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Nexperia USA Inc. PZU84-C18-QR
- Part No.:
- PZU84-C18-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-C18-QR.pdf
- Description:
- DIODE ZENER 17.99V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,308
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Product details
Overview
PZU84-C18-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 18 V nominal breakdown voltage at IZ = 5 mA, with differential resistance ≤80 Ω, reverse leakage ≤20 μA at VR = 13 V, and qualified to AEC-Q101 for automotive power rail stabilization.
For engineers reviewing the PZU84-C18-QR datasheet, PZU84-C18-QR pinout, PZU84-C18-QR application, or PZU84-C18-QR equivalent, this page delivers verified Zener parameters, automotive-grade thermal limits, SOT23 terminal mapping, and direct alternatives for voltage reference and overvoltage protection design.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable 18 V regulation across load variations using controlled avalanche breakdown. Its hard breakdown knee ensures low dynamic impedance (≤80 Ω at 5 mA) and minimal voltage drift under transient current changes.
Designed for automotive environments, it features intentional low leakage (≤20 μA at 13 V) and a temperature coefficient of +13 mV/K at 5 mA, enabling predictable drift compensation in engine control and body electronics circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 16.94 V to 19.03 V at IZ = 5 mA - defines tight 18 V regulation window for precision biasing |
| Differential Resistance rdif | ≤80 Ω at IZ = 5 mA - ensures minimal output voltage shift under load current variation |
| Reverse Leakage IR | ≤20 μA at VR = 13 V - reduces quiescent power loss in always-on automotive modules |
| Power Dissipation Ptot | 250 mW on FR4 PCB - sets maximum continuous DC power handling in standard layout |
| Non-repetitive Peak Power | 40 W at tp = 100 μs - enables robust ESD/surge clamping without failure |
| Junction Temperature | −55 °C to +150 °C - supports operation in under-hood and transmission control units |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing per IEC 60134 |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided 70 μm copper PCB mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased input terminal; connects to lower-potential node in shunt regulation |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask required |
| 3 | Cathode (K) | Zener breakdown terminal; connects to regulated voltage rail and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % VZ tolerance | Enables accurate 18 V reference without post-production trimming in ADAS sensor supplies |
| Hard breakdown knee | Delivers sharp turn-on at 18 V, minimizing regulation hysteresis in battery monitoring circuits |
| Low rdif (≤80 Ω) | Maintains <±15 mV output deviation across 1–10 mA load current swings |
| AEC-Q101 qualification | Validated for 1000-hour high-temperature operating life and temperature cycling in automotive ECUs |
| 150 °C max junction temp | Supports placement near power MOSFETs in motor drive inverters without derating |
Applications
| Engine Control Unit (ECU) Reference | Infotainment Power Sequencing |
|---|---|
Use Scenario: Providing stable 18 V bias to analog front-end op-amps in knock sensor signal conditioning. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail upstream of ADC driver stage. Use Value: Tight ±2 % VZ and low rdif ensure <0.5 LSB gain error across −40 °C to +125 °C ambient. |
Use Scenario: Enabling controlled 18 V rail startup sequence before enabling USB-C PD controller IC. IC Role / Device Role / Timing Role: Voltage threshold detector triggering enable signal via comparator input. Use Value: Hard breakdown knee guarantees clean 18 V transition edge, eliminating false wake-up during cold cranking. |
| Body Control Module (BCM) Overvoltage Clamp | ADAS Camera Module Bias Supply |
Use Scenario: Clamping transients on 12 V vehicle bus during load dump events in door module microcontroller supply. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 40 W non-repetitive surges per IEC 61000-4-5. Use Value: 40 W peak power rating and 150 °C Tj allow single-device clamping without thermal shutdown. |
Use Scenario: Generating precise 18 V bias for CCD image sensor analog chain in rear-view camera. IC Role / Device Role / Timing Role: Low-noise Zener reference replacing bulkier three-terminal regulator for space-constrained flex PCB. Use Value: ≤20 μA leakage and +13 mV/K TC enable stable pixel gain calibration across parking-to-highway temperature ranges. |
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-C18-TP | ±5 % tolerance, higher rdif (≤100 Ω), no AEC-Q101 qualification | Acceptable for consumer-grade power supplies but not automotive ECU reference rails | Select only for cost-sensitive non-automotive designs where ±5 % VZ meets system accuracy budget |
| MMSZ5245B-TP | ±5 % tolerance, 200 mW Ptot, SOD-123 package (larger footprint) | Limited surge capability (25 W vs. 40 W); unsuitable for load dump clamping | Prefer when board space allows larger package and AEC-Q101 compliance is not required |
Availability
PZU84-C18-QR is available at Aetrix Electronics and suitable for engine control units, infotainment power sequencing, and ADAS camera bias supplies requiring stable component supply with full automotive qualification traceability.
Supply support for PZU84-C18-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 logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components.
The PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for stable voltage reference and transient suppression in harsh automotive environments.
FAQ
What is the exact Zener voltage range for PZU84-C18-QR at 5 mA test current?
The confirmed Zener voltage range is 16.94 V to 19.03 V at IZ = 5 mA and Tj = 25 °C, per Table 8 of the Rev. 4 datasheet. This 2.09 V span reflects the ±2 % tolerance around the nominal 18 V rating and is measured under standardized pulse conditions (tp ≤ 300 μs, duty cycle ≤ 0.02).
Can PZU84-C18-QR replace a 1N4746A in an automotive circuit?
No-PZU84-C18-QR is not a drop-in replacement for 1N4746A. While both regulate at ~18 V, the 1N4746A uses DO-41 package (through-hole), has ±5 % tolerance, and lacks AEC-Q101 qualification. PZU84-C18-QR requires SOT23 footprint, offers ±2 % tolerance, and is validated for automotive thermal and lifetime stress, making it incompatible with legacy through-hole layouts.
What is the maximum allowable forward current for PZU84-C18-QR?
The absolute maximum forward current is 200 mA, per Table 5 (Limiting Values). However, forward conduction is not its intended operating mode; the device is designed for reverse-bias Zener regulation. Continuous forward current above 10 mA risks exceeding 250 mW total power dissipation on standard FR4 PCB, potentially degrading long-term reliability.
Does PZU84-C18-QR require a heatsink in standard automotive PCB layouts?
No external heatsink is required. With Rth(j-a) = 500 K/W on standard FR4 (single-sided 70 μm Cu), the junction-to-ambient rise is ≤125 °C at 250 mW dissipation-within the 150 °C Tj limit. Thermal performance is optimized by using the cathode pad (Pin 3) as primary heat path, with Rth(j-sp) = 330 K/W to solder point.
PZU84-C18-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):
- 17.99 V
- Tolerance:
- ±5.81%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 13 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-C18-QR FAQ
1.How can I place an order for PZU84-C18-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-C18-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-C18-QR reliable?
The price and inventory of PZU84-C18-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-C18-QR is usually 5 days.
3.What payment methods are accepted for PZU84-C18-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-C18-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-C18-QR?
PZU84-C18-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-C18-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-C18-QR?
For technical support, including PZU84-C18-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-C18-QR requirements.
6.How does Aetrix verify that PZU84-C18-QR is sourced from the original manufacturer or authorized distributors?
All PZU84-C18-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-C18-QR meets industry standards.
7.What is the process for return or replacement of PZU84-C18-QR?
All PZU84-C18-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-C18-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-C18-QR part is unused and in its original packaging.
Return procedure for PZU84-C18-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-C18-QR Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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