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

Nexperia USA Inc. PZU84-B9V1-QR

Name: PZU84-B9V1-QR
Brand: Nexperia USA Inc.
SKU: PZU84-B9V1-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZU84-B9V1-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: PZU84-B9V1-QR.pdf

Description:: DIODE ZENER 9.04V 250MW TO236AB

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Product details

Overview

PZU84-B9V1-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 9.1 V nominal breakdown voltage at I_Z = 5 mA, with differential resistance of 60 Ω, reverse leakage ≤0.5 μA at V_R = 6 V, and qualified to AEC-Q101 for automotive power rail stabilization.

For engineers reviewing the PZU84-B9V1-QR datasheet, PZU84-B9V1-QR pinout, PZU84-B9V1-QR application, or PZU84-B9V1-QR equivalent, this part supports precision voltage reference, overvoltage clamping, and ECU supply rail regulation where low dynamic impedance and hard breakdown knee are required.

Technical Context

This Zener diode operates in reverse breakdown mode with a sharp, hard knee characteristic optimized for stable reference generation at low currents (IZ = 0.5–5 mA). Its 60 Ω differential resistance at 5 mA ensures minimal output voltage variation under load transients.

Designed per AEC-Q101, it delivers junction temperature operation up to 150 °C and features intentional low leakage (≤0.5 μA at VR = 6 V) and low capacitance (120 pF at f = 1 MHz), enabling use in noise-sensitive analog and automotive control circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
Breakdown Voltage V_Z	9.1 V nominal at I_Z = 5 mA; ±2 % tolerance ensures tight regulation in feedback loops
Differential Resistance r_dif	60 Ω at I_Z = 5 mA; maintains stable output under small-signal current variations
Reverse Leakage I_R	≤0.5 μA at V_R = 6 V; minimizes standby power loss in always-on automotive modules
Forward Voltage V_F	≤0.9 V at I_F = 10 mA; enables reliable anode-cathode polarity verification during test
Power Dissipation P_tot	250 mW on FR4 PCB; supports continuous regulation in compact SMT layouts without heatsinking
Junction Temperature T_j	−55 °C to +150 °C; validated for engine bay and ADAS ECU environments
Thermal Resistance R_th(j-a)	500 K/W in free air; defines derating curve for ambient temperature-dependent power handling

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch); thermally enhanced cathode tab design with R_th(j-sp) = 330 K/W to solder point.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward-biased terminal; connects to lower-potential node in shunt regulation configuration
2	Not Connected (n.c.)	Internally isolated; no electrical function-must remain unconnected on PCB
3	Cathode (K)	Reverse-biased terminal; ties to regulated voltage node and provides thermal path to PCB copper

Key Features

Feature	Design Value
Hard breakdown knee	Enables precise 9.1 V clamping with <10 mV deviation across 0.5–5 mA operating range
AEC-Q101 qualification	Validated for automotive Grade 1 (−40 °C to +125 °C ambient) and lifetime reliability in ECU applications
Low dynamic impedance	60 Ω at 5 mA improves PSRR by >20 dB vs. generic Zeners in 5–12 V rail monitoring
Low leakage current	≤0.5 μA at 6 V reverse bias reduces quiescent current in battery-backed systems
E24 voltage coverage	Part of 34-value series spanning 2.4 V–51 V; enables exact BOM matching without resistor trimming

Applications

Automotive Engine Control Unit (ECU)

Industrial Sensor Signal Conditioning

Use Scenario: Stabilizing 9.1 V reference for microcontroller ADC input scaling in diesel ECU power management.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias for analog front-end circuitry.

Use Value: Hard breakdown knee and ±2 % tolerance ensure <±5 mV reference drift across −40 °C to +125 °C ambient.

Use Scenario: Clamping 10 V sensor excitation rail against load dump transients in factory-floor pressure transmitters.

IC Role / Device Role / Timing Role: Overvoltage protection element limiting rail excursion to 9.1 V ±0.2 V.

Use Value: 40 W non-repetitive peak power rating absorbs 100 μs surges without degradation.

Automotive Body Control Module (BCM)

Medical Diagnostic Equipment Power Sequencing

Use Scenario: Regulating 9.1 V supply for LIN bus transceiver biasing in door module electronics.

IC Role / Device Role / Timing Role: Low-leakage shunt regulator maintaining clean V_REF during sleep-mode operation.

Use Value: ≤0.5 μA leakage at 6 V reverse bias extends battery life in always-on wake-up circuits.

Use Scenario: Generating precise 9.1 V startup threshold for power-on reset logic in portable ultrasound units.

IC Role / Device Role / Timing Role: Voltage detection element triggering sequencing controller at defined rail level.

Use Value: 60 Ω r_dif ensures <1 mV hysteresis shift between turn-on/turn-off thresholds.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C9V1	±5 % tolerance, 100 Ω r_dif at 5 mA, not AEC-Q101 qualified	Limited to commercial-grade consumer devices; unsuitable for automotive under-hood use	Select only for cost-sensitive non-automotive designs where ±5 % V_Z and higher impedance are acceptable
MMSZ5240B	±5 % tolerance, 17 Ω r_dif, 100 mW P_tot, SOD-123 package	Lower power rating and different footprint require PCB redesign; lacks automotive qualification	Choose when ultra-low impedance is critical and board space allows SOD-123 layout; verify thermal margin at 250 mW

Compared with BZX84-C9V1 and MMSZ5240B, PZU84-B9V1-QR uniquely combines AEC-Q101 qualification, ±2 % tolerance, 60 Ω impedance, and 250 mW dissipation in SOT23-making it the only drop-in solution for automotive 9.1 V reference and clamping where reliability and precision are co-constrained.

Availability

PZU84-B9V1-QR is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for PZU84-B9V1-QR 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 components and energy-efficient power solutions.

PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, engineered specifically for automotive power rail stabilization, ECU reference generation, and noise-immune voltage clamping in harsh environments.

FAQ

What is the maximum reverse voltage before breakdown for PZU84-B9V1-QR?

The nominal Zener voltage is 9.1 V at I_Z = 5 mA, with guaranteed minimum 8.56 V and maximum 9.55 V across the ±2 % tolerance band. Breakdown occurs sharply above 8.56 V in reverse bias; operation below this voltage yields only leakage current ≤0.5 μA at 6 V.

Can PZU84-B9V1-QR be used in parallel for higher power dissipation?

No-Zener diodes exhibit negative temperature coefficient mismatch; paralleling causes current hogging and thermal runaway. For >250 mW needs, use external series resistors or active regulation. The device's 250 mW rating assumes standard FR4 PCB mounting with single-sided 70 μm copper.

Is Pin 2 truly unused, or does it serve a thermal or shielding function?

Pin 2 is internally not connected (n.c.) per Nexperia's official pinning diagram and package outline. It has no electrical or thermal function and must remain unconnected on the PCB-no routing, stitching, or grounding is permitted or beneficial.

How does the temperature coefficient affect regulation accuracy over automotive temperature range?

At 9.1 V nominal, the temperature coefficient is +3.8 mV/K (typical). Over −40 °C to +125 °C (165 K span), this introduces ~627 mV drift-mitigated by using the diode in constant-current bias (e.g., with 10 kΩ series resistor) to limit self-heating and stabilize operating point.

PZU84-B9V1-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: PZU84-Q

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 9.04 V

Tolerance:: ±2.1%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 10 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 500 mV

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

PZU84-B9V1-QR FAQ

1.How can I place an order for PZU84-B9V1-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU84-B9V1-QR 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 PZU84-B9V1-QR reliable?

The price and inventory of PZU84-B9V1-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-B9V1-QR is usually 5 days.

3.What payment methods are accepted for PZU84-B9V1-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B9V1-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU84-B9V1-QR?

PZU84-B9V1-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU84-B9V1-QR 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 PZU84-B9V1-QR?

For technical support, including PZU84-B9V1-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B9V1-QR requirements.

6.How does Aetrix verify that PZU84-B9V1-QR is sourced from the original manufacturer or authorized distributors?

All PZU84-B9V1-QR 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 PZU84-B9V1-QR meets industry standards.

7.What is the process for return or replacement of PZU84-B9V1-QR?

All PZU84-B9V1-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B9V1-QR, 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 PZU84-B9V1-QR part is unused and in its original packaging.

Return procedure for PZU84-B9V1-QR:

1.Submit a request within 90 days.

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

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