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Nexperia USA Inc. PZU18B2A,115
- Part No.:
- PZU18B2A,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PZU18B2A,115.pdf
- Description:
- DIODE ZENER 18V 320MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
PZU18B2A,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 18 V nominal working voltage, 320 mW total power dissipation at 25 °C ambient, and 40 W non-repetitive peak reverse power. It delivers low dynamic impedance (≤80 Ω at IZ = 5 mA), reverse current ≤20 nA at IZ = 0.5 mA, and temperature coefficient of +1.5 mV/K - used for precision voltage reference and overvoltage clamping in low-power analog supply rails.
For engineers reviewing the PZU18B2A,115 datasheet, PZU18B2A,115 pinout, PZU18B2A,115 application, or PZU18B2A,115 equivalent, this device is selected for stable 18 V regulation under low-current bias (e.g., 5 mA), where tight tolerance, low leakage, and predictable thermal drift are critical in sensor front-ends and MCU reset circuits.
Technical Context
This Zener diode operates in reverse breakdown with hard knee characteristics optimized for fast switching and noise reduction per AN90031. Its differential resistance remains ≤80 Ω at 5 mA test current, enabling stable regulation under varying load conditions in compact DC-DC feedback networks.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it exhibits Rth(j-a) = 390 K/W in free air and Rth(j-sp) = 55 K/W to solder point - confirming thermal performance suitability for thermally constrained consumer and industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 18 V ±2 % - ensures precise 18 V reference within 360 mV tolerance at IZ = 5 mA |
| Differential Resistance | ≤80 Ω at IZ = 5 mA - minimizes output voltage shift under small load variations |
| Reverse Current | ≤20 nA at IZ = 0.5 mA - enables ultra-low quiescent current biasing in battery-powered systems |
| Temperature Coefficient | +1.5 mV/K - provides predictable, positive drift for compensation in mixed-signal references |
| Total Power Dissipation | 320 mW at Tamb ≤ 25 °C on standard FR4 - defines maximum continuous DC power handling |
| Non-repetitive Peak Power | 40 W for tp = 100 µs - supports transient surge suppression without degradation |
| Junction Temperature | 150 °C max - sets upper thermal limit for reliable long-term operation |
Pinout & Package
Package: SOD323 (SC-76), plastic surface-mounted, 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode | Connected to ground or lower-potential rail; completes reverse-bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Tolerance grade B2 | ±2 % Zener voltage accuracy - reduces calibration overhead in precision analog signal chains |
| Optimized leakage profile | Intentional minor rise in IR vs. standard variants - improves switching speed and reduces broadband noise per AN90031 |
| Low dynamic impedance | ≤80 Ω at 5 mA - maintains regulation stability across ±1 mA load changes in feedback loops |
| Hard breakdown knee | Sharp, well-defined reverse conduction onset - avoids ambiguous transition regions in clamp applications |
| SOD323 footprint compatibility | Standardized 1.3 mm pitch, 1.7×1.25 mm outline - ensures drop-in replacement on high-density PCBs |
Applications
| Power Supply Reference | Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 18 V reference for ADC voltage reference buffers in portable instrumentation. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to generate fixed 18 V rail independent of input variation. Use Value: ±2 % tolerance and +1.5 mV/K TC enable <100 ppm/°C reference drift over 0–70 °C, meeting 12-bit ADC accuracy requirements. |
Use Scenario: Biasing photodiode transimpedance amplifier input stage with low-noise 18 V supply. IC Role / Device Role / Timing Role: Low-leakage Zener regulating op-amp V+ rail to minimize input offset drift and dark current error. Use Value: ≤20 nA reverse current at 0.5 mA ensures <2 µV input-referred offset contribution from supply coupling in high-gain stages. |
| Microcontroller Reset Circuit | Overvoltage Clamp |
Use Scenario: Generating clean 18 V threshold for external reset supervisor IC monitoring main system rail. IC Role / Device Role / Timing Role: Precision Zener defining exact reset assertion voltage in conjunction with comparator hysteresis. Use Value: Hard breakdown knee and ≤80 Ω dynamic impedance ensure repeatable, jitter-free reset activation at exactly 18.0 V ±0.36 V. |
Use Scenario: Clamping transient spikes on 15 V analog bus lines exposed to ESD or inductive kickback. IC Role / Device Role / Timing Role: Fast-switching Zener absorbing surge energy up to 40 W for 100 µs without failure. Use Value: Optimized leakage profile enables sub-10 ns response to overvoltage events while maintaining low steady-state power loss. |
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-B18,115 | Same SOD323 package, ±2 % tolerance, but higher typical IR (50 nA @ 0.5 mA) and rdif = 90 Ω | Less suitable for ultra-low-leakage sensor biasing; acceptable for general-purpose clamping | Select when cost sensitivity outweighs leakage-critical performance |
| MMSZ5245B-7-F | SOD-123 package, ±5 % tolerance, 18 V nominal, rdif = 23 Ω, but IR = 100 nA @ 0.5 mA | Larger footprint and looser tolerance limit use in precision references; better for high-current shunt regulation | Choose only if board space allows SOD-123 and ±5 % tolerance is acceptable |
Compared with BZX384-B18,115 and MMSZ5245B-7-F, PZU18B2A,115 offers the lowest leakage (≤20 nA) and tightest tolerance (±2 %) in the smallest footprint (SOD323), making it optimal for space-constrained, low-drift analog designs - whereas alternatives trade leakage or accuracy for cost or current-handling capability.
Availability
PZU18B2A,115 is available at Aetrix Electronics and suitable for precision voltage reference, sensor biasing, microcontroller reset supervision, and transient overvoltage clamping requiring stable component supply across production lifecycles.
Supply support for PZU18B2A,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 delivering high-performance, reliable discrete, logic, and MOSFET solutions with focus on efficiency, miniaturization, and robustness.
The PZUxBA series targets general-purpose and precision Zener regulation in ultra-compact SMD formats, specifically engineered for low-leakage, low-impedance, and thermally stable operation in space- and power-sensitive applications.
FAQ
What is the maximum continuous reverse current the PZU18B2A,115 can sustain?
The device has no specified maximum continuous reverse current rating; instead, its safe operating area is defined by total power dissipation (320 mW at 25 °C ambient on FR4). At 18 V Zener voltage, this corresponds to ~17.8 mA average reverse current under ideal thermal conditions - actual usable current depends on PCB copper area and ambient temperature.
Does PZU18B2A,115 meet automotive AEC-Q200 requirements?
No. The PZU18B2A,115 is not AEC-Q200 qualified. Nexperia explicitly states in the legal disclaimers that unless otherwise stated in the data sheet, products are non-automotive qualified and not tested to automotive reliability or temperature standards.
How does the B2 tolerance grade differ from B1 or B3 in the PZUxBA series?
B2 denotes ±2 % tolerance with a min/max range of 17.64 V to 18.36 V at IZ = 5 mA. B1 offers tighter control (±2 % with narrower binning), while B3 applies to higher-voltage types (≥39 V); B2 is the standard ±2 % grade for mid-range voltages like 18 V.
Can PZU18B2A,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, slight VZ mismatches cause current hogging. Parallel operation is not recommended - use a single higher-power device or active regulation instead.
PZU18B2A,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):
- 18 V
- Tolerance:
- ±2%
- Power - Max:
- 320 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:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PZU18B2A,115 FAQ
1.How can I place an order for PZU18B2A,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU18B2A,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 PZU18B2A,115 reliable?
The price and inventory of PZU18B2A,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU18B2A,115 is usually 5 days.
3.What payment methods are accepted for PZU18B2A,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU18B2A,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU18B2A,115?
PZU18B2A,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU18B2A,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 PZU18B2A,115?
For technical support, including PZU18B2A,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU18B2A,115 requirements.
6.How does Aetrix verify that PZU18B2A,115 is sourced from the original manufacturer or authorized distributors?
All PZU18B2A,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 PZU18B2A,115 meets industry standards.
7.What is the process for return or replacement of PZU18B2A,115?
All PZU18B2A,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU18B2A,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 PZU18B2A,115 part is unused and in its original packaging.
Return procedure for PZU18B2A,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU18B2A,115 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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