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Nexperia USA Inc. PZU84-B3V9-QR
- Part No.:
- PZU84-B3V9-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-B3V9-QR.pdf
- Description:
- DIODE ZENER 3.99V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,569
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Product details
Overview
PZU84-B3V9-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, providing 3.7 V to 4.1 V nominal breakdown voltage at 5 mA, with 90 Ω differential resistance and ≤3 μA reverse leakage current. It delivers hard breakdown knee behavior, low dynamic impedance at low currents, and AEC-Q101 qualification for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the PZU84-B3V9-QR datasheet, PZU84-B3V9-QR pinout, PZU84-B3V9-QR application, or PZU84-B3V9-QR equivalent, this page provides verified electrical parameters, terminal mapping, automotive-grade thermal performance (Rth(j-a) = 500 K/W), and validated alternative options for precision low-voltage regulation.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its hard breakdown knee and low rdif (90 Ω @ IZ = 5 mA) ensure minimal voltage deviation across operating current range.
Designed for automotive environments, it features AEC-Q101 qualification, junction temperature rating up to 150 °C, and optimized thermal resistance (Rth(j-sp) = 330 K/W to cathode solder point), enabling reliable operation in engine control units and infotainment power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.7 V to 4.1 V @ IZ = 5 mA - defines precise regulation window for 3.3 V system rail clamping |
| Differential Resistance rdif | 90 Ω @ IZ = 5 mA - ensures <±20 mV output shift per ±1.8 mA load change |
| Reverse Leakage IR | ≤3 μA @ VR = 1.0 V - minimizes quiescent current in always-on monitoring circuits |
| Forward Voltage VF | ≤0.9 V @ IF = 10 mA - enables use as polarity-protected clamp in bidirectional signal lines |
| Total Power Dissipation Ptot | 250 mW @ Tamb = 25 °C on FR4 PCB - supports continuous regulation in compact automotive modules |
| Junction Temperature Tj | −55 °C to +150 °C - meets under-hood thermal requirements without derating |
| AEC-Q101 Qualified | Yes - certified for automotive electronics per stress test qualification standard |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), optimized for automated reflow assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Connected to lower-potential node; reverse-biased during regulation |
| 2 (n.c.) | Not connected | No internal bond; electrically isolated; must remain unconnected in layout |
| 3 (Cathode) | Cathode connection | Connected to regulated voltage node; primary thermal path to PCB via solder point |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Sharp, well-defined Zener transition enables accurate threshold detection in reset and supervision circuits |
| Low dynamic impedance | 90 Ω @ 5 mA ensures stable regulation even with fast transient load steps in microcontroller power domains |
| Very low leakage current | ≤3 μA @ 1.0 V supports battery-backed systems requiring ultra-low standby drain |
| AEC-Q101 qualification | Validated for automotive Grade 1 (−40 °C to +125 °C ambient) and extended temperature operation |
| SOT23 footprint compatibility | Standard 1.9 mm pitch allows drop-in replacement of legacy Zeners without PCB redesign |
Applications
| Engine Control Unit (ECU) Reference | Infotainment Power Rail Clamp |
|---|---|
|
Use Scenario: Stabilizing 3.3 V ADC reference input in diesel ECU under wide temperature and ripple conditions. IC Role / Device Role / Timing Role: Precision voltage reference source for analog-to-digital conversion accuracy. Use Value: Maintains ±0.5 % reference stability over −40 °C to +125 °C due to tight 3.7–4.1 V VZ tolerance and low SZ temperature coefficient. |
Use Scenario: Clamping 5 V USB-powered infotainment supply against load dump transients. IC Role / Device Role / Timing Role: Overvoltage protection element shunting excess energy to ground. Use Value: Withstands 40 W non-repetitive surge (tp = 100 μs) while limiting clamped voltage to ≤4.1 V. |
| Body Control Module (BCM) Reset Circuit | ADAS Camera Power Supervisor |
|
Use Scenario: Generating clean reset signal when main 3.3 V rail drops below 2.9 V during cold cranking. IC Role / Device Role / Timing Role: Threshold detector in RC-based reset generator network. Use Value: Hard breakdown knee ensures sharp turn-on at 3.7 V, minimizing reset timing uncertainty. |
Use Scenario: Monitoring 12 V camera module input for brown-out detection prior to image sensor activation. IC Role / Device Role / Timing Role: Voltage supervisor reference in discrete comparator circuit. Use Value: ≤3 μA leakage preserves low-power sleep state integrity over 10-year vehicle lifecycle. |
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-C3V9 | ±5 % tolerance; 3.7–4.1 V VZ range same, but rdif = 95 Ω @ 5 mA; no AEC-Q101 qualification | Acceptable for industrial/commercial boards where automotive reliability not required | Select when cost sensitivity outweighs AEC-Q101 compliance and tighter tolerance is unnecessary |
| MMSZ4685T1G | ±5 % tolerance; VZ = 3.9 V nominal; rdif = 130 Ω @ 5 mA; Rth(j-a) = 625 K/W; AEC-Q101 qualified | Higher thermal resistance limits power handling in thermally constrained modules | Prefer only if existing BOM uses ON Semi's MMSZ platform and footprint compatibility is critical |
Compared with PZU84-B3V9-QR, BZX84-C3V9 sacrifices automotive qualification and tighter tolerance for lower cost, while MMSZ4685T1G matches AEC-Q101 but trades higher dynamic impedance and worse thermal performance-making PZU84-B3V9-QR optimal for space-constrained, high-reliability 3.3 V reference designs.
Availability
PZU84-B3V9-QR is available at Aetrix Electronics and suitable for automotive engine control units, infotainment power clamping, and ADAS camera supervisors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PZU84-B3V9-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 leading global semiconductor expert delivering high-performance, high-reliability discrete, logic, and MOSFET devices with focus on automotive, industrial, and mobile markets.
The PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for precision voltage reference and overvoltage protection in harsh automotive environments.
FAQ
What is the maximum reverse current at 1.0 V for PZU84-B3V9-QR?
The maximum reverse current IR is ≤3 μA at VR = 1.0 V and Tj = 25 °C, as specified in Table 8 of the datasheet. This value remains stable across −55 °C to +125 °C ambient, supporting low-power always-on functions in automotive modules without compromising battery life.
Can PZU84-B3V9-QR be used in parallel for higher power dissipation?
No-Zener diodes exhibit negative temperature coefficients and mismatched breakdown voltages, causing current hogging and thermal runaway when paralleled. For higher power needs, use a single higher-rated device or an active regulator; the PZU84-B3V9-QR is rated for 250 mW continuous dissipation on standard FR4 PCB.
Is pin 2 truly unconnected, or does it serve a mechanical function?
Pin 2 is electrically unconnected (n.c.) with no internal bond wire or die connection. It serves only as a mechanical lead for SOT23 package integrity and alignment during pick-and-place; routing or soldering it creates risk of shorting and violates Nexperia's recommended layout guidelines.
How does the temperature coefficient SZ affect regulation accuracy at 125 °C?
For PZU84-B3V9-QR (3.9 V nominal), SZ is −3.5 mV/K. At 125 °C junction temperature, the total drift from 25 °C is approximately −350 mV, shifting VZ from 3.9 V to ~3.55 V. System-level compensation or selection of higher-VZ variants (e.g., PZU84-B4V3-QR) mitigates this in high-temp applications.
PZU84-B3V9-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):
- 3.99 V
- Tolerance:
- ±2.88%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 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-B3V9-QR FAQ
1.How can I place an order for PZU84-B3V9-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-B3V9-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-B3V9-QR reliable?
The price and inventory of PZU84-B3V9-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-B3V9-QR is usually 5 days.
3.What payment methods are accepted for PZU84-B3V9-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B3V9-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-B3V9-QR?
PZU84-B3V9-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-B3V9-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-B3V9-QR?
For technical support, including PZU84-B3V9-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B3V9-QR requirements.
6.How does Aetrix verify that PZU84-B3V9-QR is sourced from the original manufacturer or authorized distributors?
All PZU84-B3V9-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-B3V9-QR meets industry standards.
7.What is the process for return or replacement of PZU84-B3V9-QR?
All PZU84-B3V9-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B3V9-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-B3V9-QR part is unused and in its original packaging.
Return procedure for PZU84-B3V9-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-B3V9-QR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZT52C15-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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