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onsemi SZNZ9F4V7ST5G
- Part No.:
- SZNZ9F4V7ST5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-923
- Datasheet:
-
SZNZ9F4V7ST5G.pdf
- Description:
- DIODE ZENER 4.7V 250MW SOD923
- Quantity:
- Payment:
- Shipping:
Inventory:21,685
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Product details
Overview
SZNZ9F4V7ST5G from onsemi is a 250 mW, 4.55–4.75 V Zener voltage regulator diode in SOD-923 package, designed for precision low-voltage regulation and ESD protection in space-constrained PCBs. It delivers tight Zener tolerance (±2.2% at 5 mA), low dynamic impedance (800 Ω max at IZT), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SZNZ9F4V7ST5G datasheet, pinout, applications, or equivalent options, key selection criteria include its 150 pF capacitance at 0 V, −3.5 mV/°C temperature coefficient, Class 3 HBM ESD rating (>16 kV), and suitability for voltage clamping in portable power rails and I/O protection circuits.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its 250 mW steady-state power rating and 500 °C/W junction-to-ambient thermal resistance define safe operating limits on FR-5 board at 25 °C ambient.
The device features low-profile SOD-923 packaging (1.00 mm × 0.60 mm × 0.37 mm), 100% matte tin lead finish, MSL 1 reflow compatibility up to 260 °C, and polarity marking with cathode band - enabling automated placement and high-density routing in handheld and automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.55–4.75 V at 5 mA test current - ensures precise clamping within ±2.2% tolerance for 5 V rail stabilization |
| Power Dissipation (PD) | 250 mW at 25 °C - supports continuous regulation in low-power sensor interfaces and I/O buffers |
| Zener Impedance (ZZT) | ≤800 Ω at IZT = 5 mA - minimizes output voltage variation under dynamic load transients |
| Capacitance (C) | 150 pF max at VR = 0 V, f = 1 MHz - preserves signal integrity in high-speed data lines without excessive loading |
| ESD Rating | Class 3 (>16 kV) per HBM - provides robust electrostatic discharge immunity for exposed ports and connectors |
| Temp Coefficient (dVZ/dT) | −3.5 mV/°C - enables predictable voltage drift compensation in automotive cabin modules |
| Junction Temp Range | −65 to +150 °C - meets extended thermal requirements for under-hood and industrial control applications |
Pinout & Package
Package: SOD-923 (Case 514AB), dimensions 1.00 mm × 0.60 mm × 0.37 mm, cathode marked with polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener operation |
| 2 | Anode | Connected to ground or lower-potential reference; completes bias path for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including infotainment power sequencing and body control module voltage supervision |
| Tight VZ Tolerance | ±2.2% at 5 mA enables accurate 5 V rail clamping without external trimming components |
| Low Capacitance | 150 pF max avoids signal degradation in USB 2.0, I²C, and SPI interface protection |
| Pb-Free & RoHS Compliant | 100% matte Sn finish and halogen-free epoxy meet global environmental compliance mandates |
| MSL 1 Reflow Rating | Rated for unlimited floor life and single reflow up to 260 °C - simplifies SMT manufacturing flow |
Applications
| USB Port ESD Protection | Automotive Cabin Sensor Biasing |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines from contact ESD events in vehicle infotainment head units. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between connector and PHY IC. Use Value: 150 pF capacitance prevents signal rise-time degradation while >16 kV HBM rating absorbs IEC 61000-4-2 Level 4 surges. | Use Scenario: Providing stable 4.7 V bias reference for analog pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed reference voltage for ADC input scaling. Use Value: ±2.2% VZ tolerance and −3.5 mV/°C tempco ensure <0.5% total error across −40 to +105 °C operating range. |
| Portable Device Power Rail Clamp | Industrial PLC Digital Input Protection |
Use Scenario: Clamping 5 V supply rail against overvoltage transients in Bluetooth earbud charging circuitry. IC Role / Device Role / Timing Role: Low-power Zener shunt element limiting rail excursion during fast-switching LDO faults. Use Value: 250 mW rating and 800 Ω ZZT allow sustained clamping without thermal runaway in 1.0 mm² board area. | Use Scenario: Protecting 24 V digital input channels from field-wiring induced surges in factory automation controllers. IC Role / Device Role / Timing Role: Primary front-end clamp before TVS array and optocoupler isolation stage. Use Value: SOD-923 footprint enables dense channel packing; AEC-Q101 qualification validates long-term reliability in harsh EMI environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C4V7 | 4.7 V nominal, ±5% tolerance, 300 mW rating, SOD-323 package (1.7 × 1.3 mm) | Larger footprint and looser tolerance reduce suitability for ultra-dense portable layouts | Select when higher power margin is needed and board space permits larger package |
| MMSZ4704T1G | 4.7 V nominal, ±5% tolerance, 500 mW rating, SOD-123 package (3.7 × 1.6 mm) | Higher power but 2.5× larger footprint and no AEC-Q101 qualification | Prefer for non-automotive industrial use where thermal headroom outweighs size constraints |
Compared with BZX584-C4V7 and MMSZ4704T1G, the SZNZ9F4V7ST5G offers tighter voltage control, smaller SOD-923 footprint, and automotive qualification - making it optimal for space-limited, safety-critical 5 V rail stabilization where precision and reliability are prioritized over raw power handling.
Availability
SZNZ9F4V7ST5G is available at Aetrix Electronics and suitable for USB port protection, automotive sensor biasing, and portable power rail clamping requiring stable component supply and full traceability.
Supply support for SZNZ9F4V7ST5G 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.
The NZ9F/SZNZ9F series targets miniaturized voltage regulation and ESD protection in high-density portable and automotive electronics, emphasizing small-outline packaging, tight parametric control, and AEC-Q101 compliance.
FAQ
What is the Zener voltage tolerance of SZNZ9F4V7ST5G?
The SZNZ9F4V7ST5G has a Zener voltage range of 4.55 V to 4.75 V at 5 mA test current, corresponding to ±2.2% tolerance around the nominal 4.7 V value. This tight specification is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet and supports precision voltage clamping in regulated 5 V systems where minimal deviation is required.
Is SZNZ9F4V7ST5G qualified for automotive applications?
Yes, the SZNZ9F4V7ST5G carries the "SZ" prefix indicating AEC-Q101 qualification and PPAP capability. It is explicitly designated for automotive and other applications requiring unique site and control change requirements, and its qualification is documented in the Specification Features section of the onsemi datasheet.
What is the maximum operating temperature for SZNZ9F4V7ST5G?
The SZNZ9F4V7ST5G has a junction and storage temperature range of −65 °C to +150 °C. This extended range allows reliable operation in under-hood automotive environments and industrial control cabinets where ambient temperatures exceed standard commercial limits.
Does SZNZ9F4V7ST5G have ESD protection capability?
Yes, the SZNZ9F4V7ST5G is rated Class 3 (>16 kV) per Human Body Model (HBM), as stated in the Specification Features section. This makes it suitable for direct placement on I/O lines subject to frequent human contact, such as USB ports and front-panel buttons in automotive and consumer devices.
What is the package type and marking convention for SZNZ9F4V7ST5G?
The SZNZ9F4V7ST5G uses the SOD-923 package (Case 514AB), with dimensions 1.00 mm × 0.60 mm × 0.37 mm. Per the Marking Diagram on page 4, it is marked with "E" as the specific device code followed by a date code; the cathode is identified by a polarity band at Pin 1.
SZNZ9F4V7ST5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-923
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- -
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-923
SZNZ9F4V7ST5G FAQ
1.How can I place an order for SZNZ9F4V7ST5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNZ9F4V7ST5G 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 SZNZ9F4V7ST5G reliable?
The price and inventory of SZNZ9F4V7ST5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNZ9F4V7ST5G is usually 5 days.
3.What payment methods are accepted for SZNZ9F4V7ST5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNZ9F4V7ST5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNZ9F4V7ST5G?
SZNZ9F4V7ST5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNZ9F4V7ST5G 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 SZNZ9F4V7ST5G?
For technical support, including SZNZ9F4V7ST5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNZ9F4V7ST5G requirements.
6.How does Aetrix verify that SZNZ9F4V7ST5G is sourced from the original manufacturer or authorized distributors?
All SZNZ9F4V7ST5G 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 SZNZ9F4V7ST5G meets industry standards.
7.What is the process for return or replacement of SZNZ9F4V7ST5G?
All SZNZ9F4V7ST5G units undergo pre-shipment inspection (PSI). If there is an issue with SZNZ9F4V7ST5G, 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 SZNZ9F4V7ST5G part is unused and in its original packaging.
Return procedure for SZNZ9F4V7ST5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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