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onsemi NZ9F12VST5G
- Part No.:
- NZ9F12VST5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-923
- Datasheet:
-
NZ9F12VST5G.pdf
- Description:
- DIODE ZENER 12V 250MW SOD923
- Quantity:
- Payment:
- Shipping:
Inventory:2,280
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Product details
Overview
NZ9F12VST5G from onsemi is a 12 V ±4.2% Zener diode in SOD-923 package, rated for 250 mW steady-state power dissipation at 25 °C, with 30 Ω maximum Zener impedance at 5 mA test current and 80 pF capacitance at 0 V/1 MHz - used for precision voltage regulation and ESD protection in space-constrained portable electronics.
For engineers reviewing the NZ9F12VST5G datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 11.74–12.24 V Zener voltage tolerance, Class 3 (>16 kV) HBM ESD rating, low 0.40 mm body height, AEC-Q101 qualification (SZ-prefix variant), and compatibility with reflow profiles up to 260 °C.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at ~12 V with minimal dynamic impedance. Its thermal resistance of 500 °C/W and derating slope of 2.0 mW/°C above 25 °C define safe operating limits under continuous DC bias.
The SOD-923 package enables high-density PCB layout with 1.00 mm × 0.60 mm footprint and polarity-marked cathode/anode terminals. It meets MSL 1 moisture sensitivity and uses 100% matte tin lead finish for solderability and RoHS compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.74 V to 12.24 V at IZT = 5 mA - defines precise clamping threshold for overvoltage protection circuits |
| Power Dissipation (PD) | 250 mW at TA = 25 °C - sets maximum continuous DC power handling on FR-5 board |
| Zener Impedance (ZZT) | ≤30 Ω at IZT = 5 mA - ensures stable regulation under small-signal load variations |
| Capacitance (C) | ≤80 pF at VR = 0 V, f = 1 MHz - minimizes signal distortion in RF-coupled or high-speed data lines |
| ESD Rating (HBM) | Class 3 (>16 kV) - provides robust electrostatic discharge immunity without external TVS staging |
| Operating Temperature | −65 °C to +150 °C - supports deployment in automotive under-hood and industrial environments |
| Package | SOD-923 (Case 514AB) - 1.00 mm × 0.60 mm × 0.37 mm footprint ideal for ultra-thin mobile PCBs |
Pinout & Package
SOD-923 surface-mount package with molded thermosetting plastic case (UL 94 V-0), 100% matte tin plating, and MSL 1 rating. Mounting position is unrestricted; qualified for peak reflow temperature of 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked Band) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode | Connected to ground or lower-potential rail; completes conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Tight VZ tolerance | ±4.2% (11.74–12.24 V) at 5 mA - reduces need for post-regulation trimming in precision analog supplies |
| Low-profile packaging | 0.37 mm max height - enables use in <1.0 mm total PCB stack-up designs such as wearables |
| High ESD robustness | >16 kV HBM - eliminates requirement for discrete ESD diodes in USB/IO protection networks |
| Pb-free & RoHS compliant | 100% matte Sn finish, no lead content - satisfies global environmental compliance mandates without performance trade-off |
Applications
| Smartphone Power Rail Protection | USB-C Port ESD Clamping |
|---|---|
Use Scenario: Protecting 12 V auxiliary rails in smartphone baseband modules from transient surges during battery charging cycles. IC Role / Device Role / Timing Role: Zener voltage clamp placed between rail and ground to shunt overvoltage spikes exceeding 12.24 V. Use Value: Prevents latch-up in PMICs by limiting excursion to ≤12.24 V with sub-30 Ω dynamic impedance and 80 pF loading. | Use Scenario: Safeguarding USB-C CC and VCONN lines against human-body ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Bidirectional ESD suppressor leveraging low-capacitance Zener structure to avoid signal integrity degradation. Use Value: Delivers >16 kV HBM protection while adding only 80 pF capacitance - preserves USB 2.0 eye diagram integrity. |
| Automotive Infotainment Display Bias | Industrial Sensor Signal Conditioning |
Use Scenario: Stabilizing 12 V backlight bias supply for TFT-LCD displays in automotive dashboards exposed to load-dump transients. IC Role / Device Role / Timing Role: Primary voltage reference and transient suppressor in linear regulator feedback path. Use Value: AEC-Q101 qualification and −65 °C to +150 °C operation ensure reliability across vehicle lifecycle without derating. | Use Scenario: Providing stable 12 V reference for 4–20 mA loop-powered pressure transmitters in factory automation systems. IC Role / Device Role / Timing Role: Precision shunt reference maintaining excitation voltage despite supply ripple and temperature drift. Use Value: ±4.2% VZ tolerance and 0.4 mV/°C tempco enable <0.5% full-scale error over −40 °C to +85 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C12LT1G | Same 12 V nominal VZ, but ±5% tolerance (11.4–12.6 V); 350 mW PD; SOD-523 package (smaller 0.8 × 0.6 mm, same height) | Higher power rating allows greater surge energy absorption; tighter board area constraint due to smaller pad layout | Select when higher pulse power capability is required and PCB real estate permits SOD-523 footprint adaptation |
| MMSZ5242BT1G | 12 V nominal VZ, ±5% tolerance; 500 mW PD; SOD-123 package (larger 3.5 × 1.6 mm, 1.1 mm height) | Lower thermal resistance (350 °C/W) supports higher ambient temperatures; incompatible with ultra-thin form factors | Choose for industrial control panels where board thickness >1.2 mm and long-term thermal stability outweighs size constraints |
Compared with BZX584C12LT1G and MMSZ5242BT1G, NZ9F12VST5G offers superior VZ tolerance (±4.2% vs ±5%), lowest profile (0.37 mm), and AEC-Q101 qualification - making it optimal for automotive and portable electronics where precision, height, and qualification matter most.
Availability
NZ9F12VST5G is available at Aetrix Electronics and suitable for smartphone power rail protection, USB-C port ESD clamping, and automotive infotainment display bias requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for NZ9F12VST5G 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 (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
NZ9F12VST5G belongs to the NZ9FxxxST5G Zener regulator series designed specifically for space-constrained, high-reliability voltage reference and transient suppression in portable and automotive electronics.
FAQ
What is the exact Zener voltage range specified for NZ9F12VST5G?
The NZ9F12VST5G has a guaranteed Zener voltage range of 11.74 V to 12.24 V at a test current of 5 mA, representing a ±4.2% tolerance around the nominal 12 V rating. This specification is measured per the onsemi datasheet under standard conditions (TA = 25 °C) and is validated across production lots. The NZ9F12VST5G maintains this tight tolerance without requiring binning or external calibration.
Is NZ9F12VST5G qualified for automotive applications?
Yes, the SZ-prefix variant SZNZ9F12VST5G is AEC-Q101 qualified and PPAP capable, but the standard NZ9F12VST5G (non-SZ prefix) is not automotive-qualified. While both share identical electrical and mechanical specifications, only the SZ version undergoes the extended stress testing and documentation required for automotive use. Engineers must specify SZNZ9F12VST5G explicitly for automotive-grade deployments.
What is the maximum allowable junction temperature for NZ9F12VST5G?
The maximum junction temperature (TJ) for NZ9F12VST5G is +150 °C, with a storage temperature range of −65 °C to +150 °C. Thermal derating begins above 25 °C at 2.0 mW/°C, meaning usable power drops to 150 mW at 75 °C ambient. This limit ensures long-term reliability under sustained DC bias and transient overload conditions typical in NZ9F12VST5G applications.
Does NZ9F12VST5G have a polarity marking, and how is it oriented on the PCB?
Yes, NZ9F12VST5G uses Style 1 marking per the SOD-923 mechanical drawing: a visible band on the package denotes Pin 1 (Cathode), while the unmarked end is Pin 2 (Anode). When mounted on PCB, the banded end must align with the cathode net (typically connected to the protected voltage rail), and the opposite end connects to ground or return. Misorientation prevents proper Zener conduction and renders NZ9F12VST5G nonfunctional.
Can NZ9F12VST5G be used as a substitute for older 1N4742A Zener diodes?
No, NZ9F12VST5G is not a direct substitute for 1N4742A due to fundamental differences: 1N4742A is a through-hole DO-41 device rated for 1 W, while NZ9F12VST5G is a 250 mW SOD-923 surface-mount Zener. Their thermal behavior, mounting method, and surge capability differ significantly. Replacing 1N4742A with NZ9F12VST5G requires full revalidation of power dissipation, layout, and transient response - NZ9F12VST5G serves different design priorities (size, ESD, profile) rather than raw power handling.
NZ9F12VST5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-923
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 9 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
NZ9F12VST5G FAQ
1.How can I place an order for NZ9F12VST5G through Aetrix?
Please submit a Request for Quotation (RFQ) for NZ9F12VST5G 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 NZ9F12VST5G reliable?
The price and inventory of NZ9F12VST5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZ9F12VST5G is usually 5 days.
3.What payment methods are accepted for NZ9F12VST5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZ9F12VST5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NZ9F12VST5G?
NZ9F12VST5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NZ9F12VST5G 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 NZ9F12VST5G?
For technical support, including NZ9F12VST5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZ9F12VST5G requirements.
6.How does Aetrix verify that NZ9F12VST5G is sourced from the original manufacturer or authorized distributors?
All NZ9F12VST5G 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 NZ9F12VST5G meets industry standards.
7.What is the process for return or replacement of NZ9F12VST5G?
All NZ9F12VST5G units undergo pre-shipment inspection (PSI). If there is an issue with NZ9F12VST5G, 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 NZ9F12VST5G part is unused and in its original packaging.
Return procedure for NZ9F12VST5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NZ9F12VST5G Tags
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