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Nexperia USA Inc. PDZ20B-QX
- Part No.:
- PDZ20B-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ20B-QX.pdf
- Description:
- DIODE ZENER 20V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,922
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Product details
Overview
PDZ20B-QX from Nexperia is a single Zener diode in SOD323 (SC-76) package, designed for precision voltage regulation at 20 V nominal working voltage with ±2 % tolerance, 100 Ω max differential resistance at IZ = 5 mA, and 0.05 μA max reverse current at VR = 15 V - used in automotive power rail clamping and low-power reference circuits.
For engineers reviewing the PDZ20B-QX datasheet, PDZ20B-QX pinout, PDZ20B-QX application, or PDZ20B-QX equivalent, this page delivers verified Zener parameters including VZ range (19.52–20.39 V), thermal resistance (Rth(j-a) = 340 K/W), AEC-Q101 qualification status, and SOD323 footprint compatibility for surface-mount design validation.
Technical Context
This Zener diode operates in reverse breakdown mode with hard knee characteristics, delivering stable 20 V regulation at IZ = 5 mA. Its low leakage (≤0.05 μA at 15 V) and tight tolerance support high-accuracy biasing in sensor interfaces and microcontroller reset circuits.
Thermal performance is defined by Rth(j-sp) = 130 K/W (junction-to-solder point) and Rth(j-a) = 340 K/W on FR4 PCB, enabling reliable operation up to Tj = +150 °C. It meets AEC-Q101 stress test requirements for automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (nominal) | 20 V - precise regulation target at IZ = 5 mA, with min/max of 19.52 V / 20.39 V |
| rdif | 100 Ω max - low dynamic impedance ensures minimal voltage shift under load variation |
| IR | 0.05 μA max at VR = 15 V - ultra-low leakage preserves battery life in always-on circuits |
| Ptot | 400 mW - sufficient for low-power regulation without heatsinking on standard FR4 PCB |
| Tolerance | ±2 % - enables predictable voltage margining in safety-critical automotive subsystems |
| Temp. coeff. (SZ) | +16.4 mV/K - positive coefficient allows compensation against negative-drift components |
| AEC-Q101 | Qualified - certified for automotive applications including body control modules and lighting drivers |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package: 2-terminal, 1.35 mm × 0.85 mm footprint, 0.45 mm height, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Sharp, well-defined Zener transition enables clean voltage clamping without soft saturation |
| Low leakage at low VR | 0.05 μA max at 15 V supports energy-efficient standby modes in infotainment systems |
| AEC-Q101 qualification | Validated for automotive temperature cycling, humidity, and mechanical shock per JESD22 |
| Small SOD323 footprint | 0.85 mm × 1.35 mm area saves board space in compact ECUs and ADAS sensor nodes |
| Stable temp. coefficient | +16.4 mV/K enables predictable drift behavior for temperature-compensated references |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Voltage reference for LIN bus transceiver biasing and microcontroller reset threshold in door module ECUs. IC Role / Device Role / Timing Role: Zener diode provides stable 20 V clamp to protect 5 V LDO input from load-dump transients. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure functional safety compliance in ASIL-B subsystems. |
Use Scenario: Precision reference for 16-bit ADC front-end in pressure transducer signal chain. IC Role / Device Role / Timing Role: Supplies regulated 20 V to op-amp bias network, minimizing offset drift across −40 °C to +125 °C. Use Value: 100 Ω rdif and +16.4 mV/K coefficient allow predictable error budgeting in calibration routines. |
| USB-C Power Delivery Clamp | Smart Lighting Driver Reference |
|
Use Scenario: Overvoltage protection clamp on 20 V PP (Programmable Power Supply) rail in USB-C PD sink designs. IC Role / Device Role / Timing Role: Shunts excess current during 24 V surge events while maintaining <0.05 μA leakage in normal operation. Use Value: 400 mW Ptot and 1.5 A non-repetitive IZSM enable single-device transient suppression without crowbar circuitry. |
Use Scenario: Stable bias source for constant-current LED driver IC in automotive interior lighting. IC Role / Device Role / Timing Role: Sets reference voltage for current-sense amplifier, directly influencing lumen consistency. Use Value: Low thermal resistance (340 K/W) prevents regulation shift during sustained 85 °C ambient operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C20 | Same 20 V nominal, but ±5 % tolerance and no AEC-Q101 qualification | Limited to commercial-grade consumer electronics; not suitable for automotive | Select when cost sensitivity outweighs automotive reliability requirements |
| MMSZ5249B | 20 V nominal, ±5 % tolerance, 500 mW Ptot, SOD-123 package (larger footprint) | Higher power handling but lacks AEC-Q101 and has looser tolerance | Prefer for industrial power supplies where board space is less constrained |
Compared with BZX84-C20 and MMSZ5249B, PDZ20B-QX offers tighter ±2 % tolerance, AEC-Q101 qualification, and optimized SOD323 footprint - making it the only choice for automotive voltage reference and clamping where precision and qualification are mandatory.
Availability
PDZ20B-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, USB-C power delivery clamping, and smart lighting driver reference requiring stable component supply across extended temperature ranges.
Supply support for PDZ20B-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 global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, analog, and discrete devices for automotive, industrial, and mobile markets.
PDZ20B-QX belongs to the PDZ-B-Q series of AEC-Q101-qualified Zener diodes engineered specifically for automotive voltage regulation and clamping in space-constrained, thermally demanding environments.
FAQ
What is the maximum reverse current for PDZ20B-QX at 15 V?
The maximum reverse current (IR) is 0.05 μA at VR = 15 V and Tj = 25 °C, as specified in Table 8 of the Nexperia datasheet. This ultra-low leakage supports energy-sensitive applications such as automotive always-on monitoring circuits and battery-backed sensors.
Is PDZ20B-QX suitable for reflow soldering?
Yes - PDZ20B-QX is qualified for lead-free reflow soldering per JEDEC J-STD-020. Figure 9 in the datasheet provides the recommended SOD323 reflow footprint (0.6 mm pad width, 1.65 mm pad length, 0.95 mm pitch), and the device withstands peak temperatures up to 260 °C for ≤30 seconds.
How does the temperature coefficient affect regulation accuracy?
PDZ20B-QX has a temperature coefficient of +16.4 mV/K at IZ = 5 mA. Over a −40 °C to +125 °C junction range, this contributes ±2.7 V drift - meaning system-level compensation (e.g., paired NTC or complementary Zener) is required for sub-1 % total regulation error in wide-temperature applications.
Can PDZ20B-QX replace PDZ20B in existing designs?
Yes - PDZ20B-QX is the automotive-qualified variant of PDZ20B, sharing identical electrical specs and SOD323 package. The "-QX" suffix denotes AEC-Q101 qualification and enhanced traceability; no layout or schematic changes are needed for drop-in replacement in new automotive designs.
PDZ20B-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):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15 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
PDZ20B-QX FAQ
1.How can I place an order for PDZ20B-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ20B-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 PDZ20B-QX reliable?
The price and inventory of PDZ20B-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ20B-QX is usually 5 days.
3.What payment methods are accepted for PDZ20B-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ20B-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ20B-QX?
PDZ20B-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ20B-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 PDZ20B-QX?
For technical support, including PDZ20B-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ20B-QX requirements.
6.How does Aetrix verify that PDZ20B-QX is sourced from the original manufacturer or authorized distributors?
All PDZ20B-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 PDZ20B-QX meets industry standards.
7.What is the process for return or replacement of PDZ20B-QX?
All PDZ20B-QX units undergo pre-shipment inspection (PSI). If there is an issue with PDZ20B-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 PDZ20B-QX part is unused and in its original packaging.
Return procedure for PDZ20B-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ20B-QX Tags
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MM5Z5V1ST1G
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