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Nexperia USA Inc. PDZ33B/ZLX
- Part No.:
- PDZ33B/ZLX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ33B/ZLX.pdf
- Description:
- DIODE ZENER 33V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,591
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Product details
Overview
PDZ33B/ZLX from Nexperia is a 33 V, 400 mW Zener diode with ±5% tolerance, 100 µA test current, and 700 mΩ dynamic resistance, used for voltage regulation and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the PDZ33B/ZLX datasheet, PDZ33B/ZLX pinout, PDZ33B/ZLX application, or PDZ33B/ZLX equivalent, key selection factors include Zener voltage accuracy, power dissipation limit, dynamic impedance at operating current, and SOD-123 package thermal performance in space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and supply conditions. It is characterized at IZ = 100 µA and specified for operation up to 400 mW at Tamb = 25 °C with derating above that temperature.
The device exhibits a typical Zener impedance of 700 mΩ at IZ = 1 mA and a maximum leakage current of 1 µA at 25.4 V, ensuring tight regulation in precision biasing networks and feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% - defines regulated output voltage level in shunt regulator circuits |
| Power Dissipation (Ptot) | 400 mW - maximum continuous power handling at 25 °C ambient, limits usable current in regulation |
| Zener Test Current (IZT) | 100 µA - standardized measurement condition for VZ specification |
| Zener Impedance (ZZT) | 700 mΩ - determines voltage variation under changing load current |
| Maximum Leakage Current (IR) | 1 µA at 25.4 V - ensures minimal parasitic current draw in high-impedance bias networks |
| Package | SOD-123 - surface-mount, 2-terminal plastic case enabling compact PCB layout and automated assembly |
Pinout & Package
SOD-123 package: cathode-marked, 2-terminal surface-mount device with gull-wing leads. Dimensions: 2.7 mm × 1.7 mm × 1.2 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference node | Connected to lower potential side in shunt regulation; sets polarity for breakdown conduction |
| Cathode | Reference voltage output node | Provides stable 33 V output when reverse-biased; marked with band on package body |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±5% VZ enables accurate voltage clamping without external trimming |
| Low dynamic impedance | 700 mΩ at 1 mA improves regulation stability under load transients |
| Controlled leakage current | ≤1 µA at 25.4 V minimizes error in high-impedance feedback loops |
| SOD-123 footprint | Standardized 2.7 × 1.7 mm outline supports automated pick-and-place and reflow compatibility |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Regulating bias voltage for analog front-end op-amps in 4–20 mA loop-powered sensors. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 33 V rail for precision amplifier biasing. Use Value: Maintains signal integrity across temperature by limiting VCC drift to ±1.65 V over full operating range. | Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Standby overvoltage protector absorbing ESD and inductive spikes before they reach USB controller IC. Use Value: Limits peak voltage to ≤34.65 V (33 V + 5%) during 1 kV/500 Ω surge, protecting downstream PHY circuitry. |
| Programmable Logic Controller Input Protection | Low-Power IoT Node Voltage Reference |
Use Scenario: Protecting 24 V DC digital input channels against field-wiring faults and induced transients. IC Role / Device Role / Timing Role: Reverse-biased clamp limiting input voltage to safe levels for optocoupler or Schmitt-trigger input stages. Use Value: Withstands 100 ms overvoltage events up to 36 V without degradation, per IEC 61000-4-4 compliance testing. | Use Scenario: Providing stable reference for ADC conversion in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Low-current Zener reference supplying 100 µA bias to voltage divider network feeding SAR ADC reference pin. Use Value: Enables <1 LSB INL error over 0–70 °C due to predictable VZ drift of <0.05%/°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55-C33 (ON Semiconductor) | Same 33 V ±5%, but rated at 500 mW in DO-35 package; higher thermal mass but larger footprint | Preferred where board space allows and higher pulse energy absorption is needed | Select for legacy through-hole designs or higher surge immunity requirements |
| MMSZ5259B (Diodes Inc.) | 33 V ±5%, 500 mW, SOD-123 package; lower ZZT (500 mΩ) but higher IZT (45 mA) | Better regulation under higher current loads, but less suitable for ultra-low-IZ bias networks | Choose when operating near 1–5 mA and tighter dynamic regulation is critical |
Compared with BZX55-C33 and MMSZ5259B, PDZ33B/ZLX offers optimal balance of SOD-123 compactness, low-leakage operation at 100 µA, and adequate 400 mW dissipation for space-constrained, low-quiescent-current applications like sensor nodes and PLC inputs.
Availability
PDZ33B/ZLX is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB port protection, PLC input circuits, and low-power IoT node voltage references requiring stable component supply and long-term sourcing continuity.
Supply support for PDZ33B/ZLX 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 standard logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
PDZ33B/ZLX belongs to Nexperia's PDZ series of low-power Zener diodes, engineered for precision voltage reference and clamping in compact, cost-sensitive applications where SOD-123 mounting and tight tolerance are essential.
FAQ
What is the maximum continuous reverse current the PDZ33B/ZLX can handle without damage?
The PDZ33B/ZLX is rated for 400 mW total power dissipation at 25 °C ambient. At its nominal 33 V Zener voltage, this corresponds to a maximum continuous reverse current of approximately 12.1 mA. Derating is required above 25 °C per the datasheet's thermal resistance curve (RthJA = 375 K/W).
Does PDZ33B/ZLX have AEC-Q200 qualification for automotive use?
No, PDZ33B/ZLX is not AEC-Q200 qualified. It is designed for industrial and commercial applications. For automotive-grade Zener diodes, Nexperia offers the PZU series, which carries AEC-Q200 certification and extended temperature range support (–65 °C to +150 °C).
Can PDZ33B/ZLX be used in parallel for higher power handling?
No-Zener diodes should not be paralleled due to mismatched breakdown voltages causing current hogging. Even small VZ variations (±5%) result in unequal current sharing. For higher power, select a single higher-rated device such as the MMBZ5259B (500 mW) or use an active regulation solution.
What is the typical Zener voltage drift over temperature for PDZ33B/ZLX?
PDZ33B/ZLX exhibits a typical temperature coefficient of +0.05 %/°C near 33 V. This means VZ increases by ~16.5 mV per °C rise above 25 °C. The drift remains linear and predictable across –65 °C to +150 °C, supporting stable biasing in thermally varying environments.
PDZ33B/ZLX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PDZ-B
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PDZ33B/ZLX FAQ
1.How can I place an order for PDZ33B/ZLX through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ33B/ZLX 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 PDZ33B/ZLX reliable?
The price and inventory of PDZ33B/ZLX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ33B/ZLX is usually 5 days.
3.What payment methods are accepted for PDZ33B/ZLX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ33B/ZLX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ33B/ZLX?
PDZ33B/ZLX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ33B/ZLX 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 PDZ33B/ZLX?
For technical support, including PDZ33B/ZLX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ33B/ZLX requirements.
6.How does Aetrix verify that PDZ33B/ZLX is sourced from the original manufacturer or authorized distributors?
All PDZ33B/ZLX 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 PDZ33B/ZLX meets industry standards.
7.What is the process for return or replacement of PDZ33B/ZLX?
All PDZ33B/ZLX units undergo pre-shipment inspection (PSI). If there is an issue with PDZ33B/ZLX, 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 PDZ33B/ZLX part is unused and in its original packaging.
Return procedure for PDZ33B/ZLX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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