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Nexperia USA Inc. PDZ20B-QZ
- Part No.:
- PDZ20B-QZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ20B-QZ.pdf
- Description:
- DIODE ZENER 20V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,704
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Product details
Overview
PDZ20B-QZ 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, 0.05 μA max reverse current at VR = 15 V, and AEC-Q101 qualification for automotive use.
For engineers reviewing the PDZ20B-QZ datasheet, PDZ20B-QZ pinout, PDZ20B-QZ application, or PDZ20B-QZ equivalent, this device supports low-power voltage reference, overvoltage clamping, and bias stabilization in space-constrained automotive ECUs, sensor signal conditioning circuits, and industrial power supply feedback paths.
Technical Context
This Zener diode operates in reverse breakdown mode with a hard knee characteristic, delivering stable 20 V regulation at IZ = 5 mA. Its low leakage (≤0.05 μA at 15 V) and tight 19.52–20.39 V working voltage range ensure minimal quiescent error in reference circuits.
Thermal performance is defined by Rth(j-a) = 340 K/W on FR4 PCB and Tj rating up to +150 °C, enabling reliable operation in under-hood automotive environments where ambient temperatures exceed 105 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage VZ | 19.52–20.39 V at IZ = 5 mA - defines precise clamping threshold for 20 V rail protection |
| Differential Resistance rdif | ≤100 Ω at IZ = 5 mA - ensures minimal output voltage shift under load variation |
| Reverse Current IR | ≤0.05 μA at VR = 15 V - enables ultra-low standby power in always-on circuits |
| Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C - supports continuous regulation without heatsinking in SOD323 |
| Temperature Coefficient SZ | +15.0 to +16.4 mV/K at IZ = 5 mA - provides predictable positive drift for thermal compensation design |
| Junction Temperature Tj | −65 to +150 °C - meets extended temperature requirements of automotive Grade 1 systems |
| Package | SOD323 (SC-76) - 1.35 × 1.75 mm footprint ideal for high-density PCB layouts |
Pinout & Package
SOD323 plastic surface-mounted package with cathode marked by a bar on the body; compact 2-pin outline optimized for automated placement and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential reference; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| Hard breakdown knee | Sharp, well-defined Zener transition minimizes regulation hysteresis in feedback loops |
| Low dynamic impedance | 100 Ω max at 5 mA enables stable reference under dynamic load transients |
| Ultra-low leakage | 0.05 μA max at 15 V supports battery-backed circuits with multi-year shelf life |
| Small SMD footprint | SOD323 package occupies <1.5 mm² PCB area-critical for compact ECU modules |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 20 V reference for analog-to-digital converter (ADC) biasing in diesel ECU microcontrollers. IC Role / Device Role / Timing Role: Zener voltage reference source for ADC VREF input, ensuring consistent full-scale calibration across temperature. Use Value: ±2 % tolerance and +15.0 mV/K temperature coefficient allow predictable offset correction in firmware calibration routines. |
Use Scenario: Clamping amplifier output in 4–20 mA current loop transmitters exposed to 24 V supply surges. IC Role / Device Role / Timing Role: Reverse-biased overvoltage protector limiting op-amp output swing to safe levels. Use Value: 100 Ω differential resistance ensures clamp voltage remains within 0.5 V of 20 V even during 10 mA transient currents. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Biasing |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters powering USB-C PD accessories. IC Role / Device Role / Timing Role: Zener element in optocoupler feedback network regulating output voltage accuracy. Use Value: 400 mW power rating sustains continuous dissipation during no-load hold-up conditions without derating. |
Use Scenario: Setting bias point for photodiode amplifiers in portable pulse oximeters operating from coin-cell batteries. IC Role / Device Role / Timing Role: Low-leakage voltage reference establishing DC operating point for transimpedance amplifier. Use Value: 0.05 μA reverse current prevents measurable discharge of CR2032 battery over 12-month device shelf life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C20 | Same 20 V nominal, but ±5 % tolerance and higher 250 Ω rdif; SOT23 package (larger footprint) | Lacks AEC-Q101 qualification; not recommended for automotive production | Select when cost sensitivity outweighs automotive compliance and regulation precision |
| MMSZ5249B | 20 V nominal, ±5 % tolerance, 150 Ω rdif, 0.1 μA IR at 15 V; SOD123 package | Higher thermal resistance (Rth(j-a) ≈ 500 K/W); unsuitable for high-ambient automotive zones | Prefer for non-automotive industrial designs where board space allows larger SOD123 |
Compared with BZX84-C20 and MMSZ5249B, PDZ20B-QZ delivers tighter voltage tolerance, lower dynamic impedance, and automotive-grade reliability in the smallest footprint-making it optimal for next-generation ECU and ADAS modules where size, precision, and qualification are jointly critical.
Availability
PDZ20B-QZ is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor transmitters, and medical diagnostic equipment requiring stable component supply with AEC-Q101 assurance and long-term lifecycle support.
Supply support for PDZ20B-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 logic, discrete, and MOSFET devices with emphasis on automotive and industrial reliability.
The PDZ-B-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for precision voltage regulation in harsh-environment automotive subsystems and high-reliability industrial instrumentation.
FAQ
What is the maximum reverse current specification for PDZ20B-QZ at 15 V?
The maximum reverse current (IR) for PDZ20B-QZ is 0.05 μA at VR = 15 V and Tj = 25 °C, verified per Table 8 of the official Nexperia datasheet Rev. 2. This ultra-low leakage supports energy-sensitive applications such as battery-powered sensors and always-on monitoring circuits.
Is PDZ20B-QZ compatible with lead-free reflow soldering processes?
Yes-PDZ20B-QZ uses a standard SOD323 package with matte tin (Sn) termination and is rated for JEDEC J-STD-020D-compliant lead-free reflow profiles, including peak temperatures up to 260 °C. The recommended reflow footprint matches Figure 9 in the datasheet.
How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
PDZ20B-QZ exhibits a typical temperature coefficient of +15.0 to +16.4 mV/K at IZ = 5 mA. Over −40 °C to +125 °C, this results in a total VZ shift of approximately ±2.5 V, which must be accounted for in high-accuracy references using external compensation or calibration.
Can PDZ20B-QZ be used in parallel for higher power handling?
No-Zener diodes should not be paralleled due to mismatched breakdown voltages causing current hogging. For >400 mW dissipation, use a single higher-rated Zener or implement active regulation; the PDZ20B-QZ datasheet specifies Ptot = 400 mW absolute maximum on FR4 PCB.
PDZ20B-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):
- 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-QZ FAQ
1.How can I place an order for PDZ20B-QZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ20B-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 PDZ20B-QZ reliable?
The price and inventory of PDZ20B-QZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ20B-QZ is usually 5 days.
3.What payment methods are accepted for PDZ20B-QZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ20B-QZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ20B-QZ?
PDZ20B-QZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ20B-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 PDZ20B-QZ?
For technical support, including PDZ20B-QZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ20B-QZ requirements.
6.How does Aetrix verify that PDZ20B-QZ is sourced from the original manufacturer or authorized distributors?
All PDZ20B-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 PDZ20B-QZ meets industry standards.
7.What is the process for return or replacement of PDZ20B-QZ?
All PDZ20B-QZ units undergo pre-shipment inspection (PSI). If there is an issue with PDZ20B-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 PDZ20B-QZ part is unused and in its original packaging.
Return procedure for PDZ20B-QZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ20B-QZ Tags
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