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Nexperia USA Inc. PDZ18BGWX
- Part No.:
- PDZ18BGWX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
PDZ18BGWX.pdf
- Description:
- DIODE ZENER 18V 365MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:7,872
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Product details
Overview
PDZ18BGWX from Nexperia is a single Zener diode in SOD123 package, designed for precision voltage regulation and reference applications at nominal 18 V (IZ = 5 mA), with ±2 % tolerance (B-series), 80 Ω max differential resistance, and AEC-Q101 qualification for automotive environments.
For engineers reviewing the PDZ18BGWX datasheet, PDZ18BGWX pinout, PDZ18BGWX application, or PDZ18BGWX equivalent, this device is selected for stable low-power voltage clamping, ESD-protected bias networks, and temperature-compensated reference circuits where tight Zener voltage tolerance and low IR at VR ≤ 15 V are critical.
Technical Context
This Zener operates in reverse breakdown mode with a nominal working voltage of 17.56 V to 18.35 V at 5 mA test current, exhibiting a temperature coefficient of +14.4 mV/K - indicating positive thermal drift optimized for compensation in multi-diode reference strings. Its low 0.05 μA max reverse current at VR = 15 V supports high-impedance sensing nodes.
The device uses silicon planar technology with metallized cathode termination, enabling robust surge handling (40 W non-repetitive peak power, tp = 100 μs) and thermal resistance of 200 K/W (junction-to-solder point) on standard FR4 PCBs with 1 cm² cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17.56 V to 18.35 V at IZ = 5 mA - defines precise clamping threshold for 18 V nominal systems |
| Tolerance | ±2 % (B-series) - enables tighter regulation without post-production trimming |
| Differential Resistance (rdif) | ≤80 Ω - ensures minimal voltage shift under load current variation up to ±1 mA |
| Reverse Current (IR) | ≤0.05 μA at VR = 15 V - preserves signal integrity in high-impedance bias networks |
| Thermal Resistance (Rth(j-sp)) | 200 K/W - allows reliable operation up to 150 °C junction temperature with standard PCB layout |
| Non-repetitive Peak Power (PZSM) | 40 W (tp = 100 μs) - withstands transient overvoltage events like ISO 7637-2 pulse 1/2a |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
SOD123 surface-mount plastic package (3.75 × 2.55 × 1.3 mm), featuring molded body with cathode marking bar and tin-plated terminations compatible with lead-free reflow soldering per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode (K) | Connected to regulated output node; carries reverse current during Zener conduction |
| 2 | Anode (A) | Typically grounded or connected to lower-potential rail; completes reverse-bias path |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Reduces need for external calibration in 18 V reference designs, lowering BOM count |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics requiring -40 °C to +125 °C ambient operation |
| Low 0.05 μA reverse leakage at 15 V | Enables use in battery-monitoring IC bias rails without measurable discharge impact |
| 40 W non-repetitive surge rating | Provides inherent protection against load-dump transients without additional TVS devices |
| 200 K/W junction-to-solder-point Rth | Permits full 365 mW continuous dissipation on standard FR4 with minimal copper area |
Applications
| Automotive Sensor Biasing | Industrial Analog Reference |
|---|---|
|
Use Scenario: Providing stable 18 V bias to Hall-effect position sensors in engine control modules. IC Role / Device Role / Timing Role: Zener voltage reference establishing fixed operating point for sensor Wheatstone bridge excitation. Use Value: ±2 % tolerance and +14.4 mV/K temperature coefficient enable predictable bridge offset compensation across −40 °C to +125 °C. |
Use Scenario: Generating precision 18 V reference for 16-bit ADC front-end in programmable logic controllers. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage clamp stabilizing reference divider network. Use Value: 80 Ω differential resistance minimizes code-dependent reference error; 0.05 μA leakage avoids loading high-impedance op-amp inputs. |
| USB-C Power Negotiation Clamp | LED Driver Overvoltage Protection |
|
Use Scenario: Clamping CC line voltage during USB-PD communication to prevent PHY damage. IC Role / Device Role / Timing Role: Fast-response Zener shunt limiting transient spikes above 18 V while maintaining DC integrity. Use Value: 40 W surge rating absorbs 100 μs ESD pulses per IEC 61000-4-2 without degradation; SOD123 footprint fits space-constrained Type-C connectors. |
Use Scenario: Protecting constant-current LED driver ICs from bus overvoltage in architectural lighting systems. IC Role / Device Role / Timing Role: Standby-mode voltage clamp diverting excess energy when input exceeds 18 V. Use Value: 365 mW total power dissipation supports continuous clamping during brownout recovery; AEC-Q101 qualification ensures field reliability in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18 | ±5 % tolerance, 90 Ω rdif, no AEC-Q101 qualification | Acceptable for consumer-grade 18 V references but unsuitable for automotive or industrial temp range | Select when cost sensitivity outweighs tolerance and qualification requirements |
| MMSZ5245B | ±5 % tolerance, 200 mW Ptot, SOD-123 package, no AEC-Q101 | Limited to low-power biasing; cannot sustain 365 mW or handle automotive transients | Choose only for space-constrained non-automotive applications below 100 mW dissipation |
Compared with BZX84-C18 and MMSZ5245B, PDZ18BGWX delivers tighter voltage control, higher surge resilience, and automotive-grade reliability - making it the sole choice for 18 V regulation in safety-critical or thermally demanding deployments.
Availability
PDZ18BGWX is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog front-ends, and USB-C power interface protection requiring stable component supply with guaranteed long-term continuity.
Supply support for PDZ18BGWX 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 leading Dutch semiconductor manufacturer specializing in high-volume, high-reliability discrete and logic devices, with core expertise in automotive-qualified components and advanced packaging.
PDZ18BGWX belongs to the PDZ-GW series - engineered specifically for AEC-Q101-compliant voltage regulation in harsh-environment automotive and industrial systems where precision, surge immunity, and thermal stability are mandatory.
FAQ
What is the maximum continuous reverse current the PDZ18BGWX can handle at 25 °C ambient?
The PDZ18BGWX has a total power dissipation limit of 365 mW at Tamb ≤ 25 °C on standard FR4 PCB. At its nominal Zener voltage of ~18 V, this corresponds to a maximum continuous reverse current of approximately 20.3 mA (365 mW ÷ 18 V), assuming negligible forward drop and thermal derating.
Does the PDZ18BGWX require a heatsink for operation at full rated power?
No heatsink is required. With a junction-to-solder-point thermal resistance of 200 K/W and a 1 cm² cathode pad on FR4, the device achieves sufficient heat transfer to maintain Tj ≤ 150 °C at 365 mW dissipation - verified per Nexperia's mounting condition [3] in the datasheet.
How does the +14.4 mV/K temperature coefficient affect circuit performance?
The positive temperature coefficient means VZ increases by ~14.4 mV per °C rise in junction temperature. This characteristic is leveraged in temperature-compensated reference designs - for example, pairing with a negative-coefficient diode to achieve near-zero net drift across operating temperature ranges.
Can PDZ18BGWX replace older PDZ18B variants in existing designs?
Yes - PDZ18BGWX is a direct replacement for PDZ18B in the same SOD123 package, with identical electrical specifications, pinout, and AEC-Q101 qualification. The 'X' suffix denotes tape-and-reel packaging per standard ordering codes; electrical and thermal behavior are unchanged.
PDZ18BGWX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PDZ-GW
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±2.19%
- Power - Max:
- 365 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 13 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-123
PDZ18BGWX FAQ
1.How can I place an order for PDZ18BGWX through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ18BGWX 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 PDZ18BGWX reliable?
The price and inventory of PDZ18BGWX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ18BGWX is usually 5 days.
3.What payment methods are accepted for PDZ18BGWX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ18BGWX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ18BGWX?
PDZ18BGWX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ18BGWX 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 PDZ18BGWX?
For technical support, including PDZ18BGWX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ18BGWX requirements.
6.How does Aetrix verify that PDZ18BGWX is sourced from the original manufacturer or authorized distributors?
All PDZ18BGWX 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 PDZ18BGWX meets industry standards.
7.What is the process for return or replacement of PDZ18BGWX?
All PDZ18BGWX units undergo pre-shipment inspection (PSI). If there is an issue with PDZ18BGWX, 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 PDZ18BGWX part is unused and in its original packaging.
Return procedure for PDZ18BGWX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ18BGWX Tags
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