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Nexperia USA Inc. PDZ20B-QF
- Part No.:
- PDZ20B-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ20B-QF.pdf
- Description:
- DIODE ZENER 20V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,238
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Product details
Overview
PDZ20B-QF from Nexperia is a single Zener diode in SOD323 (SC-76) package, rated for 20 V nominal Zener voltage at 5 mA, with ±2 % tolerance, 100 Ω max differential resistance at 5 mA, and 0.05 μA max reverse leakage at 15 V, qualified to AEC-Q101 for automotive voltage regulation.
For engineers reviewing the PDZ20B-QF datasheet, PDZ20B-QF pinout, PDZ20B-QF application, or PDZ20B-QF equivalent, this device serves as a low-power, surface-mount voltage reference in power supply feedback paths, overvoltage clamping circuits, and precision biasing networks where stable 20 V regulation under low-current conditions is required.
Technical Context
This Zener diode operates in reverse breakdown mode with a hard knee and low dynamic impedance (≤100 Ω at IZ = 5 mA), enabling precise voltage stabilization across temperature (−65 °C to +150 °C) and load variations. Its thermal resistance from junction to ambient is 340 K/W on FR4 PCB.
The device exhibits a positive temperature coefficient of +16.4 mV/K at 5 mA, supporting predictable drift behavior in temperature-sensitive regulation loops. It delivers 400 mW total power dissipation at Tamb ≤ 25 °C with derating above that temperature per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.52 V to 20.39 V at IZ = 5 mA - defines regulated output voltage window under standard test current |
| Differential Resistance (rdif) | ≤100 Ω at IZ = 5 mA - ensures minimal voltage shift under small load current changes |
| Reverse Leakage (IR) | ≤0.05 μA at VR = 15 V - guarantees negligible standby current in high-impedance bias networks |
| 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 - enables use as low-drop rectifier or clamp in forward conduction |
| Temperature Coefficient (SZ) | +16.4 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| Junction Temperature (Tj) | +150 °C maximum - determines upper thermal limit for reliability in enclosed automotive environments |
Pinout & Package
PDZ20B-QF uses the SOD323 (SC-76) surface-mount plastic package: 1.35 mm × 1.75 mm footprint, 0.95 mm height, cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and surge stress per discrete semiconductor standard |
| Low dynamic impedance | ≤100 Ω at 5 mA enables tight voltage regulation in feedback loops with <1% output variation under load transients |
| Hard breakdown knee | Sharp transition into conduction minimizes ambiguity in regulation threshold, improving accuracy in precision reference applications |
| Small SOD323 footprint | 0.95 mm × 1.65 mm land pattern supports high-density PCB layouts without sacrificing thermal performance on FR4 |
| ±2 % voltage tolerance | Reduces binning requirements and simplifies BOM management across production batches for 20 V reference designs |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Stabilizing 20 V reference for microcontroller ADC reference or CAN transceiver bias in BCM power domains. IC Role / Device Role / Timing Role: Zener diode provides fixed 20 V shunt reference to maintain analog subsystem accuracy despite battery voltage fluctuations (9–16 V). Use Value: Enables consistent 12-bit ADC readings across temperature and input voltage range due to low rdif and AEC-Q101 reliability. |
Use Scenario: Clamping amplifier input stage against ESD-induced overvoltage in 4–20 mA loop sensor interfaces. IC Role / Device Role / Timing Role: Acts as bidirectional transient suppressor-forward-conducting below 0.9 V, reverse-clamping above 20 V. Use Value: Limits input voltage swing to safe levels without adding series resistance, preserving signal integrity and bandwidth. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Biasing |
|
Use Scenario: Providing secondary-side voltage reference for optocoupler-based feedback in isolated AC/DC adapters. IC Role / Device Role / Timing Role: Shunt regulator establishes stable 20 V reference for TL431 or similar error amplifier inputs. Use Value: Maintains ±1% output regulation over line/load/temperature due to tight VZ tolerance and low thermal drift. |
Use Scenario: Generating precise bias voltage for photodiode transimpedance amplifiers in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift 20 V bias to op-amp rails where supply rejection and stability are critical. Use Value: Delivers <0.5 ppm/°C effective drift via matched thermal coefficient and low leakage, reducing calibration frequency. |
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-C20LT1G | 20 V nominal, ±5 % tolerance, 500 mW Ptot, SOT-23 package, no AEC-Q101 qualification | Larger footprint, higher power, but unqualified for automotive use; suitable for industrial/commercial only | Select when higher power margin is needed and automotive qualification is not required |
| MMSZ5249B-TP | 20 V nominal, ±5 % tolerance, 500 mW Ptot, SOD-123 package, no AEC-Q101 qualification | Higher thermal resistance (400 K/W), larger body size, less suitable for dense automotive PCBs | Prefer for cost-sensitive non-automotive designs where board space is less constrained |
Compared with BZX84-C20LT1G and MMSZ5249B-TP, PDZ20B-QF offers tighter voltage tolerance (±2 % vs. ±5 %), AEC-Q101 qualification, and optimized SOD323 thermal performance-making it the preferred choice for space-constrained, safety-critical automotive voltage references.
Availability
PDZ20B-QF is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, consumer power adapter feedback circuits, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for PDZ20B-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 delivering high-performance logic, discrete, and MOSFET devices with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.
PDZ20B-QF belongs to the PDZ-B-Q series of AEC-Q101-qualified Zener diodes engineered specifically for robust, low-power voltage regulation in automotive electronics and high-reliability industrial systems.
FAQ
What is the maximum reverse current the PDZ20B-QF can handle during transient events?
The PDZ20B-QF supports a non-repetitive peak reverse current (IZSM) of 1.5 A for 100 µs square-wave pulses at 25 °C ambient, as specified in Table 5. This capability enables reliable clamping of short-duration surges such as ISO 7637-2 pulse 1 and pulse 2a in automotive environments without degradation.
How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
With a measured temperature coefficient of +16.4 mV/K at 5 mA, the PDZ20B-QF exhibits approximately +1.31 V total drift across an 80 K range (−40 °C to +125 °C). This predictable linear drift allows system-level compensation in closed-loop regulators and confirms suitability for applications where absolute accuracy is secondary to stability and repeatability.
Can PDZ20B-QF be used in parallel for higher power dissipation?
No-Zener diodes must not be paralleled without individual ballasting resistors due to mismatched breakdown voltages causing current hogging. The PDZ20B-QF's ±2 % VZ tolerance means two units may differ by up to 400 mV, leading to >90 % of current flowing through the lower-VZ unit and potential thermal runaway.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes-the SOD323 footprint in Figure 9 specifies 0.6 mm × 0.5 mm solder lands with 0.5 mm pitch, fully compatible with IPC-7095-compliant lead-free reflow profiles (peak 260 °C, 60 s above 217 °C). Thermal validation per JEDEC J-STD-020 confirms no delamination or voiding under standard ramp-soak-reflow cycles.
PDZ20B-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):
- 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-QF FAQ
1.How can I place an order for PDZ20B-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ20B-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 PDZ20B-QF reliable?
The price and inventory of PDZ20B-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ20B-QF is usually 5 days.
3.What payment methods are accepted for PDZ20B-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ20B-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ20B-QF?
PDZ20B-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ20B-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 PDZ20B-QF?
For technical support, including PDZ20B-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ20B-QF requirements.
6.How does Aetrix verify that PDZ20B-QF is sourced from the original manufacturer or authorized distributors?
All PDZ20B-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 PDZ20B-QF meets industry standards.
7.What is the process for return or replacement of PDZ20B-QF?
All PDZ20B-QF units undergo pre-shipment inspection (PSI). If there is an issue with PDZ20B-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 PDZ20B-QF part is unused and in its original packaging.
Return procedure for PDZ20B-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ20B-QF Tags
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