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Nexperia USA Inc. PDZ36B-QX
- Part No.:
- PDZ36B-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ36B-QX.pdf
- Description:
- DIODE ZENER 36V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,204
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Product details
Overview
PDZ36B-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 36 V (min 35.07 V, max 36.87 V at IZ = 5 mA), ±2 % tolerance, 60 Ω maximum differential resistance at 5 mA, and AEC-Q101 qualification for automotive use.
For engineers reviewing the PDZ36B-QX datasheet, PDZ36B-QX pinout, PDZ36B-QX application, or PDZ36B-QX equivalent, this device is selected for stable reference generation in power supply feedback loops, overvoltage clamping in sensor interfaces, and ESD-robust voltage stabilization where SOD323 footprint, low leakage (<0.05 µA at VR = 27 V), and hard breakdown knee are critical.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its cathode–anode terminals. Its 36 V nominal working voltage targets mid-to-high-voltage regulation nodes, with temperature coefficient of +27 mV/K (typ) and +33 mV/K (max) at IZ = 5 mA - indicating positive thermal drift suitable for compensation-aware designs.
Thermal performance is defined by Rth(j-sp) = 130 K/W (junction-to-solder point) and Rth(j-a) = 340 K/W (junction-to-ambient on FR4 PCB), enabling reliable operation up to Tj = +150 °C and supporting continuous power dissipation derating above +25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 35.07 V (min) to 36.87 V (max) at IZ = 5 mA - defines tight regulation window for 36 V rail monitoring |
| Differential Resistance rdif | ≤300 Ω at IZ = 0.5 mA; ≤60 Ω at IZ = 5 mA - ensures low output impedance under nominal bias |
| Reverse Current IR | ≤0.05 µA at VR = 27 V - enables ultra-low standby leakage in battery-backed circuits |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - supports efficient forward conduction during transient polarity reversal |
| Total Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C on standard FR4 PCB - sets thermal design boundary for compact layouts |
| Non-repetitive Peak Reverse Current IZSM | 0.8 A (tp = 100 µs) - provides surge immunity against short-duration transients |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in under-hood automotive environments |
Pinout & Package
PDZ36B-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 and space-constrained PCBs. The cathode is marked by a bar on the package top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; reverse-bias terminal where Zener breakdown occurs |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes bias path for controlled current flow |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Hard breakdown knee | Sharp, well-defined Zener transition minimizes regulation uncertainty near knee current |
| Low dynamic impedance | 60 Ω typical at 5 mA enables stable voltage reference under varying load conditions |
| Ultra-low leakage current | <0.05 µA at 27 V supports energy-efficient standby modes in always-on systems |
| SOD323 footprint compatibility | Standardized 0.95 mm pitch enables automated placement and high-density routing |
Applications
| Automotive Sensor Reference | Industrial Power Supply Feedback |
|---|---|
|
Use Scenario: Stabilizing reference voltage for analog front-end of pressure/temperature sensors in engine bay modules. IC Role / Device Role / Timing Role: Zener diode providing precise 36 V reference for ADC biasing and signal conditioning circuitry. Use Value: Maintains <±0.7 V regulation error over −40 °C to +125 °C ambient due to AEC-Q101 thermal stability and low rdif. |
Use Scenario: Voltage sensing node in isolated flyback converter feedback loop for 36 V output rail. IC Role / Device Role / Timing Role: Zener clamp regulating optocoupler LED current to maintain output voltage accuracy. Use Value: Enables ±2 % output regulation tolerance via tight VZ tolerance and minimal temperature-induced drift (+27 mV/K). |
| ESD-Protected Interface Clamp | Battery Management Overvoltage Detection |
|
Use Scenario: Secondary clamping element on CAN or LIN bus lines exposed to ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Fast-response Zener absorbing transient energy while limiting line voltage to safe levels. Use Value: Withstands 0.8 A non-repetitive surges (100 µs) and exhibits hard breakdown to prevent latch-up in downstream transceivers. |
Use Scenario: Overvoltage detection threshold in 36 V lithium-iron-phosphate (LiFePO4) battery pack monitor. IC Role / Device Role / Timing Role: Reference element triggering protection circuit when cell stack exceeds 36.87 V. Use Value: Guarantees trip point accuracy within ±0.9 V using max VZ spec and <0.05 µA leakage to avoid false triggers during low-current sleep states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C36 | Same 36 V nominal VZ, but ±5 % tolerance and no AEC-Q101 qualification; SOT23 package (larger footprint) | Not rated for automotive under-hood use; higher leakage (~0.1 µA) limits low-power designs | Select when cost sensitivity outweighs automotive qualification and leakage requirements |
| MMSZ5245B | 36 V nominal VZ, ±5 % tolerance, 100 Ω rdif at 20 mA, SOD123 package (higher thermal resistance) | Larger Rth(j-a) (400 K/W) reduces power handling on same PCB; not AEC-Q101 qualified | Prefer for non-automotive consumer applications where board space allows larger package |
Compared with BZX84-C36 and MMSZ5245B, PDZ36B-QX delivers tighter voltage tolerance (±2 % vs ±5 %), lower dynamic impedance (60 Ω vs ≥100 Ω), and guaranteed automotive reliability - making it optimal for safety-critical voltage references where precision and qualification are mandatory.
Availability
PDZ36B-QX is available at Aetrix Electronics and suitable for automotive sensor modules, industrial power supply feedback networks, ESD-protected communication interfaces, and battery management overvoltage detection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for PDZ36B-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, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and mobile markets.
PDZ36B-QX belongs to the PDZ-B-Q series of AEC-Q101-qualified Zener diodes engineered specifically for robust voltage regulation in harsh-environment automotive electronics and high-reliability industrial systems.
FAQ
What is the maximum reverse voltage PDZ36B-QX can withstand before breakdown?
The PDZ36B-QX has a nominal Zener voltage of 36 V, with minimum and maximum values of 35.07 V and 36.87 V respectively at IZ = 5 mA. Breakdown begins within this range; operation above 36.87 V risks exceeding absolute maximum ratings. Its non-repetitive peak reverse current rating is 0.8 A for 100 µs pulses, not steady-state voltage endurance.
How does PDZ36B-QX perform thermally on a standard FR4 PCB?
When mounted on a standard FR4 PCB with single-sided copper and tin plating, PDZ36B-QX exhibits Rth(j-a) = 340 K/W and Rth(j-sp) = 130 K/W. At 25 °C ambient, it supports 400 mW total dissipation; power must be linearly derated above 25 °C, reaching zero at ~150 °C ambient per the published derating curve.
Is PDZ36B-QX suitable for bidirectional ESD protection?
No - PDZ36B-QX is a unidirectional Zener diode configured for reverse-bias regulation only. Its forward voltage is 0.9 V at 10 mA, but it lacks symmetric clamping capability. For bidirectional ESD protection, purpose-built TVS diodes such as PESD36VS1UB (36 V uni-directional) or PESD5V0S1BA (5 V bi-directional) are required.
What marking code identifies PDZ36B-QX on the package?
PDZ36B-QX is marked with "ZU" on the top surface of the SOD323 package. The marking bar adjacent to pin 1 indicates the cathode terminal, consistent with standard Zener diode polarity identification per Nexperia's marking table.
PDZ36B-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):
- 36 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27 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
PDZ36B-QX FAQ
1.How can I place an order for PDZ36B-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ36B-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 PDZ36B-QX reliable?
The price and inventory of PDZ36B-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ36B-QX is usually 5 days.
3.What payment methods are accepted for PDZ36B-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ36B-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ36B-QX?
PDZ36B-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ36B-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 PDZ36B-QX?
For technical support, including PDZ36B-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ36B-QX requirements.
6.How does Aetrix verify that PDZ36B-QX is sourced from the original manufacturer or authorized distributors?
All PDZ36B-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 PDZ36B-QX meets industry standards.
7.What is the process for return or replacement of PDZ36B-QX?
All PDZ36B-QX units undergo pre-shipment inspection (PSI). If there is an issue with PDZ36B-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 PDZ36B-QX part is unused and in its original packaging.
Return procedure for PDZ36B-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ36B-QX Tags
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