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NXP Semiconductors PZU18B3,115
- Part No.:
- PZU18B3,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
PZU18B3,115.pdf
- Description:
- DIODE ZENER 18V 310MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:60,470
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Product details
Overview
PZU18B3,115 from NXP Semiconductors is a precision Zener diode in SOD323F (SC-90) package, designed for voltage regulation and reference functions at 18 V nominal Zener voltage with ±2 % tolerance, 80 Ω maximum differential resistance, and 50 nA reverse current at 14.4 V. It delivers stable regulation in compact power management circuits including LDO bias networks and sensor supply rails.
For engineers reviewing the PZU18B3,115 datasheet, PZU18B3,115 pinout, PZU18B3,115 application, or PZU18B3,115 equivalent, key selection criteria include Zener voltage accuracy, thermal coefficient (13 mV/K), low capacitance (93 pF), and SOD323F footprint compatibility with high-density PCB layouts.
Technical Context
The PZU18B3,115 operates as a single-terminal voltage reference device with cathode-anode polarity defined by a marking bar. Its Zener breakdown mechanism provides stable reverse-bias regulation at IZ = 5 mA, with temperature coefficient of +13 mV/K ensuring predictable drift over −65 °C to +150 °C ambient range.
Thermal performance is characterized by Rth(j-a) = 230 K/W on FR4 PCB with standard footprint and Rth(j-sp) = 55 K/W to solder point, supporting reliable operation up to 150 °C junction temperature. Non-repetitive peak reverse power dissipation reaches 40 W under 100 μs surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 16.94 V to 19.03 V at IZ = 5 mA - defines tight regulation window for precision 18 V reference |
| Tolerance | ±2 % (B3 grade) - enables high-accuracy feedback loops without external trimming |
| Differential Resistance rdif | ≤80 Ω - ensures minimal output impedance shift across operating current range |
| Reverse Current IR | ≤50 nA at VR = 14.4 V - guarantees low leakage in battery-backed or ultra-low-power circuits |
| Temperature Coefficient SZ | +13 mV/K at IZ = 5 mA - quantifies predictable positive drift for thermal compensation design |
| Capacitance Cd | 93 pF at f = 1 MHz, VR = 0 V - supports stable AC performance in noise-sensitive analog references |
| Total Power Dissipation | 310 mW at Tamb ≤25 °C - sets continuous DC power limit for thermal layout planning |
Pinout & Package
SOD323F (SC-90) plastic surface-mounted package: 2.7 mm × 1.6 mm body, 0.65 mm pitch, 0.25 mm profile; 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 reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance (B3 grade) | Enables direct replacement in 18 V reference designs without calibration adjustment |
| Low 50 nA reverse leakage at 14.4 V | Maintains regulation integrity in standby modes and extends battery life in portable systems |
| 93 pF junction capacitance | Minimizes high-frequency noise coupling into reference nodes for ADC and comparator circuits |
| 150 °C maximum junction temperature | Supports operation in automotive engine control units and industrial motor drive environments |
| SOD323F ultra-small footprint | Reduces PCB area by >50 % vs. SOD123, enabling placement near IC power pins for local decoupling |
Applications
| Power Supply Reference | Sensor Biasing |
|---|---|
Use Scenario: Providing stable 18 V reference for adjustable switching regulator feedback divider. IC Role / Device Role / Timing Role: Zener diode acting as precision voltage clamp defining upper regulation threshold. Use Value: Tight ±2 % tolerance eliminates need for resistor trimming, reducing BOM count and calibration steps. |
Use Scenario: Biasing bridge-based pressure sensors requiring stable excitation voltage. IC Role / Device Role / Timing Role: Voltage reference source delivering low-noise, low-drift excitation. Use Value: 13 mV/K temperature coefficient allows predictable compensation in sensor signal conditioning. |
| Microcontroller Reset Circuit | Overvoltage Protection Clamp |
Use Scenario: Generating clean reset signal when main 18 V rail exceeds safe threshold. IC Role / Device Role / Timing Role: Reverse-biased Zener clamping rail voltage to trigger reset IC input. Use Value: 80 Ω differential resistance ensures fast response to overvoltage transients without oscillation. |
Use Scenario: Protecting analog front-end inputs from ESD-induced voltage spikes. IC Role / Device Role / Timing Role: Transient voltage suppressor shunting excess energy to ground. Use Value: 40 W non-repetitive peak power rating handles IEC 61000-4-2 Level 4 ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18,115 | Same SOD323F package, ±5 % tolerance (B grade), higher 200 nA IR at 14.4 V | Lower accuracy and higher leakage reduce suitability for precision references | Select when cost sensitivity outweighs voltage accuracy requirements |
| MMSZ5245B-TP | SOD123 package (3.7 × 1.6 mm), ±5 % tolerance, 100 nA IR at 14.4 V, 100 Ω rdif | Larger footprint and higher impedance limit use in space-constrained or low-noise designs | Choose only if existing layout accommodates SOD123 and ±5 % tolerance is acceptable |
Compared with BZX84-C18,115 and MMSZ5245B-TP, the PZU18B3,115 offers superior voltage accuracy (±2 % vs. ±5 %), lower leakage (50 nA vs. ≥100 nA), and tighter dynamic impedance (80 Ω vs. ≥100 Ω), making it optimal for high-stability reference and low-power sensing applications where board space is constrained.
Availability
PZU18B3,115 is available at Aetrix Electronics and suitable for voltage reference design, sensor excitation circuits, and overvoltage protection requiring stable component supply across automotive, industrial, and medical electronics programs.
Supply support for PZU18B3,115 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The PZUxB series was developed to deliver high-precision, low-profile Zener diodes for space-constrained voltage regulation in automotive ECUs, industrial PLCs, and portable instrumentation.
FAQ
What is the exact Zener voltage range for PZU18B3,115 at 5 mA test current?
The PZU18B3,115 has a guaranteed Zener voltage range of 16.94 V to 19.03 V when measured at IZ = 5 mA and Tj = 25 °C. This 2.09 V span reflects its ±2 % B3 tolerance grade and is verified per NXP's PZUxB series product data sheet Rev. 02. The PZU18B3,115 maintains this specification across its full operating temperature range.
Does PZU18B3,115 support reflow soldering only, or can it be hand-soldered?
The PZU18B3,115 is qualified exclusively for reflow soldering per NXP's documentation; hand-soldering is not recommended due to thermal stress risks on the SOD323F package. The device's maximum junction temperature is 150 °C, and localized iron contact may exceed this limit. The PZU18B3,115 requires strict adherence to JEDEC J-STD-020 moisture sensitivity level (MSL) and peak reflow profile (260 °C max).
How does the temperature coefficient of PZU18B3,115 impact long-term reference stability?
The PZU18B3,115 exhibits a +13 mV/K temperature coefficient at IZ = 5 mA, meaning its Zener voltage increases by approximately 13 mV per Kelvin rise in junction temperature. This predictable positive drift enables first-order thermal compensation in precision circuits. The PZU18B3,115's coefficient is stable across −65 °C to +150 °C, supporting robust operation in uncontrolled environments.
What is the maximum non-repetitive peak reverse current rating for PZU18B3,115?
The PZU18B3,115 is rated for a non-repetitive peak reverse current (IZSM) of 5.5 A under tp = 100 μs square-wave surge conditions at Tj = 25 °C. This value is derived from its 40 W non-repetitive peak reverse power dissipation rating and confirmed in Table 9 of the NXP datasheet. The PZU18B3,115 uses this capability for transient overvoltage clamping in industrial interfaces.
Is the SOD323F package of PZU18B3,115 compatible with standard pick-and-place equipment?
Yes, the PZU18B3,115 in SOD323F (SC-90) package is fully compatible with industry-standard 4 mm pitch tape-and-reel feeders and vision-guided placement systems. Its 2.7 mm × 1.6 mm outline, 0.65 mm lead pitch, and flat, coplanar terminals meet IPC-7351B footprint standards. The PZU18B3,115's marking bar also supports automated optical recognition during assembly.
PZU18B3,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
PZU18B3,115 FAQ
1.How can I place an order for PZU18B3,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU18B3,115 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 PZU18B3,115 reliable?
The price and inventory of PZU18B3,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU18B3,115 is usually 5 days.
3.What payment methods are accepted for PZU18B3,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU18B3,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU18B3,115?
PZU18B3,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU18B3,115 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 PZU18B3,115?
For technical support, including PZU18B3,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU18B3,115 requirements.
6.How does Aetrix verify that PZU18B3,115 is sourced from the original manufacturer or authorized distributors?
All PZU18B3,115 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 PZU18B3,115 meets industry standards.
7.What is the process for return or replacement of PZU18B3,115?
All PZU18B3,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU18B3,115, 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 PZU18B3,115 part is unused and in its original packaging.
Return procedure for PZU18B3,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU18B3,115 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
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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
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SMAZ12-13-F
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