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

Nexperia USA Inc. PZU9.1BA,115

Name: PZU9.1BA,115
Brand: Nexperia USA Inc.
SKU: PZU9.1BA,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZU9.1BA,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: PZU9.1BA,115.pdf

Description:: DIODE ZENER 9.1V 320MW SOD323

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Inventory:6,135

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Product details

Overview

PZU9.1BA,115 from Nexperia is a surface-mount Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and overvoltage protection in low-power analog circuits. It delivers a nominal Zener voltage of 9.1 V with ±5 % tolerance (B-series), differential resistance ≤60 Ω at I_Z = 5 mA, reverse current ≤10 nA at I_Z = 0.5 mA, and non-repetitive peak reverse power dissipation up to 40 W. It is used in power supply feedback loops and sensor biasing networks.

For engineers reviewing the PZU9.1BA,115 datasheet, PZU9.1BA,115 pinout, PZU9.1BA,115 application, or PZU9.1BA,115 equivalent, key selection criteria include Zener voltage accuracy, dynamic impedance at regulation current, thermal resistance (R_th(j-a) = 390 K/W), leakage performance at low bias, and SOD323 footprint compatibility with high-density PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its hard breakdown knee and low leakage support clean regulation in low-current (<5 mA) reference paths, while intentional minor leakage rise improves switching speed and noise immunity per AN90031.

The device uses silicon planar epitaxial construction with cathode-anode polarity defined by a marking bar on the SOD323 body. Junction temperature is rated to 150 °C, and thermal resistance from junction to ambient is 390 K/W on standard FR4 PCB - critical for derating in compact enclosures.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	9.1 V nominal, ±5 % tolerance - ensures predictable clamping level in 9 V rail supervision
Differential Resistance r_dif	≤60 Ω at I_Z = 5 mA - minimizes output voltage shift under load variation
Reverse Current I_R	≤10 nA at I_Z = 0.5 mA - preserves low quiescent current in battery-powered references
Non-repetitive Peak Power P_ZSM	40 W (t_p = 100 µs) - supports transient surge suppression without failure
Total Power Dissipation P_tot	320 mW at T_amb ≤ 25 °C - defines continuous DC power limit on standard FR4 PCB
Junction Temperature T_j	150 °C maximum - sets upper thermal boundary for reliability in sealed environments
Thermal Resistance R_th(j-a)	390 K/W - determines temperature rise per watt on single-sided copper FR4 layout

Pinout & Package

SOD323 (SC-76) plastic surface-mount package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar.

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

Key Features

Feature	Design Value
Hard breakdown knee	Enables sharp, predictable turn-on at 9.1 V - reduces regulation hysteresis in feedback networks
Very low leakage current	≤10 nA at 0.5 mA bias - avoids loading high-impedance sensor outputs or op-amp inputs
Optimized fast switching	Minor intentional leakage rise per AN90031 - improves response to fast transients without oscillation
Low dynamic impedance	≤60 Ω at 5 mA - maintains <±10 mV output deviation across ±1 mA load changes
SOD323 footprint	1.7 mm × 1.25 mm body - enables placement in space-constrained IoT sensor modules and wearables

Applications

Power Supply Feedback Reference

Sensor Biasing Network

Use Scenario: Stabilizing output voltage in isolated DC-DC converter feedback loop using optocoupler-coupled error amplifier.

IC Role / Device Role / Timing Role: Zener diode provides precise 9.1 V reference to TL431 shunt regulator input, defining secondary-side regulation threshold.

Use Value: ±5 % V_Z tolerance and ≤60 Ω r_dif ensure <±1.5 % output voltage accuracy across line/load/temperature.

Use Scenario: Providing stable bias voltage to MEMS pressure sensor bridge in battery-powered environmental monitor.

IC Role / Device Role / Timing Role: Zener diode supplies low-noise, low-drift reference to sensor excitation circuit, replacing higher-power LDO.

Use Value: ≤10 nA reverse current extends battery life beyond 5 years in 10 µA sleep-mode operation.

Overvoltage Clamp Protection

ADC Input Protection

Use Scenario: Protecting microcontroller GPIO pins from ESD and inductive kickback in industrial control I/O module.

IC Role / Device Role / Timing Role: Placed between signal line and ground to clamp transients above 9.1 V before they reach MCU input protection diodes.

Use Value: 40 W non-repetitive surge rating absorbs 1 kV/1 A IEC 61000-4-5 surge pulses without degradation.

Use Scenario: Limiting input voltage to 12-bit SAR ADC in data acquisition system handling ±10 V analog signals.

IC Role / Device Role / Timing Role: Connected as shunt limiter at ADC input to prevent overvoltage damage during signal fault conditions.

Use Value: Hard breakdown knee ensures clamping initiates sharply at 9.1 V - avoids ADC saturation or latch-up.

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-B9V1	Same 9.1 V ±5 %, but SOD323 package with 250 mW P_tot and higher r_dif (≤90 Ω)	Limited surge capability (P_ZSM = 25 W); less suitable for transient-heavy environments	Prefer when cost sensitivity outweighs surge robustness and low-impedance regulation needs
MMSZ5240B	9.1 V ±5 %, SOD123 package (larger), P_tot = 500 mW, r_dif = ≤100 Ω	Higher thermal mass improves steady-state power handling but increases board area by 2.5×	Choose when PCB layout allows larger footprint and continuous dissipation >320 mW is required

Compared with BZX384-B9V1 and MMSZ5240B, PZU9.1BA,115 offers superior dynamic impedance and surge resilience in the smallest SOD323 form factor - making it optimal for space-constrained, low-leakage, high-transient applications where regulation precision and footprint efficiency are jointly critical.

Availability

PZU9.1BA,115 is available at Aetrix Electronics and suitable for power supply feedback references, sensor biasing networks, overvoltage clamp protection, and ADC input protection requiring stable component supply across industrial, medical, and consumer electronics programs.

Supply support for PZU9.1BA,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.

The PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for precision voltage reference and transient suppression in space-constrained, low-power analog systems.

FAQ

What is the maximum continuous reverse current the PZU9.1BA,115 can sustain without exceeding its 320 mW power limit?

At 9.1 V Zener voltage and 320 mW total power dissipation, the maximum continuous reverse current is approximately 35.2 mA (I_Z = P_tot/V_Z). This assumes ambient temperature ≤25 °C on standard FR4 PCB; derating applies above that temperature per the thermal resistance curve.

How does the PZU9.1BA,115's temperature coefficient affect regulation stability across –40 °C to +85 °C?

Per Figure 4 in the datasheet, the PZU9.1BA,115 exhibits a typical temperature coefficient of +5.5 mV/K near 9.1 V. Over –40 °C to +85 °C (ΔT = 125 K), this yields ~+688 mV drift - meaning V_Z shifts from ~8.4 V to ~9.1 V. System-level compensation may be needed for sub-1 % accuracy requirements.

Can the PZU9.1BA,115 be used in parallel for higher power handling?

No - Zener diodes exhibit negative temperature coefficients below ~5 V and positive above, but even within the same batch, slight V_Z mismatches cause current hogging. Parallel use risks thermal runaway and premature failure; external ballast resistors or dedicated regulators are required instead.

Is the SOD323 footprint of PZU9.1BA,115 compatible with automated optical inspection (AOI) systems?

Yes - the SOD323 package has standardized dimensions (1.7 mm × 1.25 mm) and visible cathode marking bar, enabling reliable detection by AOI systems calibrated for SC-76 footprints. Reflow soldering footprint in Figure 10 confirms pad geometry meets IPC-7351B Class L standards.

PZU9.1BA,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):: 9.1 V

Tolerance:: ±5%

Power - Max:: 320 mW

Impedance (Max) (Zzt):: 10 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 6 V

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

Operating Temperature:: -55°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-323

PZU9.1BA,115 FAQ

1.How can I place an order for PZU9.1BA,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU9.1BA,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 PZU9.1BA,115 reliable?

The price and inventory of PZU9.1BA,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU9.1BA,115 is usually 5 days.

3.What payment methods are accepted for PZU9.1BA,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU9.1BA,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU9.1BA,115?

PZU9.1BA,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU9.1BA,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 PZU9.1BA,115?

For technical support, including PZU9.1BA,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU9.1BA,115 requirements.

6.How does Aetrix verify that PZU9.1BA,115 is sourced from the original manufacturer or authorized distributors?

All PZU9.1BA,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 PZU9.1BA,115 meets industry standards.

7.What is the process for return or replacement of PZU9.1BA,115?

All PZU9.1BA,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU9.1BA,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 PZU9.1BA,115 part is unused and in its original packaging.

Return procedure for PZU9.1BA,115:

1.Submit a request within 90 days.

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

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