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

Nexperia USA Inc. PZU84-B14-QR

Name: PZU84-B14-QR
Brand: Nexperia USA Inc.
SKU: PZU84-B14-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZU84-B14-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: PZU84-B14-QR.pdf

Description:: DIODE ZENER 14V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:8,864

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Product details

Overview

PZU84-B14-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 14 V nominal breakdown voltage (V_Z = 13.70–14.30 V at I_Z = 5 mA), with differential resistance of 80 Ω at 5 mA, leakage current ≤0.1 μA at 11 V, and qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.

For engineers reviewing the PZU84-B14-QR datasheet, PZU84-B14-QR pinout, PZU84-B14-QR application, or PZU84-B14-QR equivalent, this device serves as a precision low-power shunt regulator in ECU power rails, sensor biasing networks, and ADC reference stabilization where tight voltage tolerance and low dynamic impedance at low currents are required.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable DC voltage across its cathode-anode terminals under varying load or input conditions. It exhibits a hard breakdown knee and very low leakage current, optimized for low-noise analog references and high-accuracy threshold detection.

Its thermal resistance from junction to ambient is 500 K/W on FR4 PCB, and it supports non-repetitive peak reverse power dissipation up to 40 W for 100 μs pulses - enabling transient overvoltage clamping in automotive subsystems without thermal runaway.

Key Specifications

Parameter	Value and Actual Design Meaning
V_Z (nominal)	14 V - precise regulation point for 12 V automotive rail monitoring and clamping
V_Z tolerance	±2 % - ensures voltage stability within ±0.28 V at 25 °C for critical biasing
r_dif	80 Ω at I_Z = 5 mA - low dynamic impedance maintains regulation accuracy under small load variations
I_R	≤0.1 μA at V_R = 11 V - minimal leakage preserves battery-backed circuit integrity during sleep modes
P_tot	250 mW - sufficient for continuous operation in low-power sensor interfaces and microcontroller reset circuits
T_j max	150 °C - enables reliable operation in under-hood automotive environments
AEC-Q101	Qualified - certified for automotive-grade reliability per stress test standard for discrete semiconductors

Pinout & Package

Package: SOT23 plastic surface-mounted package; 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body; anode and cathode defined with terminal 2 internally not connected.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connected to lower-potential node; reverse-biased during regulation; carries forward current during fault conditions
2	Not Connected (n.c.)	No internal bond; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress
3	Cathode (K)	Connected to regulated voltage node; defines reference potential; solder point used for thermal path (R_th(j-sp) = 330 K/W)

Key Features

Feature	Design Value
Hard breakdown knee	Enables sharp, predictable turn-on for accurate overvoltage detection in safety-critical ECUs
Very low leakage current	≤0.1 μA at 11 V supports ultra-low-power wake-up circuits and battery-sensitive modules
Low differential resistance	80 Ω at 5 mA ensures <±10 mV output shift under ±0.8 mA load change - ideal for precision references
AEC-Q101 qualification	Validated for automotive temperature range (−55 °C to +150 °C) and humidity/temperature cycling stress
SOT23 footprint compatibility	Standardized 1.9 mm pitch allows drop-in replacement in existing designs using JEDEC MS-012 compliant layouts

Applications

Engine Control Unit (ECU) Power Monitoring

Automotive Sensor Biasing

Use Scenario: Monitoring 12 V battery rail for undervoltage/overvoltage events in engine management systems.

IC Role / Device Role / Timing Role: Shunt regulator providing stable 14 V reference for comparator input in supply supervision ICs.

Use Value: ±2 % V_Z tolerance ensures trip thresholds remain within 13.7–14.3 V across temperature, preventing false resets.

Use Scenario: Providing stable bias voltage to Hall-effect position sensors in transmission control modules.

IC Role / Device Role / Timing Role: Low-leakage Zener reference establishing fixed operating point for analog front-end amplifiers.

Use Value: ≤0.1 μA leakage avoids signal drift in µA-level sensor bias networks during vehicle sleep mode.

ADC Reference Stabilization

Microcontroller Reset Circuitry

Use Scenario: Stabilizing reference voltage for 12-bit automotive ADCs measuring throttle position or coolant temperature.

IC Role / Device Role / Timing Role: Precision shunt regulator compensating for supply ripple on internal V_REF pins.

Use Value: 80 Ω r_dif limits reference deviation to <±8 mV under 100 µA load variation - preserving measurement linearity.

Use Scenario: Generating clean reset threshold for automotive microcontrollers during cold-cranking transients.

IC Role / Device Role / Timing Role: Clamping element in RC-based reset generator, holding reset active until V_CC exceeds 14 V.

Use Value: Hard breakdown knee ensures monotonic, jitter-free release timing - critical for deterministic boot sequencing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C15-Q	15 V nominal, ±5 % tolerance, higher leakage (≤0.1 μA at 12 V), r_dif = 90 Ω	Less precise regulation; suitable for non-critical voltage clamping where ±5 % is acceptable	Select when cost sensitivity outweighs need for ±2 % tolerance and lowest possible r_dif
MMSZ4687T1G	13.7 V nominal, ±5 %, r_dif = 150 Ω, no AEC-Q101 qualification	Not automotive-qualified; higher impedance reduces regulation fidelity in precision analog paths	Acceptable only for industrial or consumer applications requiring basic 14 V clamping without automotive reliability

Compared with BZX84-C15-Q and MMSZ4687T1G, PZU84-B14-QR delivers tighter tolerance, lower dynamic impedance, and AEC-Q101 certification - making it the sole choice for automotive voltage references demanding long-term stability and functional safety compliance.

Availability

PZU84-B14-QR is available at Aetrix Electronics and suitable for automotive ECU design, sensor interface development, and microcontroller reset circuit implementation requiring stable component supply with full traceability and lifecycle continuity.

Supply support for PZU84-B14-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 essential efficiency-enhancing components, delivering high-performance, reliable, and scalable solutions for automotive, industrial, and consumer markets.

PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for automotive voltage regulation, reference stabilization, and overvoltage protection where precision, low leakage, and robust thermal performance are mandatory.

FAQ

What is the exact Zener voltage range for PZU84-B14-QR at 5 mA test current?

The guaranteed Zener voltage range is 13.70 V to 14.30 V at I_Z = 5 mA and T_j = 25 °C, reflecting its ±2 % tolerance specification. This range remains valid across the full operating junction temperature range (−55 °C to +150 °C), with temperature coefficient of approximately +8.0 mV/K above 12 V nominal devices.

Is PZU84-B14-QR suitable for use in battery management systems (BMS) for electric vehicles?

Yes - its AEC-Q101 qualification, 150 °C maximum junction temperature, and ≤0.1 μA leakage at 11 V make it suitable for auxiliary voltage monitoring in EV BMS modules. However, it is not rated for direct cell-level balancing; use requires external current limiting and thermal derating per board layout.

How does the "n.c." pin (pin 2) affect PCB layout and thermal performance?

Pin 2 is unconnected internally and must remain un-soldered and un-routed on PCB. Leaving it floating prevents parasitic capacitance or mechanical stress that could degrade breakdown consistency. Thermal performance relies solely on pins 1 (anode) and 3 (cathode); R_th(j-sp) = 330 K/W is measured at the cathode solder point.

Can PZU84-B14-QR replace older PZU84-B14 variants without design changes?

Yes - PZU84-B14-QR maintains identical electrical specifications, SOT23 package dimensions, pinning, and marking code (%RX) as prior revisions. The "QR" suffix denotes tape-and-reel packaging per AEC-Q101-compliant manufacturing flow; no schematic or layout modifications are required for drop-in replacement.

PZU84-B14-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):: 14 V

Tolerance:: ±2.14%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 10 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 10 V

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-B14-QR FAQ

1.How can I place an order for PZU84-B14-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU84-B14-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-B14-QR reliable?

The price and inventory of PZU84-B14-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-B14-QR is usually 5 days.

3.What payment methods are accepted for PZU84-B14-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B14-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU84-B14-QR?

PZU84-B14-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU84-B14-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-B14-QR?

For technical support, including PZU84-B14-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B14-QR requirements.

6.How does Aetrix verify that PZU84-B14-QR is sourced from the original manufacturer or authorized distributors?

All PZU84-B14-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-B14-QR meets industry standards.

7.What is the process for return or replacement of PZU84-B14-QR?

All PZU84-B14-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B14-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-B14-QR part is unused and in its original packaging.

Return procedure for PZU84-B14-QR:

1.Submit a request within 90 days.

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

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