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Nexperia USA Inc. PZU84-C3V9-QR
- Part No.:
- PZU84-C3V9-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-C3V9-QR.pdf
- Description:
- DIODE ZENER 3.9V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,108
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Product details
Overview
PZU84-C3V9-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 3.7 V to 4.1 V nominal breakdown at 5 mA, with 90 Ω typical differential resistance, 3 μA max reverse leakage at 1 V, and qualified to AEC-Q101 for automotive power rail stabilization.
For engineers reviewing the PZU84-C3V9-QR datasheet, PZU84-C3V9-QR pinout, PZU84-C3V9-QR application, or PZU84-C3V9-QR equivalent, this part supports precision low-voltage reference generation, ECU voltage clamping, and sensor biasing where tight tolerance, low dynamic impedance, and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse breakdown mode with hard knee characteristics, optimized for stable regulation at low currents (IZ = 0.5 mA to 5 mA). Its −3.5 mV/K temperature coefficient ensures predictable drift over −55 °C to +150 °C ambient range.
Designed for surface-mount use on FR4 PCBs with standard SOT23 footprint, it delivers 250 mW steady-state dissipation and withstands 40 W non-repetitive surge (tp = 100 μs), supporting transient protection in 12 V automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.7 V to 4.1 V at IZ = 5 mA - defines precise clamping threshold for 3.3 V system rails |
| Tolerance | ±2 % - enables accurate voltage reference without post-production trimming |
| Differential Resistance (rdif) | 90 Ω typ. at IZ = 5 mA - ensures minimal output voltage shift under load variation |
| Reverse Leakage (IR) | 3 μA max at VR = 1 V - reduces quiescent current loss in battery-sensitive modules |
| Power Dissipation (Ptot) | 250 mW at Tamb = 25 °C - supports continuous regulation on standard 70 μm copper FR4 layout |
| Junction Temperature (Tj) | −55 °C to +150 °C - meets under-hood thermal requirements per AEC-Q101 stress testing |
| Package | SOT23 - 2.9 mm × 1.3 mm × 1 mm body, 1.9 mm pin pitch, compatible with automated reflow assembly |
Pinout & Package
SOT23 plastic surface-mounted package with 3 terminals, 1.9 mm pitch, and standard footprint per Figure 10 (reflow) and Figure 11 (wave soldering) in the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node during regulation |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or pad required |
| 3 | Cathode (K) | Reverse-biased terminal; ties to regulated voltage rail or clamp point |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Enables sharp, repeatable conduction onset at VZ - critical for clean voltage limiting in ECU power domains |
| AEC-Q101 qualification | Validated for automotive use including high-temperature storage, temperature cycling, and HTRB - eliminates need for additional qualification effort |
| Low dynamic impedance | 90 Ω at 5 mA - maintains <10 mV output deviation across ±1 mA load step changes |
| Low leakage current | ≤3 μA at 1 V reverse bias - preserves battery life in always-on vehicle modules |
| E24 voltage coverage | 3.9 V nominal option within 2.4 V–51 V range - matches common microcontroller I/O and sensor supply levels |
Applications
| Automotive ECU Power Rail Clamp | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Clamping 12 V supply transients in engine control unit power distribution network. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to limit voltage spikes to ≤4.1 V at critical logic inputs. Use Value: Prevents latch-up or damage to 3.3 V MCU I/O pins during load dump events without requiring active circuitry. |
Use Scenario: Providing stable 3.9 V bias for analog front-end of pressure sensor in HVAC control module. IC Role / Device Role / Timing Role: Passive voltage reference establishing fixed bias point for sensor excitation circuitry. Use Value: Maintains sensor accuracy within ±0.5 % full-scale error across −40 °C to +125 °C due to tight VZ tolerance and low tempco. |
| USB-C Port Overvoltage Protection | Smart Lighting LED Current Setpoint |
Use Scenario: Protecting USB-C PD controller IC from >5.5 V surges on VBUS line. IC Role / Device Role / Timing Role: Fast-acting shunt regulator clamping VBUS to 4.1 V before internal LDO fails. Use Value: Achieves sub-100 ns response to 100 V/μs transients using inherent junction capacitance of 370 pF at 0 V. |
Use Scenario: Setting reference voltage for constant-current driver controlling automotive interior LED strips. IC Role / Device Role / Timing Role: Precision shunt element defining feedback threshold for current-sense amplifier. Use Value: Enables ±2 % LED brightness consistency across production batches without calibration. |
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-C3V9,115 | ±5 % tolerance, 100 Ω rdif at 5 mA, 5 μA IR at 1 V | Higher VZ uncertainty and leakage - suitable only for non-critical biasing | Select when cost sensitivity outweighs regulation precision and automotive qualification is not required |
| MMSZ4685T1G | ±5 % tolerance, 95 Ω rdif, 500 nA IR at 1 V, SOD-123 package | Lower leakage but larger footprint and no AEC-Q101 rating | Prefer for ultra-low-power IoT sensors where space permits and automotive compliance is unnecessary |
Compared with BZX84-C3V9,115 and MMSZ4685T1G, PZU84-C3V9-QR uniquely combines ±2 % tolerance, AEC-Q101 qualification, and SOT23 size-making it the only choice for automotive-grade 3.9 V clamping where board space, precision, and reliability are jointly constrained.
Availability
PZU84-C3V9-QR is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and smart lighting control systems requiring stable component supply with guaranteed long-term availability.
Supply support for PZU84-C3V9-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-enhancing components, delivering high-performance, reliable, and scalable solutions for automotive, industrial, and consumer markets.
The PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh automotive environments.
FAQ
What is the maximum continuous reverse current the PZU84-C3V9-QR can sustain without degradation?
The device supports up to 200 mA forward current per Absolute Maximum Ratings, but for Zener operation, sustained reverse current is limited by power dissipation: at 25 °C ambient, 5 mA yields ~20 mW, well within the 250 mW Ptot limit. Continuous IZ above 50 mA requires derating per Rth(j-a) = 500 K/W to avoid exceeding 150 °C junction temperature.
Does the 'QR' suffix indicate tape-and-reel packaging or a specific quality grade?
The 'QR' suffix denotes Nexperia's automotive-grade ordering variant-fully AEC-Q101 qualified, manufactured in IATF 16949-certified facilities, and supplied in moisture-sensitive level 1 (MSL1) tape-and-reel format compliant with J-STD-020. It is not a generic packaging indicator but a defined automotive product version.
Can PZU84-C3V9-QR be used in parallel for higher power handling?
No-Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances, causing current hogging when paralleled. The datasheet does not recommend parallel operation. For higher power, select a single higher-rated Zener (e.g., PZU12-C3V9-QR) or implement active regulation with a transistor-based shunt.
How does the 'n.c.' pin (Pin 2) affect PCB layout and thermal performance?
Pin 2 is internally unconnected and must remain electrically floating-no trace, pad, or solder mask opening is required. Leaving it unconnected avoids parasitic coupling and preserves the specified Rth(j-sp) = 330 K/W (measured at cathode tab), ensuring accurate thermal modeling for junction temperature estimation.
PZU84-C3V9-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):
- 3.9 V
- Tolerance:
- ±5.13%
- 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-C3V9-QR FAQ
1.How can I place an order for PZU84-C3V9-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-C3V9-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-C3V9-QR reliable?
The price and inventory of PZU84-C3V9-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-C3V9-QR is usually 5 days.
3.What payment methods are accepted for PZU84-C3V9-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-C3V9-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-C3V9-QR?
PZU84-C3V9-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-C3V9-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-C3V9-QR?
For technical support, including PZU84-C3V9-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-C3V9-QR requirements.
6.How does Aetrix verify that PZU84-C3V9-QR is sourced from the original manufacturer or authorized distributors?
All PZU84-C3V9-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-C3V9-QR meets industry standards.
7.What is the process for return or replacement of PZU84-C3V9-QR?
All PZU84-C3V9-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-C3V9-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-C3V9-QR part is unused and in its original packaging.
Return procedure for PZU84-C3V9-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-C3V9-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
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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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
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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