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

Nexperia USA Inc. PZU5.1B2A,115

Name: PZU5.1B2A,115
Brand: Nexperia USA Inc.
SKU: PZU5.1B2A,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZU5.1B2A,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: PZU5.1B2A,115.pdf

Description:: DIODE ZENER 5.1V 320MW SOD323

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Inventory:14,091

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Product details

Overview

PZU5.1B2A,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 voltage reference and overvoltage protection in low-power analog circuits.

For engineers reviewing the PZU5.1B2A,115 datasheet, PZU5.1B2A,115 pinout, PZU5.1B2A,115 application, or PZU5.1B2A,115 equivalent, this device supports stable regulation in space-constrained PCBs where tight voltage tolerance, low leakage, and hard breakdown knee are required for sensor biasing and ADC reference stabilization.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 5.1 V at I_Z = 5 mA, exhibiting a temperature coefficient of +0.3 mV/K and typical junction-to-ambient thermal resistance of 390 K/W on FR4 PCB. Its differential resistance remains ≤250 Ω across the operating current range.

The device features intentional low leakage (2 nA at I_Z = 0.5 mA) and a sharp breakdown knee, optimized for stable DC reference generation rather than transient clamping-distinguishing it from TVS or ESD diodes. It is not rated for repetitive surge handling.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	5.1 V nominal at I_Z = 5 mA; ±2 % tolerance ensures stable reference within ±0.102 V under standard bias.
Differential Resistance r_dif	≤250 Ω at I_Z = 5 mA; minimizes output voltage shift under load current variation.
Reverse Current I_R	2 nA at I_Z = 0.5 mA; enables ultra-low power standby regulation without significant quiescent loss.
Total Power Dissipation P_tot	320 mW at T_amb ≤ 25 °C on FR4 PCB; defines continuous DC power limit for thermal design.
Forward Voltage V_F	1.1 V max at I_F = 100 mA; relevant for polarity-check or series-switch configurations.
Junction Temperature T_j	150 °C maximum; sets upper thermal boundary for reliability in sealed or high-ambient environments.
Package	SOD323 (SC-76); 1.7 mm × 1.25 mm × 0.95 mm footprint ideal for dense mixed-signal layouts.

Pinout & Package

SOD323 (SC-76) plastic surface-mount package with cathode marked by a bar on the body; 2-terminal configuration optimized for minimal board area and automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement.
2	Anode	Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction.

Key Features

Feature	Design Value
±2 % Zener voltage tolerance (B2 series)	Enables tighter regulation accuracy than ±5 % variants, reducing need for post-calibration in precision analog stages.
Hard breakdown knee	Ensures rapid, predictable transition into regulation-critical for stable reference in low-current sensor interfaces.
Very low leakage current	2 nA at 0.5 mA reverse bias minimizes error current in high-impedance reference dividers and battery-powered systems.
Low dynamic impedance	250 Ω max at 5 mA maintains output stability against small signal perturbations in feedback loops.
SOD323 package compatibility	Standardized 1.3 mm pitch and footprint supports pick-and-place automation and IPC-compliant reflow profiles.

Applications

Industrial Sensor Biasing

ADC Reference Stabilization

Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in programmable logic controller (PLC) analog input modules.

IC Role / Device Role / Timing Role: Zener diode functions as a two-terminal shunt voltage reference, maintaining constant 5.1 V across RTD bridge regardless of supply ripple.

Use Value: ±2 % tolerance and <2 nA leakage prevent measurement drift caused by reference inaccuracy or loading error in high-impedance bridges.

Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in portable data loggers powered by coin-cell batteries.

IC Role / Device Role / Timing Role: Acts as low-quiescent shunt regulator feeding ADC VREF pin, replacing higher-power IC references where size and cost are constrained.

Use Value: 320 mW power rating and SOD323 footprint enable direct integration near ADC without thermal derating or layout overhead.

Microcontroller Reset Circuitry

Low-Power Voltage Monitoring

Use Scenario: Generating clean 5.1 V threshold for external reset supervisor ICs monitoring 5 V system rails in embedded gateways.

IC Role / Device Role / Timing Role: Provides precise, temperature-stable trigger point for reset assertion; placed upstream of supervisor's sense input.

Use Value: +0.3 mV/K temperature coefficient ensures minimal trip-point drift across –40 °C to +85 °C industrial operating range.

Use Scenario: Detecting brown-out conditions in battery management subsystems for IoT edge nodes using discrete comparator-based monitoring.

IC Role / Device Role / Timing Role: Serves as fixed reference for comparator input, comparing against scaled battery voltage to flag undervoltage events.

Use Value: Hard breakdown knee and low dynamic impedance ensure consistent switching threshold despite varying source impedance from RC divider networks.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B5V1	Same 5.1 V nominal, ±2 %, but SOD323 package with 400 mW P_tot and 600 Ω r_dif.	Higher power rating suits higher-current regulation; higher impedance limits low-current precision use.	Select when >320 mW dissipation or less stringent dynamic impedance is acceptable.
MMSZ5231B	5.1 V, ±5 %, SOD123 package, 500 mW P_tot, 17 Ω r_dif at 20 mA-but larger footprint and looser tolerance.	Better regulation at higher currents; ±5 % tolerance requires calibration if absolute accuracy is critical.	Choose for cost-sensitive designs where 5 % tolerance and SOD123 placement are acceptable.

Compared with BZX384-B5V1 and MMSZ5231B, PZU5.1B2A,115 delivers superior low-current stability (250 Ω vs. ≥600 Ω), tighter tolerance (±2 %), and lowest leakage (2 nA), making it optimal for precision, low-power reference roles-not general-purpose clamping.

Availability

PZU5.1B2A,115 is available at Aetrix Electronics and suitable for industrial sensor biasing, ADC reference stabilization, microcontroller reset circuitry, and low-power voltage monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PZU5.1B2A,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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.

PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, designed specifically for space-constrained, low-power analog reference and regulation tasks in consumer, industrial, and computing applications.

FAQ

What is the maximum non-repetitive peak reverse power dissipation for PZU5.1B2A,115?

The device supports up to 40 W non-repetitive peak reverse power dissipation for 100 µs square-wave pulses at T_j = 25 °C prior to surge. This rating applies only to transient events-not continuous operation-and requires strict adherence to pulse duration and duty cycle limits defined in the datasheet.

Can PZU5.1B2A,115 be used as a replacement for a 5 V linear regulator IC?

No-it is a two-terminal shunt Zener diode, not a three-terminal series regulator. It requires an external current-limiting resistor and regulates by diverting excess current to ground. It cannot deliver regulated output current like an LDO; its role is voltage reference or low-current stabilization, not power conversion.

How does the B2 tolerance designation affect Zener voltage specification?

B2 indicates ±2 % tolerance around the nominal 5.1 V Zener voltage, meaning the actual V_Z falls between 4.998 V and 5.202 V at I_Z = 5 mA and T_j = 25 °C. This tighter spec improves accuracy in applications where reference drift must stay below 100 mV without trimming.

Is PZU5.1B2A,115 suitable for automotive applications?

No-the device is not AEC-Q200 qualified and lacks automotive-specific validation. Nexperia explicitly states that non-automotive qualified products like PZU5.1B2A,115 are unsuitable for safety-critical or life-support systems, including automotive ECUs, ADAS sensors, or infotainment power rails.

PZU5.1B2A,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

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

PZU5.1B2A,115 FAQ

1.How can I place an order for PZU5.1B2A,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU5.1B2A,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 PZU5.1B2A,115 reliable?

The price and inventory of PZU5.1B2A,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU5.1B2A,115 is usually 5 days.

3.What payment methods are accepted for PZU5.1B2A,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU5.1B2A,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU5.1B2A,115?

PZU5.1B2A,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU5.1B2A,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 PZU5.1B2A,115?

For technical support, including PZU5.1B2A,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU5.1B2A,115 requirements.

6.How does Aetrix verify that PZU5.1B2A,115 is sourced from the original manufacturer or authorized distributors?

All PZU5.1B2A,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 PZU5.1B2A,115 meets industry standards.

7.What is the process for return or replacement of PZU5.1B2A,115?

All PZU5.1B2A,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU5.1B2A,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 PZU5.1B2A,115 part is unused and in its original packaging.

Return procedure for PZU5.1B2A,115:

1.Submit a request within 90 days.

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

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