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onsemi SZNZ9F2V7ST5G
- Part No.:
- SZNZ9F2V7ST5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-923
- Datasheet:
-
SZNZ9F2V7ST5G.pdf
- Description:
- DIODE ZENER 2.7V 250MW SOD923
- Quantity:
- Payment:
- Shipping:
Inventory:7,790
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Product details
Overview
SZNZ9F2V7ST5G from onsemi is a 2.67–2.91 V, 250 mW Zener voltage regulator diode in SOD-923 package, designed for precision low-voltage regulation and ESD-sensitive signal-line protection in space-constrained portable electronics. It delivers tight Zener tolerance (±4.5% at IZT = 5 mA), 100 Ω dynamic impedance at test current, and Class 3 HBM ESD rating (>16 kV).
For engineers reviewing the SZNZ9F2V7ST5G datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.79 V nominal Zener voltage, 250 mW power dissipation on FR-5 board, SOD-923 footprint (1.00 mm × 0.60 mm × 0.40 mm), AEC-Q101 qualification, and automotive-grade SZ-prefix marking compliance.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable reverse-biased breakdown across load variations. Its Zener voltage exhibits a −3.5 mV/°C temperature coefficient and is specified at 5 mA test current with 100 Ω maximum impedance at that point.
The SZNZ9F2V7ST5G uses a void-free thermosetting plastic case (UL 94 V-0), matte tin lead finish, and meets MSL 1 reflow requirements (260 °C peak). It supports any mounting orientation and achieves 500 °C/W junction-to-ambient thermal resistance on FR-5 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.67–2.91 V at IZT = 5 mA - defines regulated output range for low-voltage biasing and clamping |
| Power Dissipation (PD) | 250 mW @ TA = 25 °C - sets maximum continuous power handling on standard FR-5 PCB |
| Zener Impedance (ZZT) | ≤100 Ω @ IZT = 5 mA - ensures minimal voltage deviation under dynamic load changes |
| ESD Rating (HBM) | >16 kV - provides robust electrostatic discharge immunity for handheld and USB-connected interfaces |
| Package Dimensions | 1.00 mm × 0.60 mm × 0.40 mm - enables high-density placement on compact PCBs like smartphone mainboards |
| Temperature Coefficient | −3.5 mV/°C @ IZT = 5 mA - quantifies voltage drift over operating temperature range (−65 to +150 °C) |
| Reverse Leakage (IR) | ≤20 µA @ VR = 1 V - guarantees low standby current in battery-powered systems |
Pinout & Package
SZNZ9F2V7ST5G is housed in a surface-mount SOD-923 (Case 514AB) package with 2 terminals: cathode (marked with polarity band) and anode. Body dimensions are 1.00 mm × 0.60 mm × 0.40 mm; mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated Output Reference Node | Connected to the voltage rail being stabilized; polarity band identifies this terminal for correct PCB layout |
| 2 (Anode) | Ground or Return Path | Provides current return path during Zener conduction; must be tied to system ground or low-impedance reference |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including infotainment power rails and sensor bias networks |
| Tight VZ Tolerance | ±4.5% at 5 mA enables accurate 2.79 V reference without post-production trimming |
| Low Profile Height | 0.40 mm max height allows stacking under shields and integration into ultra-thin modules |
| Pb-Free & RoHS Compliant | 100% matte Sn lead finish meets global environmental compliance and solderability standards |
| MSL 1 Rating | Unlimited floor life before reflow; no dry-pack or baking required for production assembly |
Applications
| USB Data Line Protection | Smartphone Battery Monitor Bias |
|---|---|
|
Use Scenario: Clamping transient surges on USB 2.0 D+/D− lines during hot-plug events. IC Role / Device Role / Timing Role: Shunt protection element absorbing ESD energy while holding line voltage below IC damage threshold. Use Value: Leverages >16 kV HBM rating and 2.79 V Zener voltage to protect PHY transceivers without adding series resistance or latency. |
Use Scenario: Providing stable reference voltage for fuel-gauge ADC inputs in Li-ion battery management. IC Role / Device Role / Timing Role: Precision shunt reference supplying known voltage to analog front-end comparators. Use Value: ±4.5% VZ tolerance and −3.5 mV/°C tempco ensure consistent SOC estimation across −20 to +70 °C ambient. |
| Automotive Cabin Sensor Supply | Wearable Heart Rate Monitor Reference |
|
Use Scenario: Regulating bias voltage for MEMS microphones and ambient light sensors in dashboard modules. IC Role / Device Role / Timing Role: Low-power voltage clamp ensuring sensor analog outputs remain within ADC input range. Use Value: 250 mW rating and SOD-923 footprint allow direct integration near sensors without heatsinking or layout rerouting. |
Use Scenario: Stabilizing reference for photodiode amplifier stages in optical PPG circuits. IC Role / Device Role / Timing Role: Low-noise DC reference source minimizing baseline drift in analog signal chains. Use Value: 100 Ω ZZT and 20 µA leakage at 1 V enable stable DC operating point with sub-µV ripple in ultra-low-power modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C2V7 | 2.7 V nominal, 300 mW, SOD-523 package (1.2 × 0.8 mm), higher ZZT (150 Ω) | Larger footprint; less suitable for ultra-dense layouts where SOD-923 is mandated | Preferred when higher power margin is needed and board area permits larger package |
| MMSZ4678T1G | 2.7 V nominal, 500 mW, SOD-123 package (3.7 × 1.6 mm), lower tempco (−2.0 mV/°C) | 3.7× larger footprint; better thermal performance but incompatible with fine-pitch routing | Chosen for industrial designs requiring extended power derating and wider temperature stability |
Compared with BZX584C2V7 and MMSZ4678T1G, the SZNZ9F2V7ST5G offers the smallest PCB footprint and AEC-Q101 qualification, making it optimal for automotive and portable consumer designs where space, reliability, and regulatory compliance are jointly constrained.
Availability
SZNZ9F2V7ST5G is available at Aetrix Electronics and suitable for USB interface protection, smartphone battery monitoring, and automotive cabin sensor biasing requiring stable component supply and long-term lifecycle support.
Supply support for SZNZ9F2V7ST5G 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 was engineered specifically for miniaturized, high-reliability voltage regulation in portable and automotive electronics-prioritizing low profile, tight tolerance, and AEC-Q101 compliance over general-purpose use.
FAQ
What is the nominal Zener voltage of the SZNZ9F2V7ST5G?
The SZNZ9F2V7ST5G has a nominal Zener voltage of 2.79 V, with a guaranteed range of 2.67 V to 2.91 V at a test current of 5 mA. This value is measured under standard conditions (TA = 25 °C) and reflects the device's primary function as a precision low-voltage shunt reference. The SZNZ9F2V7ST5G maintains this regulation with ≤100 Ω dynamic impedance at the same test point.
Is the SZNZ9F2V7ST5G suitable for automotive applications?
Yes, the SZNZ9F2V7ST5G is AEC-Q101 qualified and PPAP capable, with the "SZ" prefix indicating automotive-grade process control and site-specific change management. Its −65 °C to +150 °C operating range, 16 kV HBM ESD rating, and tight Zener tolerance make it appropriate for cabin sensors, infotainment power rails, and body control module references. The SZNZ9F2V7ST5G meets all stress-test requirements defined in the AEC-Q101 standard.
What is the thermal resistance of the SZNZ9F2V7ST5G on a standard PCB?
The SZNZ9F2V7ST5G has a junction-to-ambient thermal resistance (RJA) of 500 °C/W when mounted on an FR-5 board per the datasheet's test condition. This value assumes minimum pad design and defines the device's steady-state power derating curve: 2.0 mW/°C above 25 °C ambient. The SZNZ9F2V7ST5G reaches full 250 mW dissipation only at TA = 25 °C.
Does the SZNZ9F2V7ST5G have a polarity marking?
Yes, the SZNZ9F2V7ST5G uses Style 1 marking per the SOD-923 mechanical drawing: Pin 1 (cathode) is identified by a polarity band on the package body. The anode (Pin 2) is unmarked. This marking aligns with JEDEC-standard orientation for SOD-923 devices and must be observed during PCB layout to ensure correct reverse-bias operation. The SZNZ9F2V7ST5G will not regulate if installed with reversed polarity.
What is the maximum reverse leakage current for the SZNZ9F2V7ST5G?
The SZNZ9F2V7ST5G specifies a maximum reverse leakage current (IR) of 20 µA at VR = 1 V and TA = 25 °C. This low leakage supports battery-powered applications where standby current must be minimized. At VR = 0.5 V, leakage drops further-typically below 1 µA-making the SZNZ9F2V7ST5G suitable for precision bias networks where quiescent power is critical.
SZNZ9F2V7ST5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-923
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 20 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
SZNZ9F2V7ST5G FAQ
1.How can I place an order for SZNZ9F2V7ST5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNZ9F2V7ST5G 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 SZNZ9F2V7ST5G reliable?
The price and inventory of SZNZ9F2V7ST5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNZ9F2V7ST5G is usually 5 days.
3.What payment methods are accepted for SZNZ9F2V7ST5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNZ9F2V7ST5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNZ9F2V7ST5G?
SZNZ9F2V7ST5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNZ9F2V7ST5G 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 SZNZ9F2V7ST5G?
For technical support, including SZNZ9F2V7ST5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNZ9F2V7ST5G requirements.
6.How does Aetrix verify that SZNZ9F2V7ST5G is sourced from the original manufacturer or authorized distributors?
All SZNZ9F2V7ST5G 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 SZNZ9F2V7ST5G meets industry standards.
7.What is the process for return or replacement of SZNZ9F2V7ST5G?
All SZNZ9F2V7ST5G units undergo pre-shipment inspection (PSI). If there is an issue with SZNZ9F2V7ST5G, 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 SZNZ9F2V7ST5G part is unused and in its original packaging.
Return procedure for SZNZ9F2V7ST5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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