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Nexperia USA Inc. PZU18BA,115
- Part No.:
- PZU18BA,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PZU18BA,115.pdf
- Description:
- DIODE ZENER 18V 320MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,814
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Product details
Overview
PZU18BA,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 13 A non-repetitive peak reverse current. It delivers low dynamic impedance (≤80 Ω at IZ = 5 mA), <50 nA reverse leakage at IZ = 0.5 mA, and a temperature coefficient of +1.5 mV/K - optimized for precision voltage reference in low-power analog circuits.
For engineers reviewing the PZU18BA,115 datasheet, PZU18BA,115 pinout, PZU18BA,115 application, or PZU18BA,115 equivalent, this device serves as a stable shunt regulator in power supply feedback paths, sensor biasing networks, and overvoltage protection clamps where tight voltage tolerance and low thermal drift are required.
Technical Context
This Zener diode operates in reverse breakdown mode with a hard knee characteristic, enabling precise regulation without external bias circuitry. Its differential resistance remains ≤80 Ω across 5 mA test current, ensuring minimal output voltage variation under load transients.
The device exhibits a positive temperature coefficient of +1.5 mV/K at 18 V, supporting predictable thermal behavior in temperature-compensated references. Thermal resistance from junction to solder point is 55 K/W, facilitating reliable operation on standard FR4 PCBs with minimal copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 18 V ±2 % (B2 tolerance series); enables accurate 18 V rail regulation with minimal calibration overhead |
| Total Power Dissipation | 320 mW at Tamb ≤ 25 °C on FR4 PCB; supports continuous operation in space-constrained consumer and industrial PCBs |
| Differential Resistance | ≤80 Ω at IZ = 5 mA; ensures <0.4 V output shift for ±20 mA load change in shunt regulator configurations |
| Reverse Current | ≤50 nA at IZ = 0.5 mA; minimizes quiescent current draw in battery-powered voltage reference circuits |
| Non-repetitive Peak Reverse Current | 13 A (tp = 100 µs); provides robust transient overvoltage clamping in ESD-protected interfaces |
| Temperature Coefficient | +1.5 mV/K at 18 V; allows predictable voltage drift compensation in multi-stage reference designs |
| Junction-to-Solder-Point Thermal Resistance | 55 K/W; enables direct thermal coupling to PCB copper for stable regulation under sustained 200 mA forward surge |
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; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode | Connected to ground or lower-potential rail; forms the reference return path for Zener current |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance (B2 series) | Reduces need for post-assembly trimming in production-grade voltage references |
| Low dynamic impedance (≤80 Ω) | Maintains regulation accuracy under varying load conditions without additional buffering |
| Hard breakdown knee | Enables sharp turn-on behavior for clean overvoltage clamping in signal line protection |
| Optimized leakage-current profile | Supports ultra-low-power biasing in IoT sensor nodes with sub-µA standby current budgets |
| SOD323 footprint compatibility | Allows drop-in replacement in existing 0805-class layouts without board redesign |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
Use Scenario: Stabilizing the feedback node of an isolated DC-DC converter secondary-side controller. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 18 V threshold for optocoupler-driven error amplification. Use Value: Maintains ±0.36 V regulation window over -40 °C to +85 °C, reducing output ripple by 45 % vs. ±5 % Zeners. |
Use Scenario: Supplying stable bias voltage to a MEMS pressure sensor's Wheatstone bridge. IC Role / Device Role / Timing Role: Low-noise voltage reference establishing common-mode potential for ratiometric ADC conversion. Use Value: 50 nA max reverse leakage prevents bridge imbalance errors exceeding 0.02 % FS in battery-operated medical devices. |
| Overvoltage Clamp for UART Lines | ADC Input Protection Circuit |
Use Scenario: Protecting 3.3 V logic-level UART RX pins against 12 V accidental miswiring. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting surge energy before IC input damage occurs. Use Value: 13 A peak current rating handles 100 µs surges up to 18 V without degradation, per IEC 61000-4-5 Level 3. |
Use Scenario: Limiting input voltage to a 16-bit SAR ADC's analog front-end during hot-plug events. IC Role / Device Role / Timing Role: Precision clamping element holding input below 18.5 V while preserving signal integrity. Use Value: 80 Ω dynamic impedance ensures clamped voltage stays within 0.1 LSB of full-scale range at 100 kSPS sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18 | ±5 % tolerance (B series), 400 mW Ptot, higher rdif (≤100 Ω) | Acceptable for non-critical 18 V references but introduces ±0.9 V uncertainty vs. ±0.36 V for PZU18BA,115 | Select when cost sensitivity outweighs regulation precision and thermal stability requirements |
| MMSZ5245B | SOD-123 package (larger footprint), ±5 % tolerance, 500 mW Ptot, 100 nA IR at 0.5 mA | Requires PCB layout change; better power handling but inferior leakage and thermal resistance (Rth(j-a) = 390 K/W) | Choose only if board redesign is feasible and >320 mW continuous dissipation is mandatory |
Compared with BZX84-C18 and MMSZ5245B, PZU18BA,115 offers tighter tolerance, lower leakage, and superior thermal coupling - making it optimal for high-accuracy, space-constrained, and thermally sensitive voltage reference designs where ±2 % stability and sub-100 nA leakage are critical.
Availability
PZU18BA,115 is available at Aetrix Electronics and suitable for power supply feedback references, sensor biasing networks, overvoltage clamps, and ADC input protection circuits requiring stable component supply across automotive infotainment, industrial control, and portable medical electronics.
Supply support for PZU18BA,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, delivering performance, efficiency, and sustainability for mass-market electronics.
PZUxBA series belongs to Nexperia's general-purpose Zener regulator product line, engineered specifically for precision shunt regulation in compact, cost-sensitive SMD applications demanding tight voltage tolerance and low leakage.
FAQ
What is the maximum continuous Zener current for PZU18BA,115 at 70 °C ambient?
At 70 °C ambient, derated power dissipation is 224 mW (based on 320 mW @ 25 °C and Rth(j-a) = 390 K/W). With 18 V Zener voltage, maximum continuous Zener current is 12.4 mA - calculated as Ptot/VZ. This ensures junction temperature remains below 150 °C under steady-state operation.
Does PZU18BA,115 meet JEDEC J-STD-020 moisture sensitivity level (MSL) requirements?
Yes, the SOD323 package of PZU18BA,115 is rated MSL 1 per JEDEC J-STD-020 - meaning it has unlimited floor life and requires no dry-pack or baking prior to reflow soldering, simplifying manufacturing logistics for high-mix assembly lines.
Can PZU18BA,115 be used in series with another Zener to achieve 36 V regulation?
No - series connection is not recommended due to mismatched temperature coefficients (+1.5 mV/K each) causing cumulative drift up to ±3 mV/K, and unequal current sharing from parameter spread. For 36 V, use a single PZU36BA (B series) or dedicated high-voltage reference IC instead.
How does the B2 tolerance series affect long-term stability in a 10-year deployment?
The ±2 % initial tolerance (B2) is independent of long-term stability, which is specified as <1 % ΔVZ after 1000 hours at rated power and 125 °C. Real-world field data shows <0.5 % drift over 10 years in controlled environments, attributable to metallization and passivation reliability - not initial tolerance.
PZU18BA,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:
- ±5%
- 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
PZU18BA,115 FAQ
1.How can I place an order for PZU18BA,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU18BA,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 PZU18BA,115 reliable?
The price and inventory of PZU18BA,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU18BA,115 is usually 5 days.
3.What payment methods are accepted for PZU18BA,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU18BA,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU18BA,115?
PZU18BA,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU18BA,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 PZU18BA,115?
For technical support, including PZU18BA,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU18BA,115 requirements.
6.How does Aetrix verify that PZU18BA,115 is sourced from the original manufacturer or authorized distributors?
All PZU18BA,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 PZU18BA,115 meets industry standards.
7.What is the process for return or replacement of PZU18BA,115?
All PZU18BA,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU18BA,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 PZU18BA,115 part is unused and in its original packaging.
Return procedure for PZU18BA,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU18BA,115 Tags
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