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onsemi NZ9F18VT5G
- Part No.:
- NZ9F18VT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-923
- Datasheet:
-
NZ9F18VT5G.pdf
- Description:
- DIODE ZENER 18V 250MW SOD923
- Quantity:
- Payment:
- Shipping:
Inventory:8,036
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Product details
Overview
NZ9F18VT5G from onsemi is a 250 mW, 18 V ±5% Zener voltage regulator diode in SOD-923 surface-mount package, designed for precision voltage clamping and overvoltage protection in space-constrained portable electronics. It delivers 14 mV/°C temperature coefficient, 60 pF capacitance at 0 V, and 0.1 µA reverse leakage at 14.4 V, enabling stable regulation in battery-powered RF front-ends and power-rail supervisors.
For engineers reviewing the NZ9F18VT5G datasheet, pinout, applications, or equivalent options, key selection criteria include its 17.1–18.9 V Zener range at 5 mA test current, 50 Ω dynamic impedance at IZT, AEC-Q101 qualification (SZ-prefix variant), low 0.4 mm height, and Class 3 ESD robustness (>16 kV HBM).
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse-biased conduction above its specified Zener breakdown voltage. Its thermal resistance of 500 °C/W and 2.0 mW/°C derating above 25 °C define safe operating limits under continuous DC or pulsed load conditions.
The SOD-923 package enables high-density placement with 1.00 mm × 0.60 mm footprint and 0.40 mm max height. Polarity is marked by cathode band; anode and cathode terminals are unidirectional, requiring correct orientation during PCB layout and reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17.1–18.9 V @ IZT = 5 mA - defines clamping threshold for 18 V nominal rail protection |
| Power Dissipation (PD) | 250 mW @ TA = 25 °C - supports continuous regulation in low-power sensor nodes |
| Zener Impedance (ZZT) | 50 Ω @ IZT = 5 mA - ensures minimal output voltage shift under varying load current |
| Reverse Leakage (IR) | 0.1 µA @ VR = 14.4 V - guarantees negligible standby current in always-on circuits |
| Capacitance (C) | 60 pF @ VR = 0 V, f = 1 MHz - low enough to avoid signal integrity degradation in RF bias networks |
| ESD Rating | Class 3 (>16 kV) per HBM - provides robust handling in manual assembly and end-user environments |
| Temp. Coefficient (TCVZ) | +12.4 mV/°C - enables predictable drift compensation in temperature-stable reference designs |
Pinout & Package
SOD-923 package: 1.00 mm × 0.60 mm body, 0.40 mm max height, matte tin lead finish, MSL 1 rated, compatible with 260 °C peak reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode | Connected to ground or lower-potential reference; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free, RoHS Compliant | Meets global environmental compliance without derating or performance trade-offs |
| AEC-Q101 Qualified (SZ variant) | Validated for automotive-grade reliability including temperature cycling, HTOL, and ESD stress |
| Low Profile (0.40 mm) | Enables placement beneath connectors or in stacked PCB assemblies with tight Z-axis constraints |
| Stable Zener Voltage Range | ±5% tolerance at 5 mA ensures predictable clamping across production lots and temperature |
| High ESD Robustness | Class 3 HBM rating eliminates need for external ESD protection in handheld interface lines |
Applications
| Smartphone Power Management | IoT Sensor Node Reference |
|---|---|
|
Use Scenario: Clamping 18 V supply rail feeding RF power amplifier bias circuitry in LTE/5G handset modules. IC Role / Device Role / Timing Role: Shunt Zener regulator providing overvoltage protection and stable bias voltage reference. Use Value: Prevents amplifier damage during transient surges while maintaining <1% voltage deviation across −40 to +85 °C. |
Use Scenario: Generating precise 18 V reference for analog front-end ADC driver in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Passive voltage reference element stabilizing gain-setting network for instrumentation amplifier. Use Value: Delivers 60 pF capacitance and 0.1 µA leakage to preserve signal-to-noise ratio and extend battery life beyond 5 years. |
| Automotive Body Control Module | Industrial PLC Input Protection |
|
Use Scenario: Protecting LIN bus transceiver VCC input against load-dump transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Fast-response voltage clamp absorbing energy spikes up to 250 mW without latch-up. Use Value: AEC-Q101 qualification ensures operation over −40 to +125 °C junction temperature with no parameter drift. |
Use Scenario: Safeguarding 24 V digital input channel against field-wiring induced surges in factory automation controllers. IC Role / Device Role / Timing Role: Primary overvoltage suppression device placed before optocoupler input stage. Use Value: 50 Ω Zener impedance minimizes voltage overshoot during 1 µs rise-time transients per IEC 61000-4-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C18 | Same 18 V nominal Zener, but 350 mW rating and SOD-523 package (1.2 × 0.8 mm); higher ZZK (100 Ω vs. 80 Ω) | Requires larger PCB area; better suited for higher-power industrial rails than ultra-compact portable designs | Select when >250 mW dissipation margin is needed and board space allows 25% larger footprint |
| MMSZ5246ET1G | 18 V Zener, 500 mW rating, SOD-123 package (3.7 × 1.6 mm); 30 Ω ZZT, but 1.3 mm height limits stacking | Higher power handling but incompatible with ultra-thin assemblies; lacks AEC-Q101 certification | Choose for cost-sensitive industrial controls where size is secondary to thermal margin and legacy compatibility |
Compared with BZX584-C18 and MMSZ5246ET1G, NZ9F18VT5G offers the smallest footprint and lowest profile among 18 V Zeners with automotive qualification, making it optimal for next-gen wearables and miniaturized ECUs where Z-axis clearance and layout density are critical.
Availability
NZ9F18VT5G is available at Aetrix Electronics and suitable for smartphone power management, IoT sensor node reference, and automotive body control module applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for NZ9F18VT5G 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
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
NZ9F18VT5G belongs to the NZ9F/SZNZ9F series of low-profile Zener regulators engineered specifically for space-constrained, high-reliability portable and automotive electronics requiring precise voltage clamping in ultra-small packages.
FAQ
What is the Zener voltage tolerance of NZ9F18VT5G?
The NZ9F18VT5G has a guaranteed Zener voltage range of 17.1 V to 18.9 V at 5 mA test current, representing ±5% tolerance around the nominal 18 V rating. This tolerance is validated per onsemi's production testing and applies across the full operating temperature range of −65 °C to +150 °C junction temperature.
Is NZ9F18VT5G suitable for automotive applications?
The NZ9F18VT5G itself is not AEC-Q101 qualified; however, its SZ-prefix variant SZNZ9F18VT5G is fully AEC-Q101 qualified and PPAP capable. For automotive use, engineers must specify SZNZ9F18VT5G - the NZ9F18VT5G part number denotes the commercial-grade version intended for consumer and industrial systems.
What is the maximum steady-state power dissipation for NZ9F18VT5G?
NZ9F18VT5G has a maximum steady-state power dissipation of 250 mW at ambient temperature of 25 °C. Power must be linearly derated by 2.0 mW/°C above 25 °C, reaching zero dissipation at 150 °C ambient - consistent with its 500 °C/W junction-to-ambient thermal resistance.
Does NZ9F18VT5G have polarity marking, and how is it oriented on PCB?
Yes, NZ9F18VT5G uses Style 1 marking per onsemi's SOD-923 mechanical drawing: Pin 1 (cathode) is identified by a polarity band at the banded end of the package. During PCB layout, the banded end must align with the cathode net; incorrect orientation will prevent Zener conduction and cause open-circuit behavior.
What is the reverse leakage current specification for NZ9F18VT5G?
NZ9F18VT5G specifies a maximum reverse leakage current (IR) of 0.1 µA at VR = 14.4 V (80% of nominal Zener voltage). This low leakage ensures minimal quiescent current draw in always-on circuits such as real-time clock backup supplies or sensor wake-up monitors.
NZ9F18VT5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-923
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 50 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-923
NZ9F18VT5G FAQ
1.How can I place an order for NZ9F18VT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for NZ9F18VT5G 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 NZ9F18VT5G reliable?
The price and inventory of NZ9F18VT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZ9F18VT5G is usually 5 days.
3.What payment methods are accepted for NZ9F18VT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZ9F18VT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NZ9F18VT5G?
NZ9F18VT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NZ9F18VT5G 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 NZ9F18VT5G?
For technical support, including NZ9F18VT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZ9F18VT5G requirements.
6.How does Aetrix verify that NZ9F18VT5G is sourced from the original manufacturer or authorized distributors?
All NZ9F18VT5G 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 NZ9F18VT5G meets industry standards.
7.What is the process for return or replacement of NZ9F18VT5G?
All NZ9F18VT5G units undergo pre-shipment inspection (PSI). If there is an issue with NZ9F18VT5G, 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 NZ9F18VT5G part is unused and in its original packaging.
Return procedure for NZ9F18VT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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