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Nexperia USA Inc. PDZ12B-QF
- Part No.:
- PDZ12B-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ12B-QF.pdf
- Description:
- DIODE ZENER 12V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,069
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Product details
Overview
PDZ12B-QF from Nexperia is a single silicon Zener diode designed for low-power voltage regulation in automotive and industrial circuits, with a nominal Zener voltage of 12.0 V (min 11.74 V, max 12.24 V at IZ = 5 mA), ±2 % tolerance, 80 Ω maximum differential resistance at 5 mA, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the PDZ12B-QF datasheet, PDZ12B-QF pinout, PDZ12B-QF application, or PDZ12B-QF equivalent, this device serves as a precision shunt regulator in power supply feedback paths, overvoltage clamping circuits, and reference voltage generation where stable 12 V regulation at low current (<20 mA) and low leakage (<0.1 µA at VR = 9.0 V) are required.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable DC voltage across its terminals under varying load or input conditions. Its hard breakdown knee and low dynamic impedance ensure minimal voltage deviation during transient current changes.
Thermal design is constrained by Rth(j-a) = 340 K/W on FR4 PCB and Tj ≤ +150 °C, requiring derating above +25 °C ambient per Fig. 1. The cathode-marked SOD323 package enables compact placement in space-constrained automotive ECUs and sensor modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 11.74 V to 12.24 V at IZ = 5 mA - defines regulated output voltage range in shunt configuration |
| Differential Resistance rdif | ≤ 80 Ω at IZ = 5 mA - determines voltage stability against load current variation |
| Reverse Leakage IR | ≤ 0.1 µA at VR = 9.0 V - ensures minimal quiescent current in standby/clamp modes |
| Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C - sets maximum continuous power handling on standard FR4 PCB |
| Forward Voltage VF | 0.9 V at IF = 10 mA - relevant for polarity-check or series forward-bias use cases |
| Temperature Coefficient SZ | +8.4 mV/K at IZ = 5 mA - quantifies VZ drift with junction temperature rise |
| Non-repetitive Peak Current IZSM | 3.0 A at tp = 100 µs - supports transient surge suppression without failure |
Pinout & Package
PDZ12B-QF is housed in a SOD323 (SC-76) surface-mount plastic package measuring 1.8 mm × 1.35 mm × 0.95 mm, with cathode indicated by a marking bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Hard breakdown knee | Sharp, well-defined reverse conduction onset improves regulation accuracy at low currents |
| Low leakage current | ≤0.1 µA at 9.0 V enables energy-efficient clamping in battery-powered systems |
| Small SOD323 footprint | 0.95 mm height and 1.35 mm width support high-density PCB layouts in ADAS modules |
| ±2 % voltage tolerance | Tighter than standard Zeners, reducing need for post-production trimming in reference designs |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 12 V supply rail for microcontroller peripherals in door module electronics. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining stable 12 V reference for CAN transceiver biasing and EEPROM programming voltage. Use Value: Enables reliable operation across −40 °C to +125 °C ambient with <±15 mV total VZ shift due to tight tolerance and known SZ. |
Use Scenario: Clamping analog sensor output (e.g., pressure transducer) to prevent ADC overvoltage during ESD events. IC Role / Device Role / Timing Role: Fast-acting overvoltage protector placed directly at sensor amplifier output node. Use Value: Limits transient excursions to ≤12.24 V with 3.0 A non-repetitive surge capability, protecting downstream 12-bit SAR ADC inputs. |
| USB-C Power Delivery Feedback | Smart Meter Reference Voltage |
Use Scenario: Providing precise 12 V reference for optocoupler feedback in isolated 24 V to 12 V DC-DC converter. IC Role / Device Role / Timing Role: Zener-based voltage reference in secondary-side error amplifier loop. Use Value: Delivers <80 Ω dynamic impedance at 5 mA, minimizing feedback loop gain variation and improving load regulation to ±0.5 %. |
Use Scenario: Generating stable 12 V reference for metrology-grade voltage measurement circuitry in electricity meters. IC Role / Device Role / Timing Role: Precision shunt regulator supplying bias to instrumentation amplifier and voltage reference IC. Use Value: Achieves <0.1 µA leakage at 9 V, reducing reference current error contribution to <0.001 % of full-scale reading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12 | Same 12 V nominal, but ±5 % tolerance and no AEC-Q101 qualification; higher rdif (≥100 Ω) | Suitable for consumer-grade power supplies only; not rated for automotive temperature or reliability stress | Select when cost sensitivity outweighs automotive compliance and tighter regulation needs |
| MMSZ5242B | 12 V nominal, ±5 % tolerance, 500 mW Ptot, SOD-123 package (larger footprint) | Higher power handling but larger board area; lacks AEC-Q101 and exhibits softer knee | Choose when thermal margin >400 mW is required and PCB space allows SOD-123 layout |
Compared with BZX84-C12 and MMSZ5242B, PDZ12B-QF offers superior voltage accuracy, automotive qualification, and compact SOD323 packaging-making it optimal for space-constrained, safety-critical 12 V regulation where long-term stability and low leakage are essential.
Availability
PDZ12B-QF is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, USB-C power delivery feedback circuits, and smart meter reference subsystems requiring stable component supply with guaranteed AEC-Q101 compliance.
Supply support for PDZ12B-QF 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, with leadership in automotive-qualified components and advanced packaging technologies.
The PDZ-B-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation in harsh-environment automotive electronics and industrial control systems.
FAQ
What is the maximum continuous reverse current the PDZ12B-QF can sustain at 25 °C ambient?
The PDZ12B-QF has no specified maximum continuous reverse current rating; instead, its safe operating limit is defined by power dissipation. At 25 °C ambient on FR4 PCB, it sustains up to 400 mW, corresponding to ~33.3 mA at 12 V (P = V × I). Exceeding this requires thermal derating per Figure 1.
Does the PDZ12B-QF have a specified Zener test current other than 5 mA?
Yes-the datasheet specifies VZ at IZ = 5 mA as primary rating, but also provides characteristics at IZ = 0.5 mA (for leakage-sensitive applications) and defines non-repetitive peak current IZSM = 3.0 A at tp = 100 µs for transient protection analysis.
How does the temperature coefficient of +8.4 mV/K affect regulation accuracy over temperature?
At IZ = 5 mA, a +8.4 mV/K coefficient means VZ increases by 0.84 V over a 100 K rise (e.g., −40 °C to +60 °C junction). Combined with initial ±2 % tolerance, total VZ variation remains within ±3.2 % across automotive temperature range when used with proper thermal design.
Can PDZ12B-QF be used in series or parallel configurations for higher voltage or current handling?
No-Zener diodes like PDZ12B-QF are not designed for parallel operation due to mismatched VZ and thermal runaway risk. Series connection is possible for higher voltage, but requires individual current limiting resistors and matching of temperature coefficients to avoid imbalance.
PDZ12B-QF 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):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 9 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
PDZ12B-QF FAQ
1.How can I place an order for PDZ12B-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ12B-QF 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 PDZ12B-QF reliable?
The price and inventory of PDZ12B-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ12B-QF is usually 5 days.
3.What payment methods are accepted for PDZ12B-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ12B-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ12B-QF?
PDZ12B-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ12B-QF 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 PDZ12B-QF?
For technical support, including PDZ12B-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ12B-QF requirements.
6.How does Aetrix verify that PDZ12B-QF is sourced from the original manufacturer or authorized distributors?
All PDZ12B-QF 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 PDZ12B-QF meets industry standards.
7.What is the process for return or replacement of PDZ12B-QF?
All PDZ12B-QF units undergo pre-shipment inspection (PSI). If there is an issue with PDZ12B-QF, 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 PDZ12B-QF part is unused and in its original packaging.
Return procedure for PDZ12B-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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