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Nexperia USA Inc. PZU18B1A,115
- Part No.:
- PZU18B1A,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PZU18B1A,115.pdf
- Description:
- DIODE ZENER 18V 320MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,165
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Product details
Overview
PZU18B1A,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 sensor interfaces.
For engineers reviewing the PZU18B1A,115 datasheet, PZU18B1A,115 pinout, PZU18B1A,115 application, or PZU18B1A,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), thermal resistance to solder point (255 K/W), differential resistance at 5 mA, reverse leakage at sub-mA bias, and SOD323 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across a defined reverse-bias current range (0.5–20 mA). Its breakdown knee is engineered for hard transition with minimal voltage hysteresis, supporting accurate DC biasing in op-amp reference networks and ADC input protection circuits.
The ±2 % B1 tolerance grade ensures tighter regulation than standard ±5 % Zeners, while intentional minor leakage rise improves transient response during fast-switching events - a design trade-off documented in Nexperia Application Note AN90031 for noise-sensitive signal conditioning paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (nominal) | 18 V - precise clamping threshold for 18 V rail supervision or analog front-end reference |
| Tolerance | ±2 % (B1 series) - enables tighter voltage margin control vs. ±5 % alternatives in feedback loops |
| rdif max | 80 Ω at IZ = 5 mA - low dynamic impedance ensures minimal voltage shift under load variation |
| IR | ≤20 nA at IZ = 0.5 mA - ultra-low leakage preserves battery life in always-on monitoring circuits |
| Ptot | 320 mW at Tamb ≤ 25 °C - defines maximum continuous power handling on FR4 PCB with standard footprint |
| PZSM | 40 W (100 µs square wave) - supports transient surge suppression without failure |
| SZ | +1.5 mV/K - positive tempco allows predictable drift compensation in temperature-stable references |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic case measuring 1.7 mm × 1.25 mm × 0.95 mm, with 1.3 mm lead pitch and cathode-marked top-side bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated voltage node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode | Connected to ground or lower-potential reference; forms current path during reverse breakdown |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance (B1) | Enables tighter regulation in feedback networks where 5 % error would degrade system accuracy |
| Hard breakdown knee | Minimizes voltage hysteresis during turn-on/turn-off cycles, critical for repeatable threshold detection |
| Optimized leakage for switching | Intentionally elevated IR improves transient response and reduces broadband noise in signal-path clamping |
| Low thermal resistance to solder point | Rth(j-sp) = 255 K/W - enhances heat transfer to PCB copper, improving reliability under pulsed loads |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 24-bit sigma-delta ADCs in temperature and pressure transmitters. IC Role / Device Role / Timing Role: Shunt regulator providing clean 18 V reference to op-amp bias network and ADC voltage reference buffer. Use Value: ±2 % tolerance and <80 Ω rdif ensure reference stability within 0.36 V across operating temperature, preserving ENOB. |
Use Scenario: Overvoltage protection on CC line and VCONN supply in USB-C receptacles. IC Role / Device Role / Timing Role: Fast-acting clamp limiting transient spikes to 18.4 V before they reach USB PD controller ICs. Use Value: 40 W non-repetitive surge rating and hard knee enable sub-100 ns response to ESD events per IEC 61000-4-2 Level 4. |
| Low-Power IoT Node Voltage Reference | Automotive Body Control Module (Non-Automotive Qualified) |
|
Use Scenario: Providing stable bias for RF front-end LNA and microcontroller reset supervisor in battery-powered asset trackers. IC Role / Device Role / Timing Role: Low-leakage (≤20 nA) Zener establishing 18 V rail for PMIC enable sequencing and analog sensor excitation. Use Value: Ultra-low IR extends shelf life and operational runtime by minimizing quiescent current drain in sleep mode. |
Use Scenario: Clamping CAN transceiver supply rails against load-dump transients in aftermarket diagnostic tools. IC Role / Device Role / Timing Role: Secondary overvoltage clamp supplementing primary TVS, absorbing residual energy after main suppression. Use Value: 320 mW steady-state dissipation and SOD323 footprint allow integration into space-constrained diagnostic dongles without heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18,215 | ±5 % tolerance, higher rdif (100 Ω), 250 mW Ptot, same SOD323 package | Lower cost but reduced regulation accuracy; unsuitable for precision reference use | Select when budget constraints outweigh voltage stability requirements in non-critical clamping |
| MMSZ5245B-7-F | ±5 % tolerance, 500 mW Ptot, SOD-123 package (larger footprint), 30 Ω rdif | Higher power handling but incompatible with SOD323 layout; better for higher-current biasing | Choose only if board redesign permits larger footprint and >320 mW continuous dissipation is required |
Compared with PZU18B1A,115, BZX84-C18,215 sacrifices regulation precision for cost, while MMSZ5245B-7-F trades miniaturization for thermal headroom - making the PZU18B1A,115 optimal for space-constrained, accuracy-critical 18 V reference designs.
Availability
PZU18B1A,115 is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB-C interface protection, low-power IoT voltage reference, and aftermarket automotive diagnostic clamping requiring stable component supply and guaranteed traceability.
Supply support for PZU18B1A,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 advanced packaging and automotive-qualified components.
The PZUxBA series belongs to Nexperia's general-purpose Zener regulator product line, designed specifically for compact, high-accuracy voltage reference and clamping in consumer, industrial, and communications equipment where SMD miniaturization and tight tolerance are essential.
FAQ
What is the maximum continuous reverse current for reliable operation?
The PZU18B1A,115 is rated for up to 20 mA DC reverse current under derated conditions. At 25 °C ambient on FR4 PCB, sustained operation above 15 mA requires thermal verification due to its 320 mW Ptot limit and 255 K/W Rth(j-sp). Pulse operation up to 200 mA is permitted per absolute maximum ratings, but only for durations ≤300 µs.
Does the +1.5 mV/K temperature coefficient improve or degrade regulation stability?
The +1.5 mV/K coefficient means VZ increases by 1.5 mV per Kelvin rise in junction temperature. This is beneficial when paired with negative-tempco components (e.g., certain resistors or op-amps) to achieve net zero-drift reference designs. In standalone use, it introduces predictable, linear drift - not degradation - enabling software compensation in digital systems.
Can PZU18B1A,115 replace PZU18BA in an existing design?
Yes, with improved performance: PZU18B1A,115 offers ±2 % tolerance versus ±5 % for PZU18BA, identical SOD323 package and pinout, and matching electrical limits. No layout or schematic changes are needed; the tighter tolerance directly enhances voltage accuracy in all applications without altering bill-of-materials or firmware.
Is this device suitable for automotive applications?
No. The PZU18B1A,115 is not AEC-Q200 qualified and lacks automotive-grade screening, temperature cycling validation, or extended lifetime testing. Nexperia explicitly states non-automotive qualification in its legal disclaimers. For automotive body electronics, use only parts designated as automotive-qualified in official Nexperia documentation.
PZU18B1A,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
PZU18B1A,115 FAQ
1.How can I place an order for PZU18B1A,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU18B1A,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 PZU18B1A,115 reliable?
The price and inventory of PZU18B1A,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU18B1A,115 is usually 5 days.
3.What payment methods are accepted for PZU18B1A,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU18B1A,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU18B1A,115?
PZU18B1A,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU18B1A,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 PZU18B1A,115?
For technical support, including PZU18B1A,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU18B1A,115 requirements.
6.How does Aetrix verify that PZU18B1A,115 is sourced from the original manufacturer or authorized distributors?
All PZU18B1A,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 PZU18B1A,115 meets industry standards.
7.What is the process for return or replacement of PZU18B1A,115?
All PZU18B1A,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU18B1A,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 PZU18B1A,115 part is unused and in its original packaging.
Return procedure for PZU18B1A,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU18B1A,115 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
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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
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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