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Nexperia USA Inc. PDZ3.3B-QX
- Part No.:
- PDZ3.3B-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ3.3B-QX.pdf
- Description:
- DIODE ZENER 3.3V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,388
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Product details
Overview
PDZ3.3B-QX from Nexperia is a single Zener diode designed for precision low-voltage regulation in space-constrained SMD applications, with a nominal Zener voltage of 3.32 V to 3.53 V at 5 mA, ±2 % tolerance, 95 Ω maximum differential resistance, and 5 µA reverse current at 1 V. It operates up to +150 °C junction temperature and is AEC-Q101 qualified for automotive power rail stabilization.
For engineers reviewing the PDZ3.3B-QX datasheet, PDZ3.3B-QX pinout, PDZ3.3B-QX application, or PDZ3.3B-QX equivalent, this device is selected for low-current reference generation, overvoltage clamping in sensor interfaces, and ESD-protected bias networks where tight voltage accuracy and thermal stability below 3.6 V are required.
Technical Context
This Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable reverse-biased conduction above its specified breakdown threshold. Its hard breakdown knee and low leakage (5 µA at VR = 1 V) support clean voltage clamping without significant current drift under light-load conditions.
Thermal performance is defined by Rth(j-a) = 340 K/W on FR4 PCB and Rth(j-sp) = 130 K/W to solder point, enabling reliable operation at up to 400 mW total power dissipation at Tamb ≤ 25 °C with linear derating above that ambient. The −2.4 mV/K temperature coefficient at IZ = 5 mA indicates predictable negative drift across temperature.
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 voltage shift under load variation |
| Reverse Current (IR) | 5 µA max at VR = 1 V - enables low-power standby biasing without excessive leakage |
| Power Dissipation (Ptot) | 400 mW at Tamb ≤ 25 °C - supports continuous regulation in compact SOD323 footprint |
| Temperature Coefficient (SZ) | −2.4 mV/K at IZ = 5 mA - quantifies predictable negative VZ drift with rising temperature |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - confirms low-loss forward conduction for bidirectional protection schemes |
| Junction Temperature (Tj) | +150 °C max - permits operation in under-hood automotive environments |
Pinout & Package
PDZ3.3B-QX uses the SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.35 mm body, 0.45 mm nominal height, cathode marked by a bar on the top surface. Mounting requires reflow-compatible footprint per Figure 9 (0.6 mm pad width, 0.95–2.2 mm pad length).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (A) | Anode | Connected to ground or lower-potential reference; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Hard breakdown knee | Sharp, well-defined Zener transition minimizes ambiguity in clamping onset |
| Low dynamic impedance | 95 Ω max at 5 mA enables stable regulation even with varying source impedance |
| Small SOD323 footprint | 1.7 mm × 1.35 mm area saves board space in dense sensor or MCU peripheral layouts |
| ±2 % voltage tolerance | Ensures consistent clamping across production lots without post-assembly trimming |
Applications
| Automotive Sensor Biasing | USB-C Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 3.3 V reference to analog front-end of engine coolant temperature sensor in passenger vehicle ECUs. IC Role / Device Role / Timing Role: Shunt Zener regulator establishing fixed bias voltage for sensor Wheatstone bridge excitation. Use Value: Maintains <±10 mV drift over −40 °C to +125 °C ambient due to −2.4 mV/K coefficient and AEC-Q101 thermal robustness. |
Use Scenario: Clamping VBUS line transients during hot-plug events in automotive infotainment USB-C receptacles. IC Role / Device Role / Timing Role: Low-capacitance (410 pF) shunt clamp limiting voltage spikes to ≤3.6 V before they reach USB-PD controller. Use Value: 5 µA leakage at 1 V prevents standby current drain; 8 A non-repetitive surge rating absorbs ESD and load-dump energy. |
| Industrial PLC I/O Protection | Medical Wearable Battery Monitor Reference |
|
Use Scenario: Protecting 3.3 V ADC input of programmable logic controller analog input module against field-wiring induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at connector entry point, upstream of TVS and series resistor. Use Value: 95 Ω rdif ensures clamped voltage stays within ADC's absolute maximum rating even under 10 mA fault current. |
Use Scenario: Generating accurate 3.3 V reference for fuel gauge IC in rechargeable lithium-polymer wearable health monitors. IC Role / Device Role / Timing Role: Precision voltage reference source for coulomb counter calibration during battery charging cycles. Use Value: ±2 % initial tolerance and −2.4 mV/K TC enable <±25 mV total error across 0–45 °C operating range without software compensation. |
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 3.3 V nominal, ±2 % tolerance, but SOD-323 package with higher rdif (120 Ω) and no AEC-Q101 qualification | Limited to commercial-grade consumer electronics; not validated for automotive thermal cycling or humidity exposure | Select when cost sensitivity outweighs automotive qualification requirements |
| MMSZ4684T1G | 3.3 V nominal, ±5 % tolerance, 100 Ω rdif, SOD-123 package (larger footprint), AEC-Q101 qualified | Accepts wider voltage variation; requires 2.5× more PCB area; suitable where layout density is less constrained | Select when board space allows larger package and ±5 % regulation tolerance is acceptable |
Compared with BZX384-B3V3 and MMSZ4684T1G, PDZ3.3B-QX uniquely combines AEC-Q101 qualification, tight ±2 % tolerance, low 95 Ω impedance, and minimal SOD323 footprint-making it optimal for high-density automotive and industrial 3.3 V rail stabilization where precision and reliability are co-constrained.
Availability
PDZ3.3B-QX is available at Aetrix Electronics and suitable for automotive sensor modules, USB-C interface protection circuits, and industrial PLC I/O conditioning requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for PDZ3.3B-QX 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 leading Dutch semiconductor manufacturer specializing in high-volume, high-reliability discrete and logic devices, with core expertise in automotive-qualified components and advanced packaging.
PDZ3.3B-QX belongs to the PDZ-B-Q series of AEC-Q101-qualified Zener diodes engineered specifically for precision voltage regulation in harsh-environment automotive and industrial control systems.
FAQ
What is the maximum continuous reverse current the PDZ3.3B-QX can sustain at 3.3 V regulation?
The PDZ3.3B-QX does not regulate continuously at exactly 3.3 V; its Zener voltage is specified between 3.32 V and 3.53 V at 5 mA test current. At that condition, it sustains 5 mA reliably. For continuous operation, current must remain within Ptot limits: at 3.53 V, maximum safe DC current is ~113 mA (400 mW ÷ 3.53 V), but thermal derating applies above 25 °C ambient.
How does the −2.4 mV/K temperature coefficient affect regulation accuracy over temperature?
At IZ = 5 mA, the Zener voltage decreases by 2.4 mV per Kelvin rise. From 25 °C to 125 °C (ΔT = 100 K), VZ drops by ~240 mV - from 3.425 V (midpoint) to ~3.185 V. This predictable drift enables hardware or firmware compensation in precision reference designs.
Can PDZ3.3B-QX be used in series with another Zener for higher voltage clamping?
No - PDZ3.3B-QX is a single-junction Zener diode with only two terminals. Series connection would require discrete anode-to-cathode wiring and introduce mismatched temperature coefficients and impedance, degrading accuracy. For higher voltages, select a single-device part like PDZ5.1B-Q or PDZ6.2B-Q from the same series.
Is the SOD323 package compatible with standard reflow profiles for lead-free assembly?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The SOD323 package withstands peak temperatures up to 260 °C for ≤30 seconds. Recommended solder land dimensions (0.6 mm × 2.2 mm per pad) and stencil aperture design are provided in Figure 9 of the datasheet.
PDZ3.3B-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PDZ-B-Q
- 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):
- 95 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PDZ3.3B-QX FAQ
1.How can I place an order for PDZ3.3B-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ3.3B-QX 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 PDZ3.3B-QX reliable?
The price and inventory of PDZ3.3B-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ3.3B-QX is usually 5 days.
3.What payment methods are accepted for PDZ3.3B-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ3.3B-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ3.3B-QX?
PDZ3.3B-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ3.3B-QX 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 PDZ3.3B-QX?
For technical support, including PDZ3.3B-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ3.3B-QX requirements.
6.How does Aetrix verify that PDZ3.3B-QX is sourced from the original manufacturer or authorized distributors?
All PDZ3.3B-QX 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 PDZ3.3B-QX meets industry standards.
7.What is the process for return or replacement of PDZ3.3B-QX?
All PDZ3.3B-QX units undergo pre-shipment inspection (PSI). If there is an issue with PDZ3.3B-QX, 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 PDZ3.3B-QX part is unused and in its original packaging.
Return procedure for PDZ3.3B-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ3.3B-QX Tags
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