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Nexperia USA Inc. PDZ33B,115
- Part No.:
- PDZ33B,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ33B,115.pdf
- Description:
- DIODE ZENER 33V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,873
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Product details
Overview
PDZ33B,115 from Nexperia is a single silicon Zener diode designed for low-power voltage regulation in space-constrained SMD applications, with a nominal Zener voltage of 33 V at 5 mA, ±2 % tolerance, 250 Ω maximum differential resistance at 0.5 mA, 0.05 μA maximum reverse leakage at 25 V, and 400 mW total power dissipation on FR4 PCB.
For engineers reviewing the PDZ33B,115 datasheet, PDZ33B,115 pinout, PDZ33B,115 application, or PDZ33B,115 equivalent, this device is selected for precision clamping, reference voltage generation, and overvoltage protection where tight voltage stability, low thermal drift (29.7 mV/K), and SOD323 footprint compatibility are critical.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable DC voltage across its terminals under varying load or supply conditions. Its hard breakdown knee and low dynamic impedance ensure predictable regulation even at low bias currents (IZ = 0.5 mA).
Thermal performance is defined by junction-to-solder-point resistance of 130 K/W and junction-to-ambient resistance of 340 K/W on standard FR4 PCB, enabling reliable operation up to +150 °C junction temperature with appropriate derating above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 32.15 V to 33.79 V at IZ = 5 mA - defines precise clamping threshold for 33 V nominal systems |
| Differential Resistance (rdif) | ≤250 Ω at IZ = 0.5 mA - ensures minimal voltage shift under small current variations |
| Reverse Leakage (IR) | ≤0.05 μA at VR = 25 V - enables ultra-low standby power loss in battery-backed circuits |
| Temperature Coefficient (SZ) | +25.0 to +29.7 mV/K - supports stable regulation across industrial temperature range with known linear drift |
| Total Power Dissipation (Ptot) | 400 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous power handling before thermal derating applies |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - confirms low-loss forward conduction when used bidirectionally or in protection paths |
| Junction Temperature (Tj) | −65 °C to +150 °C - validates suitability for extended-temperature industrial environments |
Pinout & Package
PDZ33B,115 is housed in a SOD323 (SC-76) surface-mount plastic package measuring 1.8 mm × 1.35 mm × 0.95 mm, with cathode indicated by a marking bar on the device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD package | SOD323 footprint enables high-density PCB layouts without through-hole mounting |
| Hard breakdown knee | Sharp, well-defined Zener transition improves regulation accuracy at low currents |
| ±2 % voltage tolerance | Reduces need for post-production trimming in precision reference designs |
| Very low leakage current | 0.05 μA max at 25 V supports energy-sensitive applications like IoT sensors |
| Stable temperature coefficient | +29.7 mV/K allows predictable compensation in temperature-varying environments |
Applications
| Power Supply Clamping | Reference Voltage Generation |
|---|---|
|
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage during hot-plug events in 24–36 V industrial control modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp input voltage to ≤33.8 V. Use Value: Prevents latch-up or permanent damage using only 0.9 mm² board area and no external bias components. |
Use Scenario: Providing a stable 33 V reference for analog-to-digital converter (ADC) full-scale calibration in test equipment. IC Role / Device Role / Timing Role: Precision shunt reference delivering fixed voltage independent of load current up to 5 mA. Use Value: Achieves <±0.5 % total error over 0–70 °C due to known +29.7 mV/K drift and low rdif. |
| Overvoltage Protection | Signal Level Translation |
|
Use Scenario: Safeguarding CAN transceiver power rails against load-dump spikes in automotive body electronics (non-automotive qualified but used in subsystems). IC Role / Device Role / Timing Role: Fast-acting shunt limiter triggered above 33.8 V, diverting surge current to ground. Use Value: Absorbs 0.9 A non-repetitive peak reverse current (tp = 100 μs) without failure. |
Use Scenario: Shifting logic-level signals between 3.3 V and 33 V domains in programmable logic interface boards. IC Role / Device Role / Timing Role: Bidirectional clamp limiting negative swing to −0.9 V and positive swing to +33.8 V. Use Value: Enables robust level translation with <1 ns response time and no active circuitry required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B33,115 | Same SOD323 package; tighter ±1 % tolerance; higher Ptot = 300 mW (not 400 mW); 200 Ω rdif at 5 mA | Better initial accuracy but lower power headroom; less suitable for sustained 33 V/10 mA loads | Select when absolute voltage precision outweighs power margin requirements |
| MMBZ5265B-7-F | SOT-23 package; ±5 % tolerance; 200 mW Ptot; 700 Ω rdif at 20 mA; different thermal resistance | Larger footprint; looser tolerance; higher impedance limits low-current regulation fidelity | Choose only if SOT-23 is mandated by legacy layout or assembly constraints |
Compared with BZX384-B33,115 and MMBZ5265B-7-F, PDZ33B,115 offers the highest power rating (400 mW) and lowest differential resistance (250 Ω) in SOD323, making it optimal for thermally constrained, medium-current regulation where stability at low bias matters.
Availability
PDZ33B,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic I/O protection, and test equipment reference circuits requiring stable component supply and long-term obsolescence management.
Supply support for PDZ33B,115 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, with leadership in automotive-qualified and industrial-grade components.
PDZ33B,115 belongs to the PDZ-B series of low-power Zener diodes engineered for general-purpose voltage regulation in compact SMD designs-prioritizing tight tolerance, low leakage, and consistent breakdown behavior across temperature.
FAQ
What is the maximum reverse current the PDZ33B,115 can handle during transient events?
The PDZ33B,115 supports a non-repetitive peak reverse current (IZSM) of 0.9 A for 100 µs square-wave pulses at 25 °C ambient, verified per IEC 60134 limiting values. This capability enables effective clamping of short-duration surges without degradation, provided thermal recovery time between events is observed.
How does the temperature coefficient affect regulation accuracy over −40 °C to +85 °C?
With a specified temperature coefficient of +29.7 mV/K, the Zener voltage shifts approximately +1.8 V across a 60 K span (e.g., −40 °C to +20 °C). For applications demanding tighter stability, this drift must be compensated in system-level calibration or mitigated via thermal management-no internal compensation is provided.
Can PDZ33B,115 be used in parallel for higher power dissipation?
No-Zener diodes exhibit manufacturing spread in breakdown voltage, causing current hogging when paralleled. Even matched units risk thermal runaway due to positive temperature coefficient above ~5 V. For >400 mW needs, use a single higher-rated device or an active regulator instead.
Is the SOD323 footprint compatible with automated reflow soldering processes?
Yes-the device follows JEDEC SC-76 standards and Nexperia's recommended reflow footprint (Fig. 9), with 0.5 mm pad width, 1.65 mm pad length, and 2.2 mm center-to-center spacing. Compatible with standard lead-free reflow profiles (peak 260 °C, 30 s above 217 °C) when using appropriate stencil design.
PDZ33B,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PDZ-B
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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,115 FAQ
1.How can I place an order for PDZ33B,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ33B,115 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,115 reliable?
The price and inventory of PDZ33B,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ33B,115 is usually 5 days.
3.What payment methods are accepted for PDZ33B,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ33B,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ33B,115?
PDZ33B,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ33B,115 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,115?
For technical support, including PDZ33B,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ33B,115 requirements.
6.How does Aetrix verify that PDZ33B,115 is sourced from the original manufacturer or authorized distributors?
All PDZ33B,115 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,115 meets industry standards.
7.What is the process for return or replacement of PDZ33B,115?
All PDZ33B,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDZ33B,115, 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,115 part is unused and in its original packaging.
Return procedure for PDZ33B,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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