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Nexperia USA Inc. PDZ11B-QX
- Part No.:
- PDZ11B-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ11B-QX.pdf
- Description:
- DIODE ZENER 11V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,893
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Product details
Overview
PDZ11B-QX from Nexperia is a single Zener diode in SOD323 (SC-76) package, designed for precision voltage regulation at 11.0 V nominal working voltage with ±2 % tolerance, 60 Ω max differential resistance at IZ = 5 mA, and 0.1 μA max reverse current at VR = 8.0 V - used in automotive power rail clamping and low-power reference circuits.
For engineers reviewing the PDZ11B-QX datasheet, PDZ11B-QX pinout, PDZ11B-QX application, or PDZ11B-QX equivalent, this device supports AEC-Q101-compliant designs requiring stable 11 V regulation, low leakage, hard breakdown knee, and surface-mount compatibility on FR4 PCBs with standard reflow footprints.
Technical Context
This Zener diode operates as a two-terminal voltage reference with cathode-anode polarity, exhibiting sharp reverse breakdown at 10.78–11.22 V (IZ = 5 mA), temperature coefficient of +7.4 mV/K, and 108 pF capacitance at 1 MHz and 0 V. Its thermal resistance is 340 K/W junction-to-ambient on standard FR4.
It delivers 400 mW total power dissipation at Tamb ≤ 25 °C, derating linearly above that temperature, and sustains non-repetitive peak reverse current up to 3.0 A (tp = 100 μs). Forward voltage is 0.9 V at 10 mA and 1.1 V at 100 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VZ) | 10.78–11.22 V at IZ = 5 mA - defines precise clamping threshold for 11 V rails |
| Differential Resistance (rdif) | ≤ 60 Ω - ensures minimal voltage shift under load variation |
| Reverse Current (IR) | ≤ 0.1 μA at VR = 8.0 V - enables ultra-low standby power loss |
| Temperature Coefficient (SZ) | +7.4 mV/K - provides predictable positive drift for thermal compensation schemes |
| Diode Capacitance (Cd) | 108 pF at 1 MHz, 0 V - limits high-frequency noise coupling in signal-path references |
| Total Power Dissipation (Ptot) | 400 mW at Tamb = 25 °C - sets maximum continuous clamping energy on standard FR4 |
| Junction Temperature (Tj) | −65 to +150 °C - supports operation in under-hood automotive environments |
Pinout & Package
PDZ11B-QX uses the SOD323 (SC-76) plastic surface-mounted package: 1.7 mm × 1.3 mm body, 0.45 mm height, cathode marked by a bar on the top surface. Mounting requires standard reflow footprint per Figure 9 (0.6 mm solder land width, 0.95 mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Hard breakdown knee | Sharp, low-hysteresis transition into conduction improves regulation accuracy at low currents |
| Very low leakage current | 0.1 μA max at 8.0 V enables use in battery-backed or ultra-low-power monitoring circuits |
| Small SOD323 footprint | 0.6 mm pitch, 1.7 × 1.3 mm area saves board space in dense automotive ECUs |
| ±2 % voltage tolerance | Tighter than standard Zeners, reducing need for post-production trimming in reference designs |
Applications
| Automotive ECU Power Rail Clamping | Low-Power Sensor Reference Supply |
|---|---|
Use Scenario: Protecting microcontroller I/O pins and CAN transceivers from load-dump transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Zener clamp placed between supply rail and ground to shunt overvoltage spikes above 11 V. Use Value: With 3.0 A non-repetitive surge rating and 108 pF capacitance, it responds rapidly without distorting signal integrity on adjacent traces. |
Use Scenario: Providing stable 11 V bias to analog front-end circuitry in tire pressure sensors and ambient light modules. IC Role / Device Role / Timing Role: Two-terminal voltage reference establishing fixed bias point for op-amp comparators and ADC references. Use Value: 0.1 μA reverse leakage and +7.4 mV/K temperature coefficient allow accurate calibration across −40 to +125 °C operating range. |
| Industrial PLC Input Protection | Consumer USB-C Port Overvoltage Clamp |
Use Scenario: Safeguarding 24 V digital input channels against field-wiring faults and inductive kickback in factory automation controllers. IC Role / Device Role / Timing Role: Reverse-biased Zener connected across input terminals to clamp transient excursions beyond rated voltage. Use Value: 60 Ω dynamic impedance ensures clamping voltage stays within 11.22 V + (Isurge × 60 Ω), maintaining logic-level compatibility. |
Use Scenario: Limiting voltage on VBUS lines during hot-plug events or adapter mismatches in portable chargers and power banks. IC Role / Device Role / Timing Role: Standby protection element absorbing brief overvoltage pulses before system-level shutdown activates. Use Value: SOD323 package allows placement directly at USB-C connector pads, minimizing trace inductance and improving response time to <100 ns surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C11 | Same 11 V nominal, but ±5 % tolerance, higher 100 Ω rdif, no AEC-Q101 qualification | Limited to commercial-grade consumer products; unsuitable for automotive under-hood use | Select when cost sensitivity outweighs precision and qualification requirements |
| MMSZ5240B | 11 V nominal, ±5 % tolerance, 150 Ω rdif, 0.1 μA IR, SOD-123 package (larger footprint) | Compatible with wave-soldered legacy boards; lacks automotive qualification and tight rdif | Choose only if SOD-123 footprint is mandated and AEC-Q101 is not required |
Compared with BZX84-C11 and MMSZ5240B, PDZ11B-QX offers tighter voltage tolerance, lower dynamic impedance, and AEC-Q101 validation - making it the sole choice for production automotive designs demanding 11 V regulation stability and reliability.
Availability
PDZ11B-QX is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, and low-power sensor reference supply requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for PDZ11B-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 high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.
PDZ11B-QX belongs to the PDZ-B-Q series - engineered specifically for AEC-Q101-compliant automotive voltage regulation, emphasizing low leakage, hard breakdown, and SOD323 space efficiency in harsh environments.
FAQ
What is the maximum continuous reverse current PDZ11B-QX can sustain at 25 °C?
The device does not specify a maximum continuous reverse current; instead, it is rated for 400 mW total power dissipation at Tamb ≤ 25 °C. At its nominal 11 V Zener voltage, this corresponds to ~36 mA continuous Zener current (P = V × I → I = 400 mW / 11 V ≈ 36 mA), assuming no additional forward-bias heating.
Does PDZ11B-QX require a series current-limiting resistor in typical regulator applications?
Yes - like all Zener diodes, PDZ11B-QX must be used with an external series resistor to limit current and prevent thermal runaway. The resistor value is calculated based on supply voltage, desired Zener current (e.g., 5 mA for spec compliance), and the diode's VZ and power rating.
How does the +7.4 mV/K temperature coefficient affect circuit performance?
This positive coefficient means VZ increases by ~7.4 mV per degree Celsius rise in junction temperature. In precision references, it can be compensated using negative-TC components; in clamping applications, it ensures higher trip voltage at elevated temperatures - enhancing safety margin during thermal stress.
Can PDZ11B-QX be used in parallel for higher power handling?
No - Zener diodes exhibit parameter spread; paralleling them causes current imbalance and potential thermal runaway. For higher power, use a single higher-rated device or active regulation. PDZ11B-QX is strictly a single-diode solution rated for 400 mW max on FR4.
PDZ11B-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):
- 11 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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
PDZ11B-QX FAQ
1.How can I place an order for PDZ11B-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ11B-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 PDZ11B-QX reliable?
The price and inventory of PDZ11B-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ11B-QX is usually 5 days.
3.What payment methods are accepted for PDZ11B-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ11B-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ11B-QX?
PDZ11B-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ11B-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 PDZ11B-QX?
For technical support, including PDZ11B-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ11B-QX requirements.
6.How does Aetrix verify that PDZ11B-QX is sourced from the original manufacturer or authorized distributors?
All PDZ11B-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 PDZ11B-QX meets industry standards.
7.What is the process for return or replacement of PDZ11B-QX?
All PDZ11B-QX units undergo pre-shipment inspection (PSI). If there is an issue with PDZ11B-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 PDZ11B-QX part is unused and in its original packaging.
Return procedure for PDZ11B-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ11B-QX Tags
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