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

Nexperia USA Inc. PZU84-C20-QR

Name: PZU84-C20-QR
Brand: Nexperia USA Inc.
SKU: PZU84-C20-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZU84-C20-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: PZU84-C20-QR.pdf

Description:: DIODE ZENER 19.97V 250MW TO236AB

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Product details

Overview

PZU84-C20-QR from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 package, rated for 20 V nominal breakdown voltage (18.86–21.08 V), 250 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It delivers low dynamic impedance (100 Ω at I_Z = 5 mA), low leakage (≤0.05 μA at V_R = 15 V), and hard breakdown knee-optimized for precision voltage reference and overvoltage protection in engine control units.

For engineers reviewing the PZU84-C20-QR datasheet, PZU84-C20-QR pinout, PZU84-C20-QR application, or PZU84-C20-QR equivalent, this device supports stable 20 V regulation under transient loads, meets automotive thermal cycling requirements (−55 °C to +150 °C ambient), and provides traceable sourcing with AEC-Q101 qualification evidence.

Technical Context

This Zener diode operates in reverse-bias breakdown mode with a specified nominal working voltage of 20 V and differential resistance of 100 Ω at 5 mA test current. Its temperature coefficient is +14.4 mV/K at 5 mA, indicating positive drift with junction temperature rise.

The device features a not-connected (n.c.) terminal (Pin 2) to enable optimized thermal performance and reduce parasitic capacitance; its cathode (Pin 3) serves as the primary solder point with R_th(j-sp) = 330 K/W, supporting reliable surge handling up to 40 W for 100 μs pulses.

Key Specifications

Parameter	Value and Actual Design Meaning
Breakdown Voltage V_Z	18.86–21.08 V at I_Z = 5 mA; ensures ±5 % tolerance compliance for 20 V regulation targets
Differential Resistance r_dif	100 Ω at I_Z = 5 mA; maintains stable output under load variation in feedback loops
Reverse Leakage I_R	≤0.05 μA at V_R = 15 V; minimizes standby current in battery-powered systems
Total Power Dissipation P_tot	250 mW on FR4 PCB with 70 μm copper; defines continuous DC operating limit at 25 °C ambient
Junction Temperature T_j	−55 °C to +150 °C; enables operation in under-hood automotive environments
Non-repetitive Peak Power P_ZSM	40 W for 100 μs square wave; supports ESD and load-dump transient suppression
Thermal Resistance R_th(j-a)	500 K/W in free air; informs derating curves for convection-cooled PCB layouts

Pinout & Package

SOT23 plastic surface-mount 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 circuits
2	Not Connected (n.c.)	Internally unconnected; reduces parasitic capacitance and improves thermal isolation
3	Cathode (K)	Reverse-biased terminal; primary heat path to PCB via solder point (R_th(j-sp) = 330 K/W)

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces
Hard breakdown knee	Sharp, low-noise transition into regulation-critical for precision reference and comparator thresholding
Low dynamic impedance	100 Ω at 5 mA enables <1 % output deviation across 1–10 mA load range in shunt regulators
Optimized leakage profile	≤0.05 μA at 15 V reverse bias preserves battery life in always-on vehicle modules
Thermal robustness	150 °C max junction temperature supports operation near powertrain ECUs without forced cooling

Applications

Engine Control Unit (ECU) Reference

Automotive CAN Transceiver Bias

Use Scenario: Provides stable 20 V reference for microcontroller ADC calibration and sensor signal conditioning in gasoline/diesel engine ECUs.

IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail for analog front-end circuitry.

Use Value: Maintains <±0.5 % reference accuracy across −40 °C to +125 °C ambient due to tight V_Z tolerance and low r_dif.

Use Scenario: Supplies regulated bias voltage to isolated CAN transceiver V_IO pins in gateway modules.

IC Role / Device Role / Timing Role: Low-noise Zener clamp ensuring clean logic-level translation between MCU and physical layer.

Use Value: Hard breakdown knee prevents signal distortion during high-speed CAN FD bit transitions (up to 5 Mbps).

Infotainment System Overvoltage Protection

ADAS Camera Module Voltage Clamp

Use Scenario: Clamps 12 V supply rail surges during load dump events in head unit power management.

IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 40 W non-repetitive pulses per ISO 7637-2.

Use Value: Withstands 100 μs, 40 W surges without degradation-verified per AEC-Q101 stress testing.

Use Scenario: Stabilizes 20 V bias for image sensor analog supply in surround-view camera modules.

IC Role / Device Role / Timing Role: Precision shunt regulator maintaining constant V_DD for CMOS image sensor pixel array.

Use Value: Low 0.05 μA leakage prevents dark current increase in low-light imaging conditions.

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-C20	±5 % tolerance, same 20 V nominal, but only AEC-Q101 qualified in BZX84-C20,115 variant-not standard BZX84-C20	Lacks full AEC-Q101 documentation traceability; limited surge rating (P_ZSM = 25 W)	Select when cost sensitivity outweighs automotive qualification requirements
MMSZ5249B	±5 % tolerance, 20 V nominal, but higher r_dif (150 Ω), higher leakage (≤1.0 μA at 15 V), no AEC-Q101 claim	Unsuitable for safety-critical automotive zones; requires additional filtering for noise-sensitive analog rails	Choose for industrial consumer-grade designs where AEC-Q101 is not mandated

Compared with BZX84-C20 and MMSZ5249B, PZU84-C20-QR delivers verified AEC-Q101 compliance, superior 40 W surge capability, and lower leakage-making it the only option qualified for direct integration into ASIL-B–related power domains without external validation.

Availability

PZU84-C20-QR is available at Aetrix Electronics and suitable for automotive ECU design, infotainment system protection, and ADAS camera module voltage regulation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PZU84-C20-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 technologies, delivering high-performance, high-reliability discrete and logic devices for automotive, industrial, and mobile markets.

The PZU84-Q series belongs to Nexperia's AEC-Q101–qualified Zener regulator portfolio, engineered specifically for automotive voltage reference and transient protection in harsh-environment electronic control units.

FAQ

What is the maximum continuous reverse current the PZU84-C20-QR can sustain without exceeding its 250 mW power limit?

At 20 V nominal breakdown, the maximum continuous reverse current is 12.5 mA (250 mW ÷ 20 V). This assumes T_amb = 25 °C on a standard FR4 PCB; derating is required above 25 °C per the 500 K/W thermal resistance specification.

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

Pin 2 is internally unconnected and must remain un-soldered. Leaving it floating reduces parasitic capacitance by ~10 pF versus grounded alternatives and isolates the thermal path-ensuring heat flows exclusively through the cathode (Pin 3) to the PCB, preserving the specified 330 K/W R_th(j-sp).

Is PZU84-C20-QR suitable for bidirectional transient suppression like TVS diodes?

No-it is a unidirectional Zener diode optimized for reverse-bias regulation. It lacks the symmetrical clamping behavior and high peak pulse current rating of dedicated TVS devices. For bidirectional surge protection, pair it with a series diode or select a dedicated automotive TVS such as PESD5V0S1BA.

Does the +14.4 mV/K temperature coefficient require compensation in precision reference designs?

Yes-this positive coefficient causes V_Z to rise ~288 mV over a 20 °C junction temperature swing. For sub-0.1 % stability, designers must either operate at constant T_j, add negative-TC components in series, or implement software-based temperature correction using onboard thermistor readings.

PZU84-C20-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):: 19.97 V

Tolerance:: ±5.56%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 20 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 15 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-C20-QR FAQ

1.How can I place an order for PZU84-C20-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU84-C20-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-C20-QR reliable?

The price and inventory of PZU84-C20-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-C20-QR is usually 5 days.

3.What payment methods are accepted for PZU84-C20-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-C20-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU84-C20-QR?

PZU84-C20-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU84-C20-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-C20-QR?

For technical support, including PZU84-C20-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-C20-QR requirements.

6.How does Aetrix verify that PZU84-C20-QR is sourced from the original manufacturer or authorized distributors?

All PZU84-C20-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-C20-QR meets industry standards.

7.What is the process for return or replacement of PZU84-C20-QR?

All PZU84-C20-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-C20-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-C20-QR part is unused and in its original packaging.

Return procedure for PZU84-C20-QR:

1.Submit a request within 90 days.

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

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