Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. PZU84-B27-QR

Name: PZU84-B27-QR
Brand: Nexperia USA Inc.
SKU: PZU84-B27-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: PZU84-B27-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: PZU84-B27-QR.pdf

Description:: DIODE ZENER 27V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:5,192

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

PZU84-B27-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode with nominal 27 V breakdown voltage, optimized for automotive-grade voltage reference and overvoltage protection in SOT23 package. It delivers 21 Ω differential resistance at I_Z = 5 mA, 0.05 μA reverse current at V_R = 21 V, and operates across −55 °C to +150 °C ambient range.

For engineers reviewing the PZU84-B27-QR datasheet, PZU84-B27-QR pinout, PZU84-B27-QR application, or PZU84-B27-QR equivalent, this page provides verified Zener parameters, AEC-Q101 qualification status, thermal resistance (R_th(j-a) = 500 K/W), non-repetitive surge capability (40 W @ 100 μs), and automotive ESD/EMI design context.

Technical Context

This Zener diode belongs to the PZU84-Q series' B-tolerance subgroup (±2 %), featuring hard breakdown knee, very low leakage, and low dynamic impedance-optimized for precision regulation rather than fast switching. Its 27 V nominal Zener voltage places it in the mid-range of the series' 2.4 V–51 V E24 coverage.

Thermal performance is defined by R_th(j-a) = 500 K/W (free air) and R_th(j-sp) = 330 K/W (cathode solder point), with junction temperature limited to 150 °C. The device sustains 40 W non-repetitive peak reverse power for 100 μs square-wave surges at T_j = 25 °C prior to surge.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener voltage V_Z	25.1 V to 28.9 V at I_Z = 5 mA - tight ±2 % tolerance enables stable reference in automotive sensor biasing and ADC reference circuits.
Differential resistance r_dif	150 Ω max at I_Z = 5 mA - low impedance ensures minimal output voltage shift under load variation in feedback networks.
Reverse current I_R	0.05 μA max at V_R = 21 V - ultra-low leakage preserves battery life in always-on automotive modules.
Total power dissipation P_tot	250 mW at T_amb = 25 °C on FR4 PCB - defines maximum continuous DC power handling without heatsinking.
Non-repetitive peak power P_ZSM	40 W for t_p = 100 μs - supports transient suppression in CAN/LIN bus protection and ESD clamp stages.
Junction temperature T_j	−55 °C to +150 °C - AEC-Q101 qualified for under-hood and powertrain applications requiring extended thermal robustness.
Forward voltage V_F	0.9 V max at I_F = 10 mA - low forward drop minimizes conduction loss when used in bidirectional clamping configurations.

Pinout & Package

SOT23 plastic surface-mounted 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.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	DC input terminal for reverse-bias operation; connects to regulated node or surge source in clamp topology.
2	Not connected (n.c.)	Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or thermal derating.
3	Cathode (K)	Main heat path and reference node; soldered to copper pour for thermal management and low-impedance ground return.

Key Features

Feature	Design Value
±2 % Zener voltage tolerance	Enables direct replacement in high-accuracy 27 V reference designs without recalibration or resistor trimming.
AEC-Q101 qualification	Validated for automotive use including engine control units, ADAS power supplies, and infotainment system rails.
Hard breakdown knee	Ensures sharp turn-on and predictable clamping behavior during transients, critical for ISO 7637-2 pulse immunity.
Ultra-low leakage (0.05 μA)	Reduces standby current in always-on vehicle networks (e.g., LIN wake-up receivers, CAN partial networking).
Low thermal resistance (330 K/W)	Supports reliable operation at elevated ambient temperatures without external heatsink in compact ECUs.

Applications

Automotive Sensor Reference

CAN Bus Transient Protection

Use Scenario: Providing stable 27 V bias voltage for piezoresistive pressure sensors in engine manifolds.

IC Role / Device Role / Timing Role: Precision Zener reference diode establishing fixed voltage rail for analog front-end amplification.

Use Value: ±2 % tolerance and 150 Ω r_dif maintain <±10 mV drift over temperature and load, ensuring sensor linearity compliance per ISO 26262 ASIL-B.

Use Scenario: Clamping induced surges on CAN_H/CAN_L lines during load dump or ESD events.

IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between differential pair and ground.

Use Value: 40 W non-repetitive surge rating and 0.05 μA leakage enable fast response without degrading bus quiescent current or signal integrity.

Infotainment Power Sequencing

ADAS Camera Bias Supply

Use Scenario: Generating clean 27 V auxiliary rail for display backlight drivers in head-unit systems.

IC Role / Device Role / Timing Role: Voltage reference for adjustable LDO feedback network controlling sequencing timing.

Use Value: Hard breakdown knee and low r_dif ensure monotonic startup behavior and prevent latch-up during cold-crank conditions.

Use Scenario: Supplying regulated bias to CMOS image sensor analog blocks in surround-view cameras.

IC Role / Device Role / Timing Role: Low-noise Zener shunt regulator stabilizing analog supply independent of main PMIC ripple.

Use Value: Ultra-low leakage and 500 K/W R_th(j-a) sustain stable 27 V output across −40 °C to +105 °C camera operating range.

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-C27	±5 % tolerance, 200 mW P_tot, no AEC-Q101 qualification	Limited to consumer/industrial use; higher V_Z spread increases calibration overhead in automotive designs	Select only for cost-sensitive non-automotive applications where ±5 % tolerance is acceptable.
MMSZ5256B	±5 % tolerance, 500 mW P_tot, SOD-123 package, no AEC-Q101	Higher power but larger footprint; lacks automotive qualification and low-leakage optimization	Prefer for industrial power supplies needing higher surge margin, not for space-constrained automotive modules.

Compared with BZX84-C27 and MMSZ5256B, PZU84-B27-QR uniquely combines AEC-Q101 qualification, ±2 % tolerance, ultra-low leakage, and SOT23 thermal performance-making it the sole choice for ASIL-compliant 27 V reference and clamp functions in modern automotive electronics.

Availability

PZU84-B27-QR is available at Aetrix Electronics and suitable for automotive sensor reference, CAN bus protection, and ADAS camera bias supply requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PZU84-B27-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 solutions.

The PZU84-Q series targets automotive voltage regulation and transient protection, designed specifically to meet AEC-Q101 requirements while delivering precision Zener performance in miniature SOT23 packaging.

FAQ

What is the maximum continuous reverse power dissipation for PZU84-B27-QR at 85 °C ambient?

At T_amb = 85 °C, derated power is 150 mW based on linear derating from 250 mW at 25 °C using R_th(j-a) = 500 K/W. This assumes standard FR4 PCB mounting with single-sided 70 μm copper and tin plating per datasheet condition [2]. Junction temperature remains within 150 °C limit under this condition.

Does PZU84-B27-QR support bidirectional transient suppression?

No-it is a unidirectional Zener diode configured for reverse-bias operation only. For bidirectional clamping, two devices must be used in series opposition (anode-to-anode), leveraging its 0.9 V forward voltage and 27 V reverse breakdown. The n.c. pin prohibits internal integration of dual-diode topology.

How does the "B" suffix in PZU84-B27-QR differ from "C" variants like PZU84-C27-QR?

The "B" suffix denotes ±2 % tolerance and hard breakdown knee with ultra-low leakage (<0.05 μA), optimized for precision regulation. "C" variants offer ±5 % tolerance and intentionally higher leakage for noise reduction in fast-switching applications, per AN90031. Pinout and package are identical.

Is the n.c. pin (Pin 2) electrically isolated or internally bonded?

Pin 2 is fully unconnected-no internal bond wire or die connection exists. It is mechanically present for SOT23 standardization but must remain floating on PCB layout. Connecting it risks parasitic capacitance increase, thermal imbalance, or unintended current paths in high-frequency automotive circuits.

PZU84-B27-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):: 27 V

Tolerance:: ±1.85%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 40 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 21 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-B27-QR FAQ

1.How can I place an order for PZU84-B27-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU84-B27-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-B27-QR reliable?

The price and inventory of PZU84-B27-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-B27-QR is usually 5 days.

3.What payment methods are accepted for PZU84-B27-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B27-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU84-B27-QR?

PZU84-B27-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU84-B27-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-B27-QR?

For technical support, including PZU84-B27-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B27-QR requirements.

6.How does Aetrix verify that PZU84-B27-QR is sourced from the original manufacturer or authorized distributors?

All PZU84-B27-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-B27-QR meets industry standards.

7.What is the process for return or replacement of PZU84-B27-QR?

All PZU84-B27-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B27-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-B27-QR part is unused and in its original packaging.

Return procedure for PZU84-B27-QR:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…