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Nexperia USA Inc. PZU84-B4V3-QR
- Part No.:
- PZU84-B4V3-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-B4V3-QR.pdf
- Description:
- DIODE ZENER 4.25V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,899
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Product details
Overview
PZU84-B4V3-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 4.3 V nominal breakdown voltage at 5 mA, with differential resistance ≤90 Ω and reverse leakage ≤3 μA at 1 V, used for precision voltage reference and overvoltage protection in automotive power rails.
For engineers reviewing the PZU84-B4V3-QR datasheet, PZU84-B4V3-QR pinout, PZU84-B4V3-QR application, or PZU84-B4V3-QR equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance at low bias current, thermal resistance (Rth(j-sp) = 330 K/W), AEC-Q101 qualification status, and SOT23 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable 4.3 V regulation across load and line variations, with hard breakdown knee enabling sharp turn-on and minimal overshoot during transient suppression. Its low 3 μA leakage at VR = 1 V supports low-power standby circuits without excessive quiescent drain.
The device features intentional low dynamic impedance (≤90 Ω at IZ = 5 mA) and temperature coefficient of −3.5 mV/K, optimized for stable reference generation in ambient ranges from −55 °C to +150 °C. It meets AEC-Q101 stress test requirements for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.01 V to 4.48 V at IZ = 5 mA - ensures tight 4.3 V regulation with ±2 % tolerance for accurate feedback in LDOs or ADC references |
| Differential Resistance rdif | ≤90 Ω at IZ = 5 mA - minimizes output voltage shift under varying load current, critical for stable sensing nodes |
| Reverse Leakage IR | ≤3 μA at VR = 1 V - enables use in ultra-low-power wake-up circuits without compromising battery life |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - allows integration into bidirectional clamping or polarity protection schemes |
| Power Dissipation Ptot | 250 mW on FR4 PCB - supports continuous regulation in compact automotive modules without forced cooling |
| Junction Temperature Tj | −55 °C to +150 °C - validated for engine control units, body controllers, and ADAS sensor interfaces |
| AEC-Q101 Qualified | Yes - certified for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOT23 plastic surface-mounted package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, tin-plated terminations, standard reflow footprint per Fig. 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-bias configuration; must be routed with low-impedance path to ground or return rail |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask opening required |
| 3 | Cathode (K) | Connected to regulated voltage node; serves as thermal conduction path (Rth(j-sp) = 330 K/W to solder point) |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables direct replacement in 4.3 V reference designs without recalibration or resistor trimming |
| Hard breakdown knee | Ensures predictable turn-on behavior below 100 ns, reducing voltage overshoot during ESD or load dump events |
| Low dynamic impedance (≤90 Ω) | Maintains regulation accuracy within ±15 mV across 1–10 mA load current variation |
| AEC-Q101 qualification | Validates reliability for 15-year automotive service life under thermal shock, humidity, and vibration stress |
| Non-repetitive peak power (40 W) | Withstands ISO 7637-2 Pulse 1/2a/5a transients without degradation when used with series current limiting |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Provides stable 4.3 V reference for analog front-end of knock sensor amplifier in gasoline ECU. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and stabilize reference rail against battery ripple and alternator noise. Use Value: Maintains ADC input accuracy within ±0.5 LSB over −40 °C to +125 °C ambient, enabled by −3.5 mV/K tempco and low rdif. |
Use Scenario: Regulates excitation voltage for 350 Ω strain gauge bridge in industrial pressure transmitter. IC Role / Device Role / Timing Role: Precision shunt regulator supplying constant current to bridge via series resistor. Use Value: Limits reference drift to <±1.2 mV over 10-year field life, supported by AEC-Q101 qualification and 3 μA max leakage at 1 V. |
| Automotive Body Control Module (BCM) Overvoltage Clamp | Consumer IoT Battery Protection Circuit |
Use Scenario: Clamps LIN bus transceiver supply rail during load dump events in BCM door module. IC Role / Device Role / Timing Role: Fast-acting shunt protector absorbing surge energy up to 40 W for 100 μs pulses. Use Value: Prevents transceiver latch-up by clamping voltage to ≤5.1 V during ISO 7637-2 Pulse 5a, leveraging hard knee and low rdif. |
Use Scenario: Guards microcontroller reset pin against overvoltage during USB-C hot-plug in smart thermostat. IC Role / Device Role / Timing Role: Low-leakage Zener referenced to system ground to hold reset line low until VCC stabilizes. Use Value: Ensures reliable reset assertion with <100 nA standby current contribution, enabled by ≤3 μA IR at 1 V. |
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 | ±5 % tolerance, higher rdif (≤100 Ω), no AEC-Q101 qualification | Acceptable for non-automotive consumer power supplies where cost > precision | Select only if ±5 % VZ tolerance and absence of automotive qualification are acceptable in target design |
| MMSZ4685 | ±5 % tolerance, 500 mW Ptot, SOD-123 package (larger footprint) | Suitable for higher-power industrial regulators requiring >250 mW dissipation | Choose when thermal margin exceeds 250 mW or board space permits larger SOD-123 layout |
Compared with BZX84-C4V3 and MMSZ4685, PZU84-B4V3-QR delivers tighter voltage control, lower dynamic impedance, and automotive-grade reliability in the smallest SOT23 footprint-making it optimal for space-constrained, safety-critical 4.3 V reference and clamp functions.
Availability
PZU84-B4V3-QR is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor signal conditioning, and consumer IoT battery protection circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for PZU84-B4V3-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 devices, with core R&D and manufacturing in Europe and Asia.
The PZU84-Q series belongs to Nexperia's automotive-qualified Zener regulator portfolio, engineered specifically for precision voltage reference and transient suppression in harsh-environment automotive electronics.
FAQ
What is the maximum allowable forward current for PZU84-B4V3-QR?
The absolute maximum forward current is 200 mA per Table 5 (Limiting Values). However, sustained operation above 10 mA is not recommended due to thermal limitations-typical forward voltage is ≤0.9 V at 10 mA, and exceeding this current risks junction overheating given the 500 K/W junction-to-ambient thermal resistance in free air.
Does PZU84-B4V3-QR support bidirectional ESD protection?
No-it is a unidirectional Zener diode configured for reverse-bias regulation only. The anode is not rated for reverse conduction, and the cathode-to-anode breakdown voltage exceeds 50 V. For bidirectional ESD protection, a dedicated TVS array such as PESD5V0S1BA must be used instead.
How does the "B" suffix in PZU84-B4V3-QR affect its electrical behavior?
The "B" denotes the ±2 % tolerance grade and places the device in the low-leakage subgroup (≤3 μA at 1 V), optimized for precision reference applications. In contrast, "C"-suffix variants have ≈±5 % tolerance and slightly higher leakage-intended for general-purpose regulation where cost sensitivity outweighs accuracy requirements.
Can PZU84-B4V3-QR be used in parallel for higher power handling?
No-Zener diodes exhibit negative temperature coefficients and mismatched breakdown voltages, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device like PZU15-B4V3-Q (500 mW) or implement active regulation with a transistor-based shunt circuit.
PZU84-B4V3-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:
- ±2.24%
- 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-B4V3-QR FAQ
1.How can I place an order for PZU84-B4V3-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-B4V3-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-B4V3-QR reliable?
The price and inventory of PZU84-B4V3-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-B4V3-QR is usually 5 days.
3.What payment methods are accepted for PZU84-B4V3-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B4V3-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-B4V3-QR?
PZU84-B4V3-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-B4V3-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-B4V3-QR?
For technical support, including PZU84-B4V3-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B4V3-QR requirements.
6.How does Aetrix verify that PZU84-B4V3-QR is sourced from the original manufacturer or authorized distributors?
All PZU84-B4V3-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-B4V3-QR meets industry standards.
7.What is the process for return or replacement of PZU84-B4V3-QR?
All PZU84-B4V3-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B4V3-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-B4V3-QR part is unused and in its original packaging.
Return procedure for PZU84-B4V3-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-B4V3-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
-
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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