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onsemi NZ9F3V9ST5G
- Part No.:
- NZ9F3V9ST5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-923
- Datasheet:
-
NZ9F3V9ST5G.pdf
- Description:
- DIODE ZENER 4.03V 250MW SOD923
- Quantity:
- Payment:
- Shipping:
Inventory:7,238
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Product details
Overview
NZ9F3V9ST5G from onsemi is a 3.89 V to 4.16 V Zener diode in SOD-923 package, rated for 250 mW steady-state power dissipation, ±5% Zener voltage tolerance at 5 mA test current, and ESD-rated to >16 kV (HBM). It serves as a precision voltage reference and overvoltage clamp in space-constrained portable electronics.
For engineers reviewing the NZ9F3V9ST5G datasheet, pinout, applications, or equivalent options, key selection criteria include its tight VZ tolerance, low-profile 0.40 mm height, AEC-Q101 qualification (SZ-prefix variant), thermal resistance of 500 °C/W, and compatibility with reflow profiles up to 260 °C.
Technical Context
This device operates as a two-terminal voltage-regulating diode, conducting in reverse breakdown to maintain stable voltage across load circuits. Its Zener impedance is ≤100 Ω at IZT = 5 mA and ≤1000 Ω at IZK = 1.0 mA, with reverse leakage ≤5 μA at VR = 1 V.
The NZ9F3V9ST5G exhibits a temperature coefficient of −2.5 mV/°C at IZT = 5 mA and maximum junction capacitance of 210 pF at VR = 0 V and f = 1 MHz. It is Pb-free, RoHS-compliant, and qualified per MSL Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.89 V to 4.16 V at IZT = 5 mA - defines clamping threshold for protection or reference stability |
| Power Dissipation (PD) | 250 mW @ TA = 25 °C - sets max continuous power handling on FR-5 board |
| Zener Impedance (ZZT) | ≤100 Ω @ IZT = 5 mA - ensures low dynamic impedance for stable regulation under load transients |
| Reverse Leakage (IR) | ≤5 μA @ VR = 1 V - minimizes standby current in battery-powered systems |
| ESD Rating (HBM) | >16 kV - provides robust electrostatic discharge immunity without external protection |
| Package Dimensions | 1.00 mm × 0.60 mm × 0.40 mm - enables high-density placement on compact PCBs |
| Thermal Resistance (RJA) | 500 °C/W - determines junction temperature rise under given power dissipation |
Pinout & Package
Package: SOD-923 (Case 514AB), surface-mount, void-free thermosetting plastic body with 100% matte tin lead finish. Mounting position: any. Qualified for reflow up to 260 °C; MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked Band) | Cathode | Connected to higher-potential node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode | Connected to lower-potential node or ground; completes conduction path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener Voltage Tolerance | ±5% at IZT = 5 mA - reduces calibration overhead in precision reference designs |
| Low Profile Height | 0.40 mm max - allows placement beneath connectors or under shields in ultra-thin devices |
| AEC-Q101 Qualification | SZ-prefix variants qualified - supports automotive infotainment and body control module deployments |
| Pb-Free & RoHS Compliant | Meets JEDEC J-STD-020 and EU RoHS Directive - enables global market access and green manufacturing |
| High ESD Robustness | >16 kV HBM - eliminates need for discrete ESD diodes in many handheld interface paths |
Applications
| Smartphone Power Rail Clamping | Wearable Battery Voltage Monitoring |
|---|---|
Use Scenario: Clamping USB input rail against surge events in smartphone charging circuitry. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing overvoltage protection for PMIC input stage. Use Value: Prevents damage to downstream LDOs and battery chargers by clamping transients above 4.16 V with sub-5 μA leakage at 1 V. | Use Scenario: Providing stable reference for ADC measurement of Li-ion cell voltage in fitness trackers. IC Role / Device Role / Timing Role: Precision Zener reference source for 12-bit analog-to-digital conversion. Use Value: Enables ±2% voltage reading accuracy over temperature due to −2.5 mV/°C tempco and tight initial tolerance. |
| IoT Sensor Node ESD Protection | Industrial Handheld Terminal Reference |
Use Scenario: Protecting I²C data lines from ESD events in wireless environmental sensors. IC Role / Device Role / Timing Role: Low-capacitance (210 pF) shunt clamp on bidirectional signal lines. Use Value: Maintains signal integrity up to 1 MHz while surviving >16 kV contact discharge without degradation. | Use Scenario: Generating local 4.0 V reference for microcontroller reset supervisor and brown-out detection. IC Role / Device Role / Timing Role: Stable DC voltage reference for power management logic. Use Value: Ensures deterministic reset behavior across −40 °C to +85 °C with RJA = 500 °C/W and derating curve support. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C3V9 | 3.9 V nominal, ±5% tolerance, SOD-523 package (0.6 × 0.3 × 0.3 mm), 200 mW rating | Smaller footprint but lower power rating; higher ZZK (2000 Ω) limits low-current regulation fidelity | Preferred when board area is more constrained than power margin, and leakage <1 μA @ 1 V is required |
| MMSZ4685 | 3.9 V nominal, ±5% tolerance, SOD-123 package (3.7 × 1.6 × 1.1 mm), 500 mW rating | Larger package increases board area use; higher PD supports sustained clamping in industrial environments | Chosen when thermal performance (RJA ≈ 300 °C/W) and higher surge energy absorption are critical |
Compared with BZX584C3V9 and MMSZ4685, the NZ9F3V9ST5G delivers optimal balance of ultra-small size, AEC-Q101 readiness, and 250 mW capability-making it ideal for next-gen portable and automotive-qualified designs where both volume and reliability matter.
Availability
NZ9F3V9ST5G is available at Aetrix Electronics and suitable for smartphone power rail clamping, wearable battery monitoring, and IoT sensor node ESD protection requiring stable component supply and full traceability.
Supply support for NZ9F3V9ST5G 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.
The NZ9F3V9ST5G belongs to onsemi's NZ9F series of miniature Zener regulators-designed specifically for space-constrained, high-reliability portable and automotive electronics needing precise voltage references and robust ESD immunity.
FAQ
What is the exact Zener voltage range specified for NZ9F3V9ST5G?
The NZ9F3V9ST5G has a guaranteed Zener voltage range of 3.89 V to 4.16 V when tested at IZT = 5 mA and TA = 25 °C. This 5% tolerance band is tighter than many legacy Zeners and supports accurate voltage clamping or referencing without post-production trimming.
Is NZ9F3V9ST5G qualified for automotive applications?
The SZ-prefix variant (SZNZ9F3V9ST5G) is AEC-Q101 qualified and PPAP capable, but the standard NZ9F3V9ST5G is not automotive-qualified. For automotive use, specify SZNZ9F3V9ST5G-both share identical electrical specs, packaging, and marking except for qualification documentation and traceability controls.
What is the maximum operating temperature for NZ9F3V9ST5G?
The NZ9F3V9ST5G has a junction and storage temperature range of −65 °C to +150 °C. Its thermal resistance (RJA) is 500 °C/W, so at 250 mW dissipation and TA = 85 °C, junction temperature reaches ~210 °C-exceeding rating. Derating is required: max PD drops to 150 mW at 85 °C ambient.
Does NZ9F3V9ST5G have polarity marking, and how is it identified?
Yes, NZ9F3V9ST5G uses Style 1 marking per onsemi mechanical drawing: Pin 1 (cathode) is indicated by a polarity band on the package body. The marking code "A" (per datasheet page 3) appears adjacent to the band, confirming cathode orientation. Anode is unmarked Pin 2.
What is the forward voltage specification for NZ9F3V9ST5G?
The NZ9F3V9ST5G has a maximum forward voltage (VF) of 0.9 V at IF = 10 mA, consistent across the entire NZ9F series. This parameter matters for reverse-polarity protection circuits where the diode may conduct forward during fault conditions.
NZ9F3V9ST5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-923
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.03 V
- Tolerance:
- ±3%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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
NZ9F3V9ST5G FAQ
1.How can I place an order for NZ9F3V9ST5G through Aetrix?
Please submit a Request for Quotation (RFQ) for NZ9F3V9ST5G 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 NZ9F3V9ST5G reliable?
The price and inventory of NZ9F3V9ST5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZ9F3V9ST5G is usually 5 days.
3.What payment methods are accepted for NZ9F3V9ST5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZ9F3V9ST5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NZ9F3V9ST5G?
NZ9F3V9ST5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NZ9F3V9ST5G 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 NZ9F3V9ST5G?
For technical support, including NZ9F3V9ST5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZ9F3V9ST5G requirements.
6.How does Aetrix verify that NZ9F3V9ST5G is sourced from the original manufacturer or authorized distributors?
All NZ9F3V9ST5G 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 NZ9F3V9ST5G meets industry standards.
7.What is the process for return or replacement of NZ9F3V9ST5G?
All NZ9F3V9ST5G units undergo pre-shipment inspection (PSI). If there is an issue with NZ9F3V9ST5G, 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 NZ9F3V9ST5G part is unused and in its original packaging.
Return procedure for NZ9F3V9ST5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NZ9F3V9ST5G Tags
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