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Nexperia USA Inc. PZU84-C4V3-QR
- Part No.:
- PZU84-C4V3-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-C4V3-QR.pdf
- Description:
- DIODE ZENER 4.25V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,551
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Product details
Overview
PZU84-C4V3-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 4.01 V to 4.48 V nominal breakdown at 5 mA, with 90 Ω differential resistance, 3 μA reverse leakage at 1 V, and AEC-Q101 qualification for automotive power rail stabilization.
For engineers reviewing the PZU84-C4V3-QR datasheet, PZU84-C4V3-QR pinout, PZU84-C4V3-QR application, or PZU84-C4V3-QR equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance at low bias current, thermal resistance (330 K/W junction-to-solder-point), and automotive-grade reliability validation per AEC-Q101.
Technical Context
This Zener diode operates in reverse breakdown mode to clamp and regulate voltage across sensitive circuit nodes, delivering stable reference voltage under varying load and temperature conditions. Its hard breakdown knee and low leakage support precision biasing in analog sensor interfaces and microcontroller reset circuits.
Designed for automotive environments, it features intentional low-current performance optimization: 90 Ω dynamic impedance at IZ = 5 mA and ≤3 μA reverse current at VR = 1 V ensure minimal quiescent error in low-power monitoring paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.01 V to 4.48 V at IZ = 5 mA - defines precise clamping threshold for 5 V rail supervision |
| Tolerance | ±2 % - enables tight voltage margin control in safety-critical automotive subsystems |
| Differential Resistance (rdif) | 90 Ω at IZ = 5 mA - ensures minimal output voltage shift under load transients |
| Reverse Leakage (IR) | ≤3 μA at VR = 1 V - reduces standby power loss in always-on vehicle modules |
| Power Dissipation (Ptot) | 250 mW on FR4 PCB - supports continuous regulation in compact ECU designs without heatsinking |
| Junction Temperature (Tj) | −55 °C to +150 °C - guarantees operation across full automotive ambient range |
| Thermal Resistance (Rth(j-sp)) | 330 K/W - enables accurate thermal modeling of solder-point heating during surge events |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in reverse-regulation configuration |
| 2 | Not Connected (n.c.) | Electrically isolated; no internal bond wire; must remain unconnected in PCB layout |
| 3 | Cathode (K) | Reverse-biased terminal; ties to regulated voltage rail and provides Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Sharp, well-defined Zener transition minimizes voltage hysteresis in overvoltage protection circuits |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity testing, and mechanical shock per standard |
| Low dynamic impedance at 5 mA | 90 Ω enables <10 mV output variation across ±1 mA load changes in reference supply applications |
| Optimized low-leakage performance | ≤3 μA at 1 V reverse bias preserves battery life in always-on vehicle modules (e.g., CAN wake-up receivers) |
| SOT23 footprint compatibility | Standard 3-pin SMT outline allows drop-in replacement in space-constrained PCB layouts |
Applications
| Engine Control Unit (ECU) Power Monitoring | Automotive Cabin Sensor Biasing |
|---|---|
|
Use Scenario: Real-time 5 V rail voltage supervision in engine management systems to trigger fault logging or safe shutdown. IC Role / Device Role / Timing Role: Zener clamping element providing precise 4.3 V reference for comparator input in power-good detection circuitry. Use Value: ±2 % tolerance and 90 Ω dynamic impedance ensure <±15 mV trip point accuracy across −40 °C to +125 °C operating range. |
Use Scenario: Stable bias voltage generation for MEMS pressure and temperature sensors in HVAC control modules. IC Role / Device Role / Timing Role: Low-leakage Zener regulator supplying clean 4.3 V reference to analog front-end amplifiers and ADC references. Use Value: ≤3 μA reverse leakage at 1 V prevents signal drift in high-impedance sensor bias networks during sleep mode. |
| Infotainment System Reset Circuit | ADAS Camera Module Voltage Clamp |
|
Use Scenario: Brown-out detection for microcontroller reset assertion when main 5 V supply dips below operational threshold. IC Role / Device Role / Timing Role: Zener diode configured as shunt regulator feeding RC delay network into reset controller input. Use Value: Hard breakdown knee ensures fast, repeatable reset activation with <100 ns response to voltage sag events. |
Use Scenario: Transient overvoltage suppression on image sensor power lines exposed to ESD and load dump pulses. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing 40 W non-repetitive surges (100 μs square wave) without degradation. Use Value: 40 W peak reverse power rating and 330 K/W junction-to-solder-point thermal resistance enable robust surge handling without thermal runaway. |
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-C4V3,115 | ±5 % tolerance, 100 Ω rdif at 5 mA, 5 μA IR at 1 V | Lower cost; suitable for non-safety-critical consumer applications | Select when AEC-Q101 qualification and tighter tolerance are not required |
| MMSZ4V3ET1G | ±5 % tolerance, 90 Ω rdif, 5 μA IR, SOD-123 package | Larger footprint; higher thermal resistance (400 K/W j-a); no AEC-Q101 validation | Choose only if SOT23 mounting is unavailable and automotive qualification is waived |
Compared with PZU84-C4V3-QR, BZX84-C4V3,115 trades ±2 % tolerance and AEC-Q101 compliance for cost, while MMSZ4V3ET1G sacrifices automotive qualification and thermal performance for legacy package compatibility-neither matches the combined precision, leakage, and qualification profile of the PZU84-C4V3-QR.
Availability
PZU84-C4V3-QR is available at Aetrix Electronics and suitable for automotive ECU power monitoring, infotainment reset circuits, and ADAS camera module clamping requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for PZU84-C4V3-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, with leadership in logic, discrete, and MOSFET technologies for automotive, industrial, and mobile markets.
The PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for reliable voltage regulation and transient suppression in harsh automotive environments.
FAQ
What is the maximum reverse voltage this Zener diode can withstand before breakdown?
The PZU84-C4V3-QR has a nominal Zener voltage range of 4.01 V to 4.48 V at 5 mA test current. Its breakdown is intentionally designed to occur within this band; applying reverse voltage significantly above 4.48 V risks exceeding its 250 mW steady-state power limit or triggering non-uniform conduction. Absolute maximum reverse voltage is not specified-operation must remain within the defined Zener working range and power derating curves.
Does this part support bidirectional ESD protection?
No. The PZU84-C4V3-QR is a unidirectional Zener diode optimized for reverse-bias voltage regulation only. It conducts predictably in reverse breakdown but lacks symmetrical clamping characteristics required for bidirectional ESD protection. For such applications, purpose-built TVS diodes like PESD5V0S1BA should be used instead.
How does the "n.c." pin affect PCB layout and thermal design?
Pin 2 is internally not connected and must remain unbonded and unconnected on the PCB. Routing traces or copper pours to it introduces parasitic capacitance and potential contamination risk. Thermal design must treat it as electrically inert-no thermal vias or copper spreading should be assigned to this pad, as heat transfer occurs exclusively through pins 1 (anode) and 3 (cathode), especially the cathode tab which anchors Rth(j-sp) = 330 K/W.
Is the ±2 % tolerance maintained across temperature and current variations?
The ±2 % tolerance applies strictly at Tj = 25 °C and IZ = 5 mA per datasheet test condition. Over temperature (−55 °C to +150 °C) and current (0.5 mA to 20 mA), the actual VZ shifts per its temperature coefficient (−3.5 mV/K typical for this voltage grade) and dynamic resistance (90 Ω). Full variation must be calculated using published SZ and rdif data-not assumed constant.
PZU84-C4V3-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):
- 4.25 V
- Tolerance:
- ±5.53%
- 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-C4V3-QR FAQ
1.How can I place an order for PZU84-C4V3-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-C4V3-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-C4V3-QR reliable?
The price and inventory of PZU84-C4V3-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-C4V3-QR is usually 5 days.
3.What payment methods are accepted for PZU84-C4V3-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-C4V3-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-C4V3-QR?
PZU84-C4V3-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-C4V3-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-C4V3-QR?
For technical support, including PZU84-C4V3-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-C4V3-QR requirements.
6.How does Aetrix verify that PZU84-C4V3-QR is sourced from the original manufacturer or authorized distributors?
All PZU84-C4V3-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-C4V3-QR meets industry standards.
7.What is the process for return or replacement of PZU84-C4V3-QR?
All PZU84-C4V3-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-C4V3-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-C4V3-QR part is unused and in its original packaging.
Return procedure for PZU84-C4V3-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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