates this terminal; carries reverse current during Zener conduction.
2	Anode	Connected to ground or lower-potential rail; forms the reference return path for regulation current.

Key Features

Feature	Design Value
Hard breakdown knee	Enables sharp, predictable turn-on at 5.1 V - critical for accurate threshold detection in supervisor circuits.
Very low leakage current	2 nA at 0.5 mA test current - minimizes quiescent power loss in battery-powered IoT sensor nodes.
±2 % voltage tolerance (B3 series)	Reduces calibration overhead in analog front-ends and ADC reference buffers requiring <1 % error budget.
Optimized for low-current operation	Specified down to I_Z = 0.5 mA - supports regulation in micro-power applications where bias current is constrained.
SOD323 footprint compatibility	Standard 1.3 mm pitch, 1.7 mm × 1.25 mm body - fits high-density layouts and automated placement equipment.

Applications

Power Supply Reference

Overvoltage Protection

Use Scenario: Providing stable 5.1 V reference for LDO feedback divider or ADC voltage reference buffer in portable medical sensors.

IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference potential independent of supply variation.

Use Value: ±2 % tolerance and 0.3 mV/K temperature coefficient ensure reference drift remains below 0.5 % over −40 °C to +85 °C operating range.

Use Scenario: Clamping input voltage to 5.1 V before feeding into 5 V logic interface of an industrial PLC I/O module.

IC Role / Device Role / Timing Role: Shunt regulator absorbing transient surges above 5.1 V to protect downstream CMOS inputs.

Use Value: 40 W non-repetitive peak power rating handles 100 µs ESD pulses without degradation when mounted with 1 cm² cathode pad.

Low-Power Sensor Biasing

Signal Level Translation

Use Scenario: Generating precise bias voltage for MEMS accelerometer analog output stage in energy-harvesting wireless node.

IC Role / Device Role / Timing Role: Low-leakage (2 nA) Zener establishing stable DC offset in ultra-low-current signal chain.

Use Value: Sub-nA leakage prevents loading of high-impedance sensor outputs and maintains >10-year battery life in 10 µA average current design.

Use Scenario: Translating 3.3 V logic signals to 5.1 V compatible levels for legacy interface ICs in mixed-voltage FPGA carrier boards.

IC Role / Device Role / Timing Role: Clamp diode limiting high-side swing to 5.1 V while allowing full 0–3.3 V low-side swing.

Use Value: Hard breakdown knee and 250 Ω dynamic impedance ensure clean, fast edge response without ringing or overshoot.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B5V1,115	Same SOD323 package and 5.1 V rating, but ±5 % tolerance (B series) and higher 5 µA IR at 4.1 V.	Less suitable for precision references; acceptable for general-purpose clamping where cost is prioritized over accuracy.	Select when ±5 % tolerance and higher leakage are acceptable and BOM consolidation with broader BZX384 family is desired.
MMSZ5231B-7-F	SOD-123 package (larger, 2.7 mm × 1.4 mm), ±5 % tolerance, 100 nA IR at 4.1 V, 17 Ω r_dif.	Better regulation stability at higher currents but incompatible footprint; requires PCB redesign.	Choose only if board space permits larger package and lower dynamic impedance (<20 Ω) is required for high-current shunt regulation.

Compared with BZX384-B5V1,115, PZU5.1B3A,115 delivers tighter voltage control and lower leakage for precision biasing; versus MMSZ5231B-7-F, it trades off dynamic impedance for 30 % smaller footprint and superior thermal resistance in constrained layouts.

Availability

PZU5.1B3A,115 is available at Aetrix Electronics and suitable for precision voltage reference, overvoltage protection, and low-power sensor biasing requiring stable component supply across automotive infotainment, industrial automation, and medical wearables design cycles.

Supply support for PZU5.1B3A,115 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for power management, signal integrity, and interface applications.

PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered for compact, high-accuracy voltage stabilization in space-constrained consumer, industrial, and computing systems.

FAQ

What is the maximum continuous power dissipation for PZU5.1B3A,115 at 70 °C ambient?

At 70 °C ambient, derated power is calculated using R_th(j-a) = 390 K/W: P_tot = (T_j(max) − T_amb) / R_th(j-a) = (150 − 70) / 390 ≈ 205 mW. This assumes free-air mounting; PCB-mounted performance improves with copper area.

Does PZU5.1B3A,115 support bidirectional ESD protection?

No - it is a unidirectional Zener diode optimized for reverse-bias regulation. Its forward voltage is 1.1 V at 100 mA, making it unsuitable as a symmetric TVS; dedicated bidirectional ESD arrays like PESD5V0S1BA should be used instead.

How does the B3 tolerance series differ from B1/B2 in the PZUxBA family?

B3 denotes ±2 % tolerance specifically for 5.1 V to 12 V types (including PZU5.1B3A,115); B1 and B2 also specify ±2 % but apply to different voltage ranges - B1 covers 2.4 V–4.7 V, B2 covers 13 V–36 V, ensuring optimal process binning per voltage band.

Can PZU5.1B3A,115 be used in place of a 5 V TTL logic clamp?

Yes - with V_Z = 5.14–5.37 V, it safely limits input voltage to 5.1 V, staying within 5 V TTL high-level input range (2.0–5.5 V). Its 250 Ω r_dif ensures minimal droop under 1 mA clamp current, preserving noise margin.

PZU5.1B3A,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 5.1 V

Tolerance:: ±2%

Power - Max:: 320 mW

Impedance (Max) (Zzt):: 60 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 1.5 V

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

Operating Temperature:: 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-323

PZU5.1B3A,115 FAQ

1.How can I place an order for PZU5.1B3A,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU5.1B3A,115 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 PZU5.1B3A,115 reliable?

The price and inventory of PZU5.1B3A,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU5.1B3A,115 is usually 5 days.

3.What payment methods are accepted for PZU5.1B3A,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU5.1B3A,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU5.1B3A,115?

PZU5.1B3A,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU5.1B3A,115 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 PZU5.1B3A,115?

For technical support, including PZU5.1B3A,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU5.1B3A,115 requirements.

6.How does Aetrix verify that PZU5.1B3A,115 is sourced from the original manufacturer or authorized distributors?

All PZU5.1B3A,115 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 PZU5.1B3A,115 meets industry standards.

7.What is the process for return or replacement of PZU5.1B3A,115?

All PZU5.1B3A,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU5.1B3A,115, 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 PZU5.1B3A,115 part is unused and in its original packaging.

Return procedure for PZU5.1B3A,115:

1.Submit a request within 90 days.

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

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