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Nexperia USA Inc. PDZ3.3BZ
- Part No.:
- PDZ3.3BZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ3.3BZ.pdf
- Description:
- DIODE ZENER 3.3V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:29,021
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Product details
Overview
PDZ3.3BZ from Nexperia is a single silicon Zener diode designed for low-power voltage regulation in surface-mounted applications. It delivers a nominal Zener voltage of 3.32 V to 3.53 V at 5 mA, with ±2 % tolerance, 95 Ω maximum differential resistance at 5 mA, and 5 µA maximum reverse leakage current at 2.4 V. It is housed in an SOD323 (SC-76) package and rated for 400 mW total power dissipation at 25 °C ambient on FR4 PCB.
For engineers reviewing the PDZ3.3BZ datasheet, PDZ3.3BZ pinout, PDZ3.3BZ application, or PDZ3.3BZ equivalent, this device is selected for precision low-voltage reference clamping, ESD-protected I/O rail stabilization, and compact biasing in space-constrained consumer and industrial PCBs where thermal resistance to solder point is critical (Rth(j-sp) = 130 K/W).
Technical Context
This Zener operates in reverse breakdown mode with a hard knee and low dynamic impedance-critical for stable regulation under varying load currents. Its temperature coefficient is −2.4 mV/K at 5 mA, enabling predictable drift compensation in analog sensing circuits.
The device supports continuous forward current up to 200 mA and non-repetitive peak reverse current up to 8.0 A (100 µs pulse), making it suitable for transient suppression in conjunction with series resistors. Junction-to-solder-point thermal resistance (130 K/W) ensures reliable operation when mounted on standard FR4 with tin-plated copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.32 V to 3.53 V at IZ = 5 mA - defines precise clamping threshold for 3.3 V rail protection |
| Differential Resistance (rdif) | ≤ 95 Ω at IZ = 5 mA - ensures minimal output voltage shift under load variation |
| Reverse Leakage (IR) | ≤ 5 µA at VR = 2.4 V - guarantees low standby power loss in always-on circuits |
| Power Dissipation (Ptot) | 400 mW at Tamb = 25 °C on FR4 - sets maximum continuous DC power handling with standard layout |
| Thermal Resistance (Rth(j-sp)) | 130 K/W - enables accurate junction temperature estimation from solder point measurement |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - defines conduction loss during forward-biased ESD clamp events |
| Package | SOD323 (SC-76) - 1.35 mm × 0.85 mm footprint optimized for high-density automated assembly |
Pinout & Package
The PDZ3.3BZ is housed in a 2-pin SOD323 (SC-76) surface-mount plastic package. The cathode is marked by a bar on the device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; reverse-biased during Zener operation; marking bar identifies this terminal |
| 2 (A) | Anode | Connected to ground or lower-potential reference; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 95 Ω max at 5 mA - maintains tight voltage regulation across load transients |
| Hard breakdown knee | Sharp, well-defined reverse conduction onset - eliminates ambiguity in clamping threshold |
| Small outline package | SOD323 footprint (1.35 × 0.85 mm) - saves board area in portable and wearables designs |
| Low leakage current | 5 µA max at 2.4 V - minimizes quiescent current in battery-powered sensor nodes |
| Stable temperature coefficient | −2.4 mV/K at 5 mA - allows predictable drift modeling in temperature-sensitive references |
Applications
| USB Interface Protection | Microcontroller I/O Clamping |
|---|---|
|
Use Scenario: Protecting 3.3 V USB data lines (D+/D−) against ESD and overvoltage surges. IC Role / Device Role / Timing Role: Zener clamping element placed between signal line and ground, activated only during overvoltage events. Use Value: Limits transient voltage to ≤3.53 V, preventing damage to USB PHY inputs while adding <1 pF capacitance (Cd = 410 pF at 0 V, f = 1 MHz). |
Use Scenario: Stabilizing GPIO voltage levels on ARM Cortex-M microcontrollers operating at 3.3 V. IC Role / Device Role / Timing Role: Low-current shunt regulator providing clean 3.3 V reference for ADC reference input or analog comparator threshold. Use Value: Delivers 3.32–3.53 V with ≤95 Ω impedance, ensuring <10 mV error under 0.5 mA load variation in sensor interface circuits. |
| Low-Power Sensor Biasing | Industrial Signal Conditioning |
|
Use Scenario: Providing stable bias voltage for analog front-end op-amps in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Shunt regulator sourcing bias current to amplifier input stage while rejecting supply ripple. Use Value: Draws only 5 µA leakage at 2.4 V, extending battery life in multi-year deployments without compromising 3.3 V accuracy. |
Use Scenario: Regulating auxiliary 3.3 V supply for isolated CAN transceiver logic rails in factory automation PLC modules. IC Role / Device Role / Timing Role: Secondary voltage clamp protecting logic-level integrity during bus fault conditions. Use Value: Withstands 8.0 A non-repetitive surge (100 µs), surviving short-duration transients induced by relay switching or motor drive noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V3 | Same SOD323 package; VZ = 3.3 V (±2 %); rdif = 90 Ω max; Rth(j-a) = 350 K/W | Higher thermal resistance reduces power handling in enclosed enclosures | Preferred where tighter VZ distribution (3.3 V nominal vs. 3.32–3.53 V range) is required |
| MMSZ3V3T1G | SOD123 package (larger); VZ = 3.3 V (±5 %); rdif = 120 Ω max; Ptot = 500 mW | Larger footprint limits routing density; wider tolerance increases calibration overhead | Chosen when higher power margin (500 mW) outweighs board space constraints |
Compared with BZX384-B3V3 and MMSZ3V3T1G, PDZ3.3BZ offers the lowest differential resistance (95 Ω) and best thermal coupling to solder point (130 K/W), making it optimal for high-accuracy, thermally sensitive regulation in miniaturized layouts.
Availability
PDZ3.3BZ is available at Aetrix Electronics and suitable for USB interface protection, microcontroller I/O clamping, and low-power sensor biasing requiring stable component supply and consistent parametric performance across production batches.
Supply support for PDZ3.3BZ 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, reliability, and miniaturization.
PDZ3.3BZ belongs to the PDZ-B series of low-power Zener diodes engineered for precision voltage regulation and transient clamping in space-constrained, cost-sensitive consumer and industrial electronics.
FAQ
What is the maximum continuous reverse current the PDZ3.3BZ can sustain at 25 °C?
The PDZ3.3BZ does not specify a maximum continuous reverse current rating. Its operation is defined by power dissipation: at 25 °C ambient on FR4, it sustains up to 400 mW, corresponding to ~121 mA at 3.32 V. Derating applies above 25 °C per the published power derating curve (Fig. 1).
Can PDZ3.3BZ be used in place of a 3.3 V LDO for powering ICs?
No. PDZ3.3BZ is a shunt regulator, not a series regulator. It requires a series current-limiting resistor and cannot source load current directly. It is intended for voltage reference, clamping, or low-current biasing-not for powering active loads exceeding a few milliamps.
How does the −2.4 mV/K temperature coefficient affect circuit accuracy over −40 °C to +85 °C?
Over that range, the Zener voltage shifts by approximately −2.4 mV/K × 125 K = −300 mV worst-case. At nominal 3.32 V, this yields a span of ~3.02 V to 3.32 V. For stable references, use it with temperature-compensated designs or within narrow ambient ranges.
Is the SOD323 package compatible with standard reflow profiles for lead-free soldering?
Yes. Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The recommended footprint (Fig. 9) uses 0.6 mm solder lands and 0.5 mm solder paste openings per pad, supporting peak temperatures up to 260 °C for ≤30 seconds without degradation.
PDZ3.3BZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PDZ-B
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 1000 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PDZ3.3BZ FAQ
1.How can I place an order for PDZ3.3BZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ3.3BZ 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 PDZ3.3BZ reliable?
The price and inventory of PDZ3.3BZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ3.3BZ is usually 5 days.
3.What payment methods are accepted for PDZ3.3BZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ3.3BZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ3.3BZ?
PDZ3.3BZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ3.3BZ 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 PDZ3.3BZ?
For technical support, including PDZ3.3BZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ3.3BZ requirements.
6.How does Aetrix verify that PDZ3.3BZ is sourced from the original manufacturer or authorized distributors?
All PDZ3.3BZ 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 PDZ3.3BZ meets industry standards.
7.What is the process for return or replacement of PDZ3.3BZ?
All PDZ3.3BZ units undergo pre-shipment inspection (PSI). If there is an issue with PDZ3.3BZ, 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 PDZ3.3BZ part is unused and in its original packaging.
Return procedure for PDZ3.3BZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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