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Nexperia USA Inc. PZU84-B4V7-QR
- Part No.:
- PZU84-B4V7-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-B4V7-QR.pdf
- Description:
- DIODE ZENER 4.65V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,388
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Product details
Overview
PZU84-B4V7-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 4.7 V nominal breakdown voltage at 5 mA, with differential resistance of 800 Ω (IZ = 5 mA), leakage current ≤2 μA at VR = 1 V, and qualified to AEC-Q101 for automotive power rail stabilization.
For engineers reviewing the PZU84-B4V7-QR datasheet, PZU84-B4V7-QR pinout, PZU84-B4V7-QR application, or PZU84-B4V7-QR equivalent, this device serves as a precision low-current voltage reference in ECU power management, sensor biasing, and overvoltage clamping circuits where tight tolerance and low dynamic impedance are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a hard knee characteristic, optimized for stable regulation at low currents (IZ = 0.5 mA to 5 mA). Its temperature coefficient is −3.5 mV/K at IZ = 5 mA, enabling predictable drift compensation in ambient ranges from −55 °C to +150 °C.
Designed for automotive-grade reliability, it supports non-repetitive surge handling up to 40 W (tp = 100 μs) and maintains thermal resistance Rth(j-a) = 500 K/W on standard FR4 PCBs - critical for under-hood thermal environments without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.42 V to 4.90 V at IZ = 5 mA - defines precise clamping threshold for 4.7 V nominal rail protection |
| Differential Resistance rdif | 800 Ω at IZ = 5 mA - ensures minimal output voltage shift under load variation |
| Reverse Leakage IR | ≤2 μA at VR = 1 V - enables ultra-low quiescent current in always-on monitoring circuits |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - supports bidirectional transient suppression when used with series resistor |
| Power Dissipation Ptot | 250 mW at Tamb = 25 °C - sets maximum continuous DC regulation capability on standard PCB layout |
| Junction Temperature Tj | −55 °C to +150 °C - guarantees operation across full automotive under-hood temperature range |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test qualification for discrete semiconductors |
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 assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Connected to lower-potential node in reverse-bias configuration; must be routed with low-inductance path for transient response |
| 2 (n.c.) | Not connected | Internally unconnected terminal - must remain floating; no solder mask or trace required |
| 3 (Cathode) | Cathode connection | Connected to regulated voltage node; serves as thermal path to PCB copper via solder point (Rth(j-sp) = 330 K/W) |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables accurate 4.7 V reference without post-production trimming in safety-critical sensor interfaces |
| Hard breakdown knee | Ensures rapid transition into regulation at low current (IZ ≥ 0.5 mA), improving start-up stability in low-power ECUs |
| Very low leakage current | ≤2 μA at VR = 1 V minimizes standby power loss in battery-backed systems and telematics modules |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per industry standard |
| Low differential impedance at low current | 800 Ω at IZ = 5 mA provides tighter regulation than standard ±5 % variants in 1–10 mA operating range |
Applications
| Engine Control Unit (ECU) Power Monitoring | Automotive Cabin Sensor Biasing |
|---|---|
|
Use Scenario: Real-time monitoring of 5 V microcontroller supply rail for brown-out detection. IC Role / Device Role / Timing Role: Zener clamp referenced against comparator input to trigger reset when rail drops below 4.7 V ±2 %. Use Value: Tight tolerance ensures reset activation within 50 mV of nominal threshold, preventing false triggers during transients. |
Use Scenario: Providing stable bias voltage to analog-output oxygen and pressure sensors. IC Role / Device Role / Timing Role: Low-leakage Zener reference source for sensor excitation circuitry in HVAC and airbag subsystems. Use Value: ≤2 μA leakage preserves accuracy of µA-level sensor output signals over temperature and lifetime. |
| Infotainment System Overvoltage Protection | ADAS Camera Module Voltage Clamping |
|
Use Scenario: Clamp transient spikes on 3.3 V I/O lines caused by hot-plug events or ESD coupling. IC Role / Device Role / Timing Role: Fast-response Zener shunt placed directly at connector interface to absorb 100 µs surges up to 40 W. Use Value: 40 W non-repetitive peak power rating handles ISO 7637-2 pulse 1/2a without degradation. |
Use Scenario: Stabilizing 12 V camera power input subjected to load-dump transients in rear-view systems. IC Role / Device Role / Timing Role: Primary clamping element in front-end protection network before DC-DC converter input. Use Value: Hard-knee breakdown ensures immediate conduction at 4.7 V, limiting downstream voltage overshoot to <5.2 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V7,115 | ±5 % tolerance, higher rdif (≈1000 Ω), no AEC-Q101 qualification | Suitable for consumer-grade power rails only; not rated for automotive temperature or reliability stress | Select when cost sensitivity outweighs automotive qualification and tighter regulation needs |
| MMSZ4704T1G | ±5 % tolerance, 500 mW Ptot, TO-236AB package (larger footprint), no AEC-Q101 | Higher power handling but incompatible with SOT23-reflow profiles and space-constrained automotive PCBs | Choose only if >250 mW continuous dissipation is required and board area permits larger package |
Compared with BZX84-C4V7,115 and MMSZ4704T1G, PZU84-B4V7-QR delivers superior regulation accuracy, automotive-grade reliability, and SOT23-compatible thermal performance - making it the sole option for AEC-compliant 4.7 V reference in compact, thermally constrained modules.
Availability
PZU84-B4V7-QR is available at Aetrix Electronics and suitable for engine control units, automotive cabin sensors, and ADAS camera modules requiring stable component supply with guaranteed AEC-Q101 compliance and SOT23 footprint compatibility.
Supply support for PZU84-B4V7-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, reliable discrete and logic devices for automotive, industrial, and computing markets.
PZU84-Q series belongs to Nexperia's automotive-qualified Zener regulator portfolio, engineered specifically for precision voltage reference and transient clamping in harsh-environment electronic control units.
FAQ
What is the maximum continuous reverse current for stable Zener operation?
The PZU84-B4V7-QR is rated for continuous Zener current up to 53 mA at 25 °C ambient, derived from its 250 mW power limit and 4.7 V nominal voltage (IZmax = Ptot/VZ ≈ 53 mA). Operation above this requires derating per thermal resistance curves in the datasheet, especially above 70 °C board temperature.
How does the "B" suffix differ from "C" in the PZU84-Q series?
The "B" suffix (e.g., PZU84-B4V7-QR) denotes ±2 % tolerance and optimized low-current regulation with hard breakdown knee, while "C" indicates approximately ±5 % tolerance and intentional minor leakage increase for faster switching and noise reduction - confirmed in AN90031 and Table 8 of the datasheet.
Can this Zener diode be used in forward-bias mode as a standard diode?
Yes - its forward voltage is specified ≤0.9 V at 10 mA, making it usable as a low-VF clamp or level-shifter in bidirectional protection schemes. However, its primary design intent and characterization are for reverse-bias Zener regulation, and forward conduction is not AEC-Q101 stress-tested beyond absolute maximum ratings.
Is the n.c. pin electrically isolated or internally tied to substrate?
Pin 2 is explicitly marked "not connected" in the official pinning diagram and simplified outline. It is fully electrically isolated - no internal bond wire or die connection exists. PCB layout must leave this pad unconnected and avoid solder mask openings that could cause bridging during reflow.
PZU84-B4V7-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):
- 4.65 V
- Tolerance:
- ±2.15%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 2 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-B4V7-QR FAQ
1.How can I place an order for PZU84-B4V7-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-B4V7-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-B4V7-QR reliable?
The price and inventory of PZU84-B4V7-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-B4V7-QR is usually 5 days.
3.What payment methods are accepted for PZU84-B4V7-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B4V7-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-B4V7-QR?
PZU84-B4V7-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-B4V7-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-B4V7-QR?
For technical support, including PZU84-B4V7-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B4V7-QR requirements.
6.How does Aetrix verify that PZU84-B4V7-QR is sourced from the original manufacturer or authorized distributors?
All PZU84-B4V7-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-B4V7-QR meets industry standards.
7.What is the process for return or replacement of PZU84-B4V7-QR?
All PZU84-B4V7-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B4V7-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-B4V7-QR part is unused and in its original packaging.
Return procedure for PZU84-B4V7-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-B4V7-QR Tags
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