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Nexperia USA Inc. PZU84-B3V9R
- Part No.:
- PZU84-B3V9R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-B3V9R.pdf
- Description:
- DIODE ZENER 3.9V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,894
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Product details
Overview
PZU84-B3V9R from Nexperia is a general-purpose Zener voltage regulator diode in SOT23 package, providing precise 3.9 V nominal regulation at 5 mA with ±2 % tolerance, 90 Ω typical differential resistance, and 3 μA max reverse leakage at 1 V. It operates across −55 °C to +150 °C ambient, delivering stable reference voltage for low-power analog circuits and power rail clamping in consumer and industrial electronics.
For engineers reviewing the PZU84-B3V9R datasheet, PZU84-B3V9R pinout, PZU84-B3V9R application, or PZU84-B3V9R equivalent, key selection criteria include its tight 3.9 V Zener voltage tolerance, low 90 Ω dynamic impedance at 5 mA, hard breakdown knee, and compatibility with standard SOT23 reflow footprints per IPC-7351.
Technical Context
This Zener diode belongs to the PZU84-B subseries optimized for very low dynamic impedance and minimal leakage current, enabling sharp voltage regulation in precision biasing and reference applications. Its breakdown knee is engineered for hard transition behavior, reducing voltage hysteresis during turn-on.
Thermal performance is characterized by 330 K/W junction-to-solder-point thermal resistance and 500 K/W junction-to-ambient resistance on FR4 PCB, supporting reliable operation up to 150 °C junction temperature under 250 mW steady-state dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.70 V to 4.10 V at IZ = 5 mA - defines regulated output voltage window with ±2 % tolerance |
| Differential Resistance (rdif) | 90 Ω max at IZ = 5 mA - ensures minimal output voltage shift under load current variation |
| Reverse Leakage Current (IR) | 3 μA max at VR = 1 V - enables low quiescent power consumption in standby circuits |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - supports use as polarity-sensitive clamp or protection element |
| Total Power Dissipation (Ptot) | 250 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 layout |
| Junction Temperature (Tj) | −55 °C to +150 °C - guarantees operation in extended industrial and automotive-adjacent environments |
| Package | SOT23 - surface-mount 3-terminal plastic package with 1.9 mm pitch, compatible with automated assembly |
Pinout & Package
SOT23 package: 2.9 mm × 1.3 mm × 1.0 mm body, single-sided 70 μm copper FR4 mounting, tin-plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Positive terminal for forward conduction; connected to lower-potential side in Zener regulation mode |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask required |
| 3 | Cathode (K) | Negative terminal; connected to higher-potential side in Zener mode-serves as voltage reference output node |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Enables predictable, low-hysteresis turn-on critical for precision voltage references and comparator thresholds |
| Very low leakage current | ≤3 μA at 1 V reverse bias minimizes parasitic loading in high-impedance sensor bias networks |
| Low differential impedance | 90 Ω typical at 5 mA maintains regulation stability under small-signal load transients |
| ±2 % voltage tolerance | Reduces need for post-production trimming in factory-calibrated analog signal chains |
| SOT23 footprint compatibility | Aligns with IPC-7351 standard land pattern (0.6 mm pad width, 0.7 mm length) for seamless placement |
Applications
| Power Rail Clamping | Reference Voltage Generation |
|---|---|
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage during ESD events or hot-plug insertion. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp voltage at 3.9 V, limiting stress on downstream CMOS inputs. Use Value: Prevents latch-up and gate oxide damage without requiring active circuitry or response delay. |
Use Scenario: Providing stable 3.9 V reference for ADC biasing in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Passive voltage reference source with low temperature coefficient (−3.5 mV/K) and minimal self-heating error. Use Value: Enables <1 LSB measurement error drift over −40 °C to +85 °C ambient without calibration. |
| Low-Power Bias Network | Signal Level Translation |
Use Scenario: Establishing fixed bias point for JFET amplifiers in audio preamplifier stages. IC Role / Device Role / Timing Role: Zener diode supplying stable gate-source voltage in depletion-mode configuration. Use Value: Maintains consistent transconductance and gain flatness across supply voltage variations. |
Use Scenario: Shifting logic-level signals between 5 V and 3.3 V domains in mixed-voltage MCU interfaces. IC Role / Device Role / Timing Role: Cathode-connected Zener used as bidirectional level translator with series resistor. Use Value: Achieves clean edge integrity and noise immunity without propagation delay or power supply dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V9 | ±5 % tolerance, 100 Ω max rdif at 5 mA, 5 μA max IR at 1 V | Higher voltage uncertainty and leakage reduce suitability for precision reference use | Select when cost sensitivity outweighs regulation accuracy requirements |
| MMSZ4685 | ±5 % tolerance, 110 Ω max rdif, 3 μA max IR, same SOT23 package | Looser voltage spec but identical leakage and thermal specs-acceptable for non-critical clamping | Choose for legacy design continuity where BOM rationalization is prioritized |
Compared with PZU84-B3V9R, BZX84-C3V9 trades tighter voltage control for broader availability and lower unit cost, while MMSZ4685 matches leakage performance but lacks the hard-knee breakdown needed for repeatable threshold triggering.
Availability
PZU84-B3V9R is available at Aetrix Electronics and suitable for power rail clamping, reference voltage generation, low-power bias networks, and signal level translation requiring stable component supply across industrial, consumer, and embedded design cycles.
Supply support for PZU84-B3V9R 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 discrete and logic devices, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The PZU84 series targets general-purpose voltage regulation and protection in space-constrained SMT designs, emphasizing tight tolerance, low leakage, and robust thermal performance in standard packages.
FAQ
What is the maximum continuous reverse current the PZU84-B3V9R can sustain in regulation mode?
The device is rated for 200 mA maximum forward current, but in Zener regulation, sustained reverse current is limited by power dissipation. At 25 °C ambient on standard FR4, 250 mW rating allows ~64 mA continuous reverse current (250 mW ÷ 3.9 V), derating linearly above 25 °C per 500 K/W thermal resistance.
Does the n.c. pin (pin 2) require PCB routing or thermal relief?
No-pin 2 is internally not connected and must remain electrically isolated. No trace, solder mask opening, or thermal relief is required. The SOT23 footprint shown in Figure 10 specifies no pad for pin 2, confirming its exclusion from the land pattern.
How does the temperature coefficient of −3.5 mV/K affect regulation accuracy over temperature?
At 3.9 V nominal, −3.5 mV/K yields ~−0.09 %/°C drift. Over a −40 °C to +85 °C range (125 K ΔT), total drift is ~−438 mV, or −11.2 %. This is fully specified in Table 8 and compensated in precision designs using complementary components or calibration.
Can PZU84-B3V9R be used in avalanche mode for transient suppression?
No-it is not rated or characterized for repetitive surge handling. While it withstands 40 W non-repetitive peak reverse power (100 μs pulse), its 250 mW steady-state limit and lack of defined clamping waveform make dedicated TVS diodes like PESD5V0S1BA preferable for ESD or surge protection.
PZU84-B3V9R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PZU84
- 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:
- ±2%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PZU84-B3V9R FAQ
1.How can I place an order for PZU84-B3V9R through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-B3V9R 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-B3V9R reliable?
The price and inventory of PZU84-B3V9R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-B3V9R is usually 5 days.
3.What payment methods are accepted for PZU84-B3V9R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B3V9R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-B3V9R?
PZU84-B3V9R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-B3V9R 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-B3V9R?
For technical support, including PZU84-B3V9R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B3V9R requirements.
6.How does Aetrix verify that PZU84-B3V9R is sourced from the original manufacturer or authorized distributors?
All PZU84-B3V9R 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-B3V9R meets industry standards.
7.What is the process for return or replacement of PZU84-B3V9R?
All PZU84-B3V9R units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B3V9R, 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-B3V9R part is unused and in its original packaging.
Return procedure for PZU84-B3V9R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-B3V9R Tags
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