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Nexperia USA Inc. PZU33BA,115
- Part No.:
- PZU33BA,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PZU33BA,115.pdf
- Description:
- DIODE ZENER 33V 320MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:17
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Product details
Overview
PZU33BA,115 from Nexperia is a general-purpose Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and overvoltage protection in low-power analog and digital circuits. It delivers a nominal 33 V Zener voltage with ±5 % tolerance (B-series), 250 Ω maximum differential resistance at IZ = 5 mA, reverse current ≤40 nA at IZ = 0.5 mA, and operates across –55 °C to +150 °C ambient temperature.
For engineers reviewing the PZU33BA,115 datasheet, PZU33BA,115 pinout, PZU33BA,115 application, or PZU33BA,115 equivalent, key selection criteria include its 33 V regulation accuracy, low leakage performance at sub-mA bias, thermal resistance of 255 K/W (junction-to-solder point), and suitability for space-constrained SMT designs requiring stable DC reference or transient clamping.
Technical Context
This Zener diode operates in reverse breakdown mode with a hard knee characteristic optimized for stable regulation under low-current conditions (IZ = 0.5–5 mA). Its temperature coefficient is +0.9 mV/K at 33 V, enabling predictable drift behavior in temperature-varying environments.
The device uses planar epitaxial construction for consistent parametric spread and supports non-repetitive surge handling up to 40 W (tp = 100 µs), making it suitable for ESD and transient suppression in conjunction with series impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 33 V nominal, ±5 % tolerance - defines precise DC reference level for feedback or clamp circuits |
| Differential Resistance rdif | ≤250 Ω at IZ = 5 mA - ensures minimal output voltage shift under load variation |
| Reverse Current IR | ≤40 nA at IZ = 0.5 mA - enables ultra-low quiescent power consumption in battery-sensitive designs |
| Total Power Dissipation Ptot | 320 mW at Tamb ≤ 25 °C on FR4 PCB - sets continuous thermal limit for PCB layout and copper area planning |
| Junction Temperature Tj | 150 °C maximum - determines safe operating margin when derating for elevated ambient or power dissipation |
| Thermal Resistance Rth(j-sp) | 255 K/W - quantifies thermal path efficiency from junction to cathode solder point for thermal modeling |
| Non-repetitive Peak Power PZSM | 40 W for 100 µs square wave - defines single-event surge capability for transient suppression applications |
Pinout & Package
SOD323 (SC-76) plastic surface-mount package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; polarity marker (bar) aligns with this terminal for correct PCB orientation |
| 2 | Anode | Connected to ground or lower-potential rail; forms reverse-biased junction during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low leakage current | IR ≤ 40 nA at 0.5 mA - minimizes standby current in always-on voltage monitoring circuits |
| Hard breakdown knee | Sharp Zener transition at 33 V - improves regulation stability and reduces sensitivity to bias current variation |
| High surge robustness | 40 W non-repetitive peak power - supports transient clamping without degradation in short-duration overvoltage events |
| Wide operating temperature | –55 °C to +150 °C ambient - enables use in industrial and automotive under-hood environments |
| Small footprint | SOD323 package (1.7 × 1.25 mm) - fits high-density layouts where board space is constrained |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
|
Use Scenario: Providing stable 33 V reference for ADC voltage dividers or op-amp bias networks in industrial sensor signal conditioning. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to maintain fixed reference potential independent of supply ripple. Use Value: Enables <±0.5 % measurement accuracy by minimizing reference drift under varying load and temperature. |
Use Scenario: Clamping input voltage to 33 V in microcontroller GPIO protection circuits exposed to 36 V industrial bus transients. IC Role / Device Role / Timing Role: Fast-acting shunt element that conducts excess energy to ground when input exceeds 33 V + tolerance. Use Value: Limits peak stress on downstream ICs to <35 V while surviving 40 W surges per IEC 61000-4-5 Level 3 testing. |
| Temperature-Stable Biasing | Low-Power Voltage Monitoring |
|
Use Scenario: Generating temperature-compensated bias current for precision current sources in analog front-ends. IC Role / Device Role / Timing Role: Zener reference with +0.9 mV/K coefficient used in conjunction with complementary NTC/PTC elements. Use Value: Achieves <±20 ppm/°C total drift over –40 °C to +85 °C when paired with matched resistors. |
Use Scenario: Detecting brown-out conditions in coin-cell-powered IoT nodes using comparator input referenced to 33 V Zener. IC Role / Device Role / Timing Role: Ultra-low-leakage (40 nA) voltage reference enabling >10-year battery life in sleep-mode monitoring. Use Value: Reduces quiescent current by 90 % compared to standard 33 V references, extending shelf life significantly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B33,115 | Same 33 V ±5 %, but higher typical leakage (100 nA at 0.5 mA) and 300 mW Ptot | Less suitable for ultra-low-power monitoring; acceptable for general-purpose regulation | Select when cost priority outweighs leakage sensitivity and thermal margin is adequate |
| MMSZ5257ET1G | 33 V ±5 %, SOD-123 package (larger), 500 mW Ptot, 100 nA IR at 1 mA | Better thermal dissipation but incompatible footprint; requires PCB redesign | Choose only if higher continuous power handling is required and re-layout is feasible |
Compared with BZX384-B33,115 and MMSZ5257ET1G, PZU33BA,115 offers the lowest leakage (40 nA), smallest footprint (SOD323), and optimal thermal resistance (255 K/W to solder point), making it preferred for miniaturized, battery-critical, and thermally constrained designs.
Availability
PZU33BA,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical monitors, and automotive body control modules requiring stable component supply with tight Zener voltage tolerance and low leakage performance.
Supply support for PZU33BA,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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The PZUxBA series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for compact, low-leakage voltage regulation and transient suppression in consumer, industrial, and automotive-qualified (non-automotive grade unless specified) applications.
FAQ
What is the maximum continuous reverse current the PZU33BA,115 can sustain without exceeding its 320 mW power rating?
At 33 V Zener voltage and 320 mW total dissipation, the maximum continuous reverse current is approximately 9.7 mA (320 mW ÷ 33 V). This assumes ambient temperature ≤25 °C on a standard FR4 PCB with single-sided copper; derating is required above 25 °C per the 255 K/W junction-to-solder-point thermal resistance.
How does the +0.9 mV/K temperature coefficient affect regulation accuracy over –40 °C to +125 °C?
Over that 165 °C range, the total Zener voltage drift is +148.5 mV (165 × 0.9 mV/K), resulting in a 33.1485 V maximum at +125 °C. Combined with ±5 % initial tolerance (±1.65 V), worst-case regulation spans 31.35 V to 34.80 V - critical for precision reference applications requiring tighter drift budgets.
Can PZU33BA,115 be used in parallel for higher power handling?
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. Parallel operation risks thermal runaway and premature failure; external ballast resistors or dedicated regulators are required for increased power capability.
Is the SOD323 package compatible with standard reflow profiles for lead-free assembly?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The SOD323 outline supports peak temperatures up to 260 °C for ≤30 seconds; recommended solder land pattern matches Figure 10 in the datasheet (0.6 mm × 0.5 mm pads, 1.35 mm center-to-center).
PZU33BA,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 320 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:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PZU33BA,115 FAQ
1.How can I place an order for PZU33BA,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU33BA,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 PZU33BA,115 reliable?
The price and inventory of PZU33BA,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU33BA,115 is usually 5 days.
3.What payment methods are accepted for PZU33BA,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU33BA,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU33BA,115?
PZU33BA,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU33BA,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 PZU33BA,115?
For technical support, including PZU33BA,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU33BA,115 requirements.
6.How does Aetrix verify that PZU33BA,115 is sourced from the original manufacturer or authorized distributors?
All PZU33BA,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 PZU33BA,115 meets industry standards.
7.What is the process for return or replacement of PZU33BA,115?
All PZU33BA,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU33BA,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 PZU33BA,115 part is unused and in its original packaging.
Return procedure for PZU33BA,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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