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onsemi SZNZ8F3V9MX2WT5G
- Part No.:
- SZNZ8F3V9MX2WT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- 2-XDFN
- Datasheet:
-
SZNZ8F3V9MX2WT5G.pdf
- Description:
- DIODE ZENER 3.9V 250MW 2-X2DFNW
- Quantity:
- Payment:
- Shipping:
Inventory:7,425
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Product details
Overview
SZNZ8F3V9MX2WT5G from onsemi is an AEC-Q101-qualified 3.65–4.15 V Zener diode in a wettable flank X2DFNW2 (0402) package, rated for 250 mW dissipation at 25 °C on FR-4 board with 1 oz. Cu, featuring 5 Ω max Zener impedance at 5 mA and 5 nA reverse leakage at 1 V, used for precision voltage clamping in automotive control units and portable electronics.
For engineers reviewing the SZNZ8F3V9MX2WT5G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, AOI-compatible package details, and automotive-grade compliance status - all confirmed from onsemi's official NZ8F Series datasheet Rev. 4 (Nov. 2025).
Technical Context
This device operates as a unidirectional Zener regulator with nominal breakdown voltage of 3.9 V (typical), specified at test current IZT = 5 mA. Its low-profile X2DFNW2 package enables high-density PCB layouts while supporting automated optical inspection via wettable flanks.
Thermal performance is defined by RJA = 415 °C/W (FR-4, minimum pad), requiring derating at 1.5 mW/°C above 25 °C. It exhibits a typical temperature coefficient near +4 mV/°C in the 3.3–4.7 V range and capacitance of 210 pF at 0 V bias and 1 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.65 V min to 4.15 V max @ IZT = 5 mA - defines clamping threshold tolerance band for overvoltage protection circuits |
| Power Dissipation (PD) | 250 mW @ TA = 25 °C (FR-4, 1 oz. Cu, minimum pad) - sets maximum continuous DC power handling under standard layout |
| Zener Impedance (ZZT) | ≤100 Ω @ IZT = 5 mA - determines regulation stiffness and AC ripple suppression capability |
| Reverse Leakage (IR) | ≤5 nA @ VR = 1 V - ensures minimal standby current draw in battery-powered systems |
| Capacitance (C) | 210 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent traces |
| Forward Voltage (VF) | ≤0.9 V @ IF = 10 mA - supports use as low-drop rectifier or ESD clamp in bidirectional protection schemes |
| Junction Temp Range | −65 °C to +150 °C - enables operation in under-hood automotive environments and industrial edge nodes |
Pinout & Package
The SZNZ8F3V9MX2WT5G is housed in the X2DFNW2 surface-mount package (Case 711BG), measuring 1.00 mm × 0.60 mm × 0.37 mm with 0.65 mm pitch, featuring wettable flanks for reliable solder joint inspection. It uses a 2-terminal configuration: Pin 1 = Cathode, Pin 2 = Anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener cathode terminal | Connected to regulated voltage rail; reverse-biased during clamping; marking side identifies this terminal |
| 2 (Anode) | Zener anode terminal | Connected to ground or lower-potential reference; completes conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Wettable flank leads | Enables 100% automated optical inspection (AOI) of solder fillets without X-ray, reducing post-SMT defect escapes |
| Pb-Free, Halogen-Free | Complies with RoHS Directive 2011/65/EU and JEDEC JS709E, supporting green manufacturing requirements |
| Low body height (0.40 mm) | Minimizes profile in ultra-thin handhelds and stacked PCB assemblies where Z-height is constrained |
| SZ prefix designation | Indicates controlled change management, PPAP capability, and traceable lot-level documentation per automotive supply chain standards |
Applications
| Automotive Body Control Module | USB-C Port Protection |
|---|---|
Use Scenario: Clamping transient surges on LIN bus lines and sensor supply rails exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standalone Zener clamp providing fast-response voltage limiting without active control logic. Use Value: Maintains <4.15 V clamping ceiling across −40 °C to +125 °C ambient, meeting OEM robustness requirements for Class B ECUs. |
Use Scenario: Protecting USB-C CC line receivers from ESD and hot-plug overshoot during connector mating. IC Role / Device Role / Timing Role: Passive bidirectional clamp leveraging low C (210 pF) and fast Zener turn-on to suppress sub-100 ns transients. Use Value: Prevents latch-up in USB PD controllers by limiting CC line voltage to ≤4.15 V while adding negligible capacitive loading to high-speed signaling paths. |
| Industrial IoT Sensor Node | Medical Wearable Power Rail |
Use Scenario: Stabilizing 3.3 V LDO output feeding ultra-low-power MCU and MEMS accelerometer in battery-operated field sensors. IC Role / Device Role / Timing Role: Secondary shunt regulator absorbing microsurges during wireless transmission bursts. Use Value: Delivers <5 nA leakage at 1 V bias, extending shelf life and operational runtime without compromising regulation accuracy. |
Use Scenario: Providing fail-safe overvoltage protection on regulated 3.3 V supply feeding analog front-end and Bluetooth LE radio in FDA-cleared wearables. IC Role / Device Role / Timing Role: Redundant Zener clamp placed downstream of primary LDO to prevent >4.15 V exposure to sensitive analog circuitry. Use Value: Ensures patient-safety-critical voltage limits are enforced even if upstream regulator fails open, satisfying IEC 62304 clause 5.1.3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1SMB5913BT3G | 4.3 V nominal Zener, DO-214AA package (3.5 mm × 1.9 mm), 3 W PD, 500 Ω ZZT | Higher power, larger footprint, no AEC-Q101 rating - suited for non-automotive industrial surge suppression | Select when higher surge energy absorption is required and board space permits larger package |
| BZX384-C3V9,115 | 3.9 V nominal Zener, SOD-323 package (1.7 mm × 1.3 mm), 300 mW PD, 90 Ω ZZT, no wettable flanks | Non-automotive grade, lacks AOI support and PPAP documentation - suitable for consumer portables only | Select for cost-sensitive consumer designs where AEC-Q101 and AOI are not mandated |
Compared with SZNZ8F3V9MX2WT5G, the 1SMB5913BT3G offers higher surge capacity but sacrifices miniaturization and automotive qualification, while the BZX384-C3V9,115 provides tighter voltage tolerance in a smaller footprint but omits wettable flanks and AEC-Q101 validation - making SZNZ8F3V9MX2WT5G the optimal choice for space-constrained, safety-critical automotive and medical applications.
Availability
SZNZ8F3V9MX2WT5G is available at Aetrix Electronics and suitable for automotive body control modules, USB-C interface protection, and industrial IoT sensor nodes requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SZNZ8F3V9MX2WT5G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NZ8F Series - including SZNZ8F3V9MX2WT5G - was engineered specifically for space-constrained, high-reliability voltage regulation in automotive ECUs and portable electronics, emphasizing AOI compatibility, AEC-Q101 compliance, and ultra-low-profile packaging.
FAQ
What is the Zener voltage tolerance of SZNZ8F3V9MX2WT5G?
The SZNZ8F3V9MX2WT5G has a Zener voltage range of 3.65 V minimum to 4.15 V maximum at IZT = 5 mA, corresponding to ±6.4% tolerance about the nominal 3.9 V value. This standard tolerance series is distinct from the tighter ±2.5% S-series variants like SZNZ8F3V9SMX2WT5G, and is validated per onsemi's NZ8F Series datasheet Rev. 4.
Is SZNZ8F3V9MX2WT5G qualified for automotive applications?
Yes, SZNZ8F3V9MX2WT5G is AEC-Q101 qualified and PPAP capable, as indicated by its "SZ" prefix per onsemi's datasheet. It meets stress testing requirements for temperature cycling, humidity bias, and mechanical shock applicable to automotive under-hood and cabin modules, with full traceability and controlled change documentation.
What is the thermal resistance of SZNZ8F3V9MX2WT5G on a standard FR-4 board?
SZNZ8F3V9MX2WT5G has a junction-to-ambient thermal resistance (RJA) of 415 °C/W when mounted on an FR-4 board with minimum pad size and 1 oz. copper. This value assumes no thermal vias or extended copper pours; derating is required at 1.5 mW/°C above 25 °C ambient per the datasheet's maximum ratings table.
Does SZNZ8F3V9MX2WT5G support automated optical inspection (AOI)?
Yes, SZNZ8F3V9MX2WT5G uses the X2DFNW2 package with wettable flank leads, enabling full-side-view AOI of solder fillets without requiring X-ray inspection. This feature is explicitly called out in the datasheet's Specification Features section and supports zero-defect assembly goals in high-volume automotive manufacturing.
What is the maximum reverse leakage current for SZNZ8F3V9MX2WT5G?
The maximum reverse leakage current for SZNZ8F3V9MX2WT5G is 5 nA at VR = 1 V and TA = 25 °C, as specified in the Electrical Characteristics table on page 2 of the onsemi datasheet. This ultra-low leakage supports long battery life in always-on sensor nodes and wearable medical devices.
SZNZ8F3V9MX2WT5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- NZ8F
- Package/Case:
- 2-XDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±6.41%
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 2-X2DFNW (1x0.6)
SZNZ8F3V9MX2WT5G FAQ
1.How can I place an order for SZNZ8F3V9MX2WT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNZ8F3V9MX2WT5G 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 SZNZ8F3V9MX2WT5G reliable?
The price and inventory of SZNZ8F3V9MX2WT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNZ8F3V9MX2WT5G is usually 5 days.
3.What payment methods are accepted for SZNZ8F3V9MX2WT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNZ8F3V9MX2WT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNZ8F3V9MX2WT5G?
SZNZ8F3V9MX2WT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNZ8F3V9MX2WT5G 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 SZNZ8F3V9MX2WT5G?
For technical support, including SZNZ8F3V9MX2WT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNZ8F3V9MX2WT5G requirements.
6.How does Aetrix verify that SZNZ8F3V9MX2WT5G is sourced from the original manufacturer or authorized distributors?
All SZNZ8F3V9MX2WT5G 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 SZNZ8F3V9MX2WT5G meets industry standards.
7.What is the process for return or replacement of SZNZ8F3V9MX2WT5G?
All SZNZ8F3V9MX2WT5G units undergo pre-shipment inspection (PSI). If there is an issue with SZNZ8F3V9MX2WT5G, 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 SZNZ8F3V9MX2WT5G part is unused and in its original packaging.
Return procedure for SZNZ8F3V9MX2WT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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