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Nexperia USA Inc. PDZ12B-QX
- Part No.:
- PDZ12B-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ12B-QX.pdf
- Description:
- DIODE ZENER 12V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,472
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Product details
Overview
PDZ12B-QX from Nexperia is a single Zener diode designed for precision voltage regulation in low-power 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 typical differential resistance, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the PDZ12B-QX datasheet, PDZ12B-QX pinout, PDZ12B-QX application, or PDZ12B-QX equivalent, this device is selected for stable reference generation in power supply feedback loops, overvoltage clamping in sensor interfaces, and ESD-protected voltage rail stabilization where low leakage (<0.1 µA at VR = 9.0 V) and hard breakdown knee are critical.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain a stable reference voltage across its cathode–anode terminals. Its 12 V nominal working voltage is specified at 5 mA test current, with temperature coefficient of +8.4 mV/K - indicating positive drift with junction temperature rise, enabling predictable compensation in thermal-aware designs.
The device exhibits low dynamic impedance (80 Ω typ. at IZ = 5 mA) and minimal leakage (≤0.1 µA at 9.0 V), supporting accurate regulation even under light-load conditions. Its SOD323 package delivers 130 K/W junction-to-solder-point thermal resistance, enabling reliable operation up to 150 °C junction temperature when mounted on standard FR4 PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.74 V to 12.24 V at IZ = 5 mA - defines tight regulation window for 12 V rail supervision |
| Differential Resistance (rdif) | 80 Ω typical - ensures minimal output voltage shift under load current variation |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 9.0 V - enables ultra-low quiescent current in battery-backed circuits |
| Power Dissipation (Ptot) | 400 mW at Tamb ≤ 25 °C - supports continuous regulation in compact SMD layouts without forced cooling |
| Temperature Coefficient (SZ) | +8.4 mV/K at IZ = 5 mA - allows predictable voltage drift modeling across −40 °C to +150 °C |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - confirms low-loss conduction in forward-biased protection paths |
| Junction Temperature (Tj) | −65 °C to +150 °C - meets extended-range requirements for automotive engine control modules |
Pinout & Package
PDZ12B-QX is housed in a SOD323 (SC-76) surface-mount plastic package measuring 1.8 mm × 1.35 mm × 0.95 mm, with gull-wing leads optimized for reflow soldering on FR4 PCBs using the footprint defined in Figure 9 of the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode (K) | Connected to regulated voltage node; reverse-bias anode connection enables Zener breakdown conduction |
| 2 | Anode (A) | Ground or lower-potential reference point; polarity marking bar on package identifies cathode terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A114 |
| Hard breakdown knee | Sharp, well-defined Zener transition enables precise clamping without soft saturation region ambiguity |
| Low dynamic impedance | 80 Ω typical at 5 mA ensures <1% output deviation across ±1 mA load changes |
| Small SOD323 footprint | 1.8 mm × 1.35 mm area saves board space in dense power management IC layouts |
| ±2 % voltage tolerance | Reduces need for post-assembly trimming in factory calibration of reference circuits |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Voltage reference for LIN bus transceiver biasing and microcontroller ADC reference in door module electronics. IC Role / Device Role / Timing Role: Zener diode providing stable 12 V reference for analog front-end scaling and fault detection thresholds. Use Value: Enables consistent ADC measurement accuracy across −40 °C to +125 °C ambient, supported by +8.4 mV/K tempco predictability. |
Use Scenario: Overvoltage clamp on 4–20 mA current loop receiver inputs exposed to transient surges. IC Role / Device Role / Timing Role: Shunt regulator limiting input voltage to protect op-amp input stages during ESD events. Use Value: Low 0.1 µA leakage avoids loading high-impedance sensor outputs; 80 Ω rdif ensures clamping within 50 mV of 12 V nominal. |
| Consumer Power Adapter Feedback | Medical Portable Device Battery Monitor |
|
Use Scenario: Secondary-side voltage sensing in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Precision reference for optocoupler feedback circuit regulating 12 V output rail. Use Value: Tight ±2 % VZ tolerance eliminates need for external trim resistors, reducing BOM count and calibration steps. |
Use Scenario: Reference voltage source for fuel gauge IC monitoring lithium-ion cell stack voltage in wearable monitors. IC Role / Device Role / Timing Role: Low-power Zener supplying stable bias to analog comparator detecting overvoltage faults. Use Value: 400 mW Ptot rating allows safe operation during brief surge events without thermal runaway, validated to AEC-Q101 stress limits. |
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 higher rdif (≥100 Ω); not AEC-Q101 qualified | Limited to commercial-grade consumer products; unsuitable for automotive under-hood use | Select when cost sensitivity outweighs precision and qualification requirements |
| MMSZ5242B | 12 V nominal, ±5 % tolerance, 100 Ω rdif, 500 mW Ptot; qualified to AEC-Q200 (passive component level), not Q101 | Acceptable for non-safety-critical automotive subsystems but lacks discrete semiconductor validation | Choose if higher power margin is needed and full AEC-Q101 compliance is not mandated |
Compared with BZX84-C12 and MMSZ5242B, PDZ12B-QX offers tighter voltage tolerance, lower dynamic impedance, and full AEC-Q101 qualification - making it the only option suitable for safety-relevant automotive voltage references requiring traceable stress-test validation.
Availability
PDZ12B-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioners, consumer power adapter feedback circuits, and medical portable device battery monitors requiring stable component supply with guaranteed long-term continuity.
Supply support for PDZ12B-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 delivering high-performance logic, discrete, and MOSFET devices with focus on efficiency, reliability, and miniaturization for automotive, industrial, and mobile markets.
PDZ12B-QX belongs to the PDZ-B-Q series of AEC-Q101-qualified Zener diodes engineered specifically for precision voltage regulation and overvoltage protection in harsh-environment automotive electronics.
FAQ
What is the maximum reverse voltage (VR) at which PDZ12B-QX guarantees ≤0.1 µA leakage?
PDZ12B-QX guarantees reverse leakage current ≤0.1 µA at VR = 9.0 V, as specified in Table 8 of the datasheet. This value is measured at Tj = 25 °C and defines the upper limit of applied reverse bias before significant leakage begins - critical for low-power standby circuits.
Can PDZ12B-QX be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients below ~5 V and positive above, but even within the same batch, minor VZ mismatches cause current hogging. PDZ12B-QX's +8.4 mV/K tempco does not ensure balanced sharing; parallel use risks thermal runaway and premature failure.
Is the SOD323 package compatible with standard IPC-7351B land patterns?
Yes - the recommended reflow soldering footprint in Figure 9 specifies 0.6 mm pad width, 0.5 mm pad length, and 0.95 mm pad pitch, aligning with IPC-7351B generic SOD323 land pattern (SOD323_1.8x1.35mm_P0.95mm). Thermal relief and solder mask expansion follow standard Class 2 guidelines.
Does PDZ12B-QX require derating above 25 °C ambient temperature?
Yes - the power derating curve (Figure 1) shows linear reduction from 400 mW at 25 °C to 0 mW at 150 °C. At 85 °C ambient, maximum allowable Ptot is approximately 240 mW, calculated via Rth(j-a) = 340 K/W and Tj(max) = 150 °C.
PDZ12B-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):
- 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-QX FAQ
1.How can I place an order for PDZ12B-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ12B-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 PDZ12B-QX reliable?
The price and inventory of PDZ12B-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ12B-QX is usually 5 days.
3.What payment methods are accepted for PDZ12B-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ12B-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ12B-QX?
PDZ12B-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ12B-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 PDZ12B-QX?
For technical support, including PDZ12B-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ12B-QX requirements.
6.How does Aetrix verify that PDZ12B-QX is sourced from the original manufacturer or authorized distributors?
All PDZ12B-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 PDZ12B-QX meets industry standards.
7.What is the process for return or replacement of PDZ12B-QX?
All PDZ12B-QX units undergo pre-shipment inspection (PSI). If there is an issue with PDZ12B-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 PDZ12B-QX part is unused and in its original packaging.
Return procedure for PDZ12B-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ12B-QX Tags
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