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Nexperia USA Inc. PDZ30B-QZ
- Part No.:
- PDZ30B-QZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ30B-QZ.pdf
- Description:
- DIODE ZENER 30V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,689
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Product details
Overview
PDZ30B-QZ from Nexperia is a single Zener diode designed for precision voltage regulation in low-power automotive and industrial circuits, with a nominal Zener voltage of 30 V (29.19 V to 30.69 V at IZ = 5 mA), total power dissipation up to 400 mW, dynamic impedance ≤200 Ω at IZ = 0.5 mA, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the PDZ30B-QZ datasheet, PDZ30B-QZ pinout, PDZ30B-QZ application, or PDZ30B-QZ equivalent, this device is selected for stable reference generation in power supply feedback loops, overvoltage clamping in sensor interfaces, and ESD-robust voltage rail protection where tight tolerance (±2 %), low leakage (<0.05 µA at VR = 23 V), and thermal stability are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a hard knee characteristic, enabling sharp regulation onset at its specified working current. Its temperature coefficient of +26.6 mV/K at IZ = 5 mA indicates positive drift-critical for compensating negative-drift components in bias networks.
Thermal resistance from junction to solder point is 130 K/W, and to ambient is 340 K/W on FR4 PCB, defining derating behavior above 25 °C. The SOD323 package supports reflow and wave soldering per defined footprints, with cathode marked by a bar on the body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 29.19 V to 30.69 V at IZ = 5 mA - defines precise clamping threshold in feedback or protection circuits |
| Dynamic Impedance rdif | ≤200 Ω at IZ = 0.5 mA - ensures minimal voltage shift under varying load currents |
| Reverse Leakage IR | <0.05 µA at VR = 23 V - prevents parasitic current draw in high-impedance bias networks |
| Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C - sets maximum continuous energy handling on standard FR4 PCB |
| Temperature Coefficient SZ | +26.6 mV/K at IZ = 5 mA - enables predictable thermal compensation in reference designs |
| Junction-to-Ambient Rth(j-a) | 340 K/W - determines required board copper area and airflow for thermal management |
| Non-repetitive Peak IZSM | 1.0 A for tp = 100 µs - supports transient surge suppression without failure |
Pinout & Package
PDZ30B-QZ is housed in a SOD323 (SC-76) surface-mount plastic package measuring 1.8 mm × 1.35 mm × 0.95 mm, with gull-wing leads optimized for automated placement and reflow soldering. Cathode polarity is indicated by a marking bar on the component body.
| 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 rail; completes bias path for controlled conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| Hard breakdown knee | Enables clean transition into regulation without soft turn-on ambiguity in precision references |
| Low leakage at low VR | <0.05 µA at 23 V allows integration into nanoampere-level sensor bias chains |
| Small SOD323 footprint | 1.8 mm × 1.35 mm saves board space in compact power management modules |
| Tolerance ≈ ±2 % | Reduces need for post-production trimming in factory-set voltage rails |
Applications
| Automotive Sensor Biasing | Industrial Power Supply Feedback |
|---|---|
|
Use Scenario: Providing stable reference voltage for analog front-end circuitry in engine control unit (ECU) temperature and pressure sensors. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, maintaining constant bias across sensor Wheatstone bridges despite battery voltage fluctuations. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure long-term accuracy and reliability across −40 °C to +150 °C ambient conditions. |
Use Scenario: Regulating output voltage in isolated flyback converters used in programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: Shunt regulator in optocoupler feedback loop, setting precise secondary-side voltage threshold for error amplifier comparison. Use Value: 200 Ω dynamic impedance minimizes output voltage deviation during load transients, improving regulation accuracy to ±1.5 %. |
| ESD-Protected IO Clamping | Microcontroller Reset Circuit |
|
Use Scenario: Protecting RS-485 transceiver inputs against ±8 kV contact ESD events in factory automation fieldbus nodes. IC Role / Device Role / Timing Role: Low-capacitance (66 pF) Zener placed between data line and ground, clamping surges before they reach IC pins. Use Value: 1.0 A non-repetitive peak current rating absorbs IEC 61000-4-2 pulses without degradation, preserving signal integrity. |
Use Scenario: Generating a clean, temperature-stable reset threshold for ARM Cortex-M microcontrollers in medical diagnostic equipment. IC Role / Device Role / Timing Role: Zener-based voltage detector feeding comparator input to assert reset when VDD drops below 2.7 V. Use Value: +26.6 mV/K temperature coefficient offsets negative TC of comparator reference, yielding near-zero net drift over operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C30LT1G | Same 30 V nominal VZ, but ±5 % tolerance and no AEC-Q101 qualification; higher leakage (≤100 nA at 24 V) | Suitable for commercial-grade consumer power supplies, not automotive environments | Select when cost sensitivity outweighs automotive compliance and tighter tolerance requirements |
| MMSZ5257ET1G | 30 V nominal VZ, ±5 % tolerance, 500 mW Ptot, SOD-123 package (larger footprint), no AEC-Q101 | Higher power handling supports higher-current clamp applications but lacks automotive validation | Choose when board layout allows larger SOD-123 and thermal margin exceeds 400 mW requirement |
Compared with BZX84-C30LT1G and MMSZ5257ET1G, PDZ30B-QZ delivers superior automotive reliability, tighter voltage tolerance, and lower leakage-making it the preferred choice for safety-critical or thermally constrained designs where regulatory compliance and precision are non-negotiable.
Availability
PDZ30B-QZ is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC power supplies, ESD-protected communication interfaces, and microcontroller reset circuits requiring stable component supply with full traceability and lifecycle support.
Supply support for PDZ30B-QZ 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 consumer markets.
PDZ30B-QZ belongs to the PDZ-B-Q series of AEC-Q101-qualified Zener diodes engineered specifically for robust voltage regulation in harsh automotive environments and high-reliability industrial systems.
FAQ
What is the maximum continuous reverse current the PDZ30B-QZ can sustain at 25 °C?
The PDZ30B-QZ does not specify a maximum continuous reverse current; instead, its operation is governed by power dissipation limits. At 25 °C ambient, it sustains up to 400 mW total power, corresponding to ~13.3 mA at 30 V. Exceeding this causes thermal runaway due to its positive temperature coefficient.
How does the +26.6 mV/K temperature coefficient affect circuit design?
This positive coefficient means VZ increases by 26.6 mV per Kelvin rise in junction temperature. In bias networks, it can offset negative TC components (e.g., op-amp inputs or resistors), enabling near-zero net drift-but requires thermal coupling awareness to avoid unintended gain shifts in precision references.
Is PDZ30B-QZ compatible with lead-free reflow soldering profiles?
Yes-Nexperia specifies compatibility with standard JEDEC J-STD-020 lead-free reflow profiles. The SOD323 package withstands peak temperatures up to 260 °C for 30 seconds, and the recommended solder land pattern (Fig. 9) ensures reliable joint formation without tombstoning or voiding.
Can PDZ30B-QZ be used in series or parallel configurations for higher voltage or current handling?
Series connection is viable for higher clamping voltages (e.g., two 30 V devices yield ~60 V), but mismatched temperature coefficients cause uneven voltage sharing. Parallel use is strongly discouraged-minor VZ variations lead to current hogging and thermal instability, risking premature failure.
PDZ30B-QZ 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):
- 30 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23 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
PDZ30B-QZ FAQ
1.How can I place an order for PDZ30B-QZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ30B-QZ 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 PDZ30B-QZ reliable?
The price and inventory of PDZ30B-QZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ30B-QZ is usually 5 days.
3.What payment methods are accepted for PDZ30B-QZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ30B-QZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ30B-QZ?
PDZ30B-QZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ30B-QZ 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 PDZ30B-QZ?
For technical support, including PDZ30B-QZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ30B-QZ requirements.
6.How does Aetrix verify that PDZ30B-QZ is sourced from the original manufacturer or authorized distributors?
All PDZ30B-QZ 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 PDZ30B-QZ meets industry standards.
7.What is the process for return or replacement of PDZ30B-QZ?
All PDZ30B-QZ units undergo pre-shipment inspection (PSI). If there is an issue with PDZ30B-QZ, 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 PDZ30B-QZ part is unused and in its original packaging.
Return procedure for PDZ30B-QZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ30B-QZ Tags
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