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

Nexperia USA Inc. PZU84-C33-QR

Name: PZU84-C33-QR
Brand: Nexperia USA Inc.
SKU: PZU84-C33-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZU84-C33-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: PZU84-C33-QR.pdf

Description:: DIODE ZENER 33V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PZU84-C33-QR from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 package, with nominal breakdown voltage 33 V, differential resistance 250 Ω at I_Z = 5 mA, and reverse current ≤0.05 μA at V_R = 25 V - used for precision voltage reference and overvoltage clamping in automotive power rails.

For engineers reviewing the PZU84-C33-QR datasheet, PZU84-C33-QR pinout, PZU84-C33-QR application, or PZU84-C33-QR equivalent, this page delivers verified Zener parameters, AEC-Q101 qualification status, thermal resistance (R_th(j-sp) = 330 K/W), leakage behavior at low bias, and validated automotive-grade substitution options.

Technical Context

This Zener diode belongs to the PZU84-Cxx-Q subfamily optimized for low-noise regulation and fast transient response, achieved via intentional minor leakage current rise - distinct from the ultra-low-leakage PZU84-Bxx-Q series. It operates with a hard breakdown knee and exhibits temperature coefficient of +27.4 mV/K at I_Z = 5 mA.

Designed for stable DC reference under variable load and temperature, it supports reverse-biased operation up to 150 °C junction temperature and withstands non-repetitive 40 W surge pulses (t_p = 100 μs). Its 33 V nominal Zener voltage targets mid-range automotive subsystems requiring robust overvoltage protection.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	31.0 V to 35.0 V at I_Z = 5 mA - defines regulated output voltage window under standard test conditions
Differential Resistance r_dif	250 Ω at I_Z = 5 mA - determines output impedance and load regulation sensitivity
Reverse Current I_R	≤0.05 μA at V_R = 25 V - ensures minimal standby power loss in high-impedance bias networks
Power Dissipation P_tot	250 mW on FR4 PCB - sets maximum continuous DC power handling in standard layout
Junction-to-Solder-Point R_th(j-sp)	330 K/W - quantifies thermal path efficiency from die to cathode solder joint
Non-repetitive Peak Power P_ZSM	40 W for 100 μs square wave - enables transient overvoltage suppression without failure
AEC-Q101 Qualified	Yes - certified for automotive use per stress test qualification for discrete semiconductors

Pinout & Package

SOT23 plastic surface-mounted package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, 3-terminal configuration with anode (Pin 1), not-connected (Pin 2), and cathode (Pin 3).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward-biased terminal; connects to lower-potential node in Zener regulation configuration
2	Not Connected (n.c.)	Internally unconnected; must remain floating - no PCB trace or component attachment
3	Cathode (K)	Reverse-biased terminal; connects to higher-potential node and serves as primary heat-sinking path

Key Features

Feature	Design Value
±5 % Zener voltage tolerance	Enables cost-optimized selection where tighter regulation is unnecessary, e.g., bulk rail clamping
Optimized leakage for noise reduction	Controlled 0.05 μA reverse current improves signal integrity in analog sensor supply paths
Hard breakdown knee	Ensures sharp transition into regulation, minimizing ambiguity in threshold detection circuits
AEC-Q101 qualification	Validates reliability for under-hood automotive modules operating across −40 °C to +125 °C ambient
Low capacitance (60 pF)	Maintains high-frequency stability in feedback loops and ESD-coupled protection networks

Applications

Engine Control Unit (ECU) Reference

Infotainment Power Rail Clamp

Use Scenario: Provides stable 33 V reference for ADC biasing and sensor excitation in engine management systems.

IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise DC offset for analog front-end circuitry.

Use Value: Maintains <±1 % reference drift over −40 °C to +125 °C due to controlled +27.4 mV/K temperature coefficient and AEC-Q101 thermal cycling validation.

Use Scenario: Clamps 33 V auxiliary power rail against load-dump transients in head unit power distribution.

IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 40 W non-repetitive surges without degradation.

Use Value: Survives ISO 7637-2 Pulse 5a events via 100 μs/40 W surge rating and 150 °C max junction temperature capability.

Body Control Module (BCM) Overvoltage Protection

ADAS Camera Power Conditioning

Use Scenario: Guards microcontroller I/O pins against 33 V rail overshoot during battery hot-swap events.

IC Role / Device Role / Timing Role: Low-capacitance (60 pF) shunt regulator limiting voltage excursion before TVS activation.

Use Value: Delays TVS triggering by absorbing initial energy with 250 Ω dynamic impedance, reducing system-level EMI.

Use Scenario: Stabilizes 33 V imaging sensor bias supply in rear-view camera modules exposed to thermal cycling.

IC Role / Device Role / Timing Role: Precision Zener reference maintaining voltage accuracy despite ambient swings from −40 °C to +105 °C.

Use Value: Achieves <0.5 % long-term drift via hard-knee breakdown and AEC-Q101 qualified metallization and passivation.

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-C33-TP	±5 % tolerance, 31–35 V range, but rated only to 300 mW P_tot and lacks AEC-Q101 qualification	Acceptable for industrial/commercial boards; unsuitable for automotive production due to missing stress-test validation	Select when cost is prioritized over automotive compliance and thermal margin is sufficient
MMSZ5257ET1G	±5 % tolerance, 31.35–34.65 V range, 500 mW P_tot, but uses SOD-123 package (larger footprint, higher R_th(j-a))	Offers higher power headroom but requires PCB redesign; no AEC-Q101 certification	Choose only if board space allows SOD-123 and automotive qualification is not required

Compared with BZX84-C33-TP and MMSZ5257ET1G, PZU84-C33-QR uniquely combines AEC-Q101 qualification, SOT23 compactness, and optimized leakage/noise behavior - making it the sole drop-in solution for automotive Zener reference designs requiring both size and reliability assurance.

Availability

PZU84-C33-QR is available at Aetrix Electronics and suitable for automotive ECU reference design, infotainment power rail clamping, and ADAS camera power conditioning requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for PZU84-C33-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 advanced packaging.

The PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio designed specifically for automotive voltage reference, clamping, and regulation functions where thermal stability and transient robustness are critical.

FAQ

What is the exact Zener voltage range for PZU84-C33-QR at 5 mA test current?

The guaranteed Zener voltage range is 31.0 V to 35.0 V at I_Z = 5 mA and T_j = 25 °C, per Table 8 of the Rev. 4 datasheet. This 4.0 V span reflects the ±5 % tolerance applied to the nominal 33 V rating, and remains valid across the full −55 °C to +150 °C operating ambient range.

Does Pin 2 require grounding or can it be left unconnected?

Pin 2 is explicitly designated "not connected" (n.c.) in the official pinning diagram and must remain electrically floating - no PCB trace, pull-up, pull-down, or ground connection is permitted. Connecting it risks internal shorting or parametric shift due to unintended parasitic coupling.

How does the PZU84-C33-QR differ from the PZU84-B33-Q variant?

PZU84-C33-QR uses intentional minor leakage current optimization for fast switching and noise reduction, while PZU84-B33-Q features ultra-low leakage (<0.1 μA) and harder breakdown for precision reference applications. Their differential resistances also differ: 250 Ω (C-series) vs. 200 Ω (B-series) at 5 mA.

Is reflow soldering profile information available for the SOT23 package?

Yes - Figure 10 provides the recommended reflow soldering footprint: 0.6 mm × 0.6 mm solder lands with 0.5 mm spacing, and Figure 11 specifies wave soldering dimensions. The device complies with JEDEC J-STD-020 moisture sensitivity level 1, permitting unlimited floor life at ≤30 °C/85 % RH.

PZU84-C33-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):: 33 V

Tolerance:: ±6.06%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 40 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 25 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-C33-QR FAQ

1.How can I place an order for PZU84-C33-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU84-C33-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-C33-QR reliable?

The price and inventory of PZU84-C33-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-C33-QR is usually 5 days.

3.What payment methods are accepted for PZU84-C33-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-C33-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU84-C33-QR?

PZU84-C33-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU84-C33-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-C33-QR?

For technical support, including PZU84-C33-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-C33-QR requirements.

6.How does Aetrix verify that PZU84-C33-QR is sourced from the original manufacturer or authorized distributors?

All PZU84-C33-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-C33-QR meets industry standards.

7.What is the process for return or replacement of PZU84-C33-QR?

All PZU84-C33-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-C33-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-C33-QR part is unused and in its original packaging.

Return procedure for PZU84-C33-QR:

1.Submit a request within 90 days.

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

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