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onsemi SZNZ8F4V3MX2WT5G
- Part No.:
- SZNZ8F4V3MX2WT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- 2-XDFN
- Datasheet:
-
SZNZ8F4V3MX2WT5G.pdf
- Description:
- DIODE ZENER 4.3V 250MW 2-X2DFNW
- Quantity:
- Payment:
- Shipping:
Inventory:8,871
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Product details
Overview
SZNZ8F4V3MX2WT5G from onsemi is a 250 mW AEC-Q101-qualified Zener diode in X2DFNW2 (0402) wettable flank package, with nominal Zener voltage 4.3 V (4.09–4.52 V), 5 mA test current, 100 Ω dynamic impedance, and 5 µA leakage at 1 V reverse bias - used for precision voltage clamping and ESD protection in automotive control units and portable electronics.
For engineers reviewing the SZNZ8F4V3MX2WT5G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), low-profile 0.40 mm height, AOI-compatible wettable flanks, AEC-Q101 qualification, and 210 pF capacitance at 0 V - critical for compact, high-reliability power rail stabilization.
Technical Context
This device operates as a unidirectional Zener regulator with sharp reverse breakdown at 4.3 V, optimized for low-leakage (<5 µA @ VR = 1 V), stable temperature coefficient (typ. +9 mV/°C), and fast transient response due to low junction capacitance (210 pF). It functions exclusively in reverse-bias regulation mode, with no forward conduction role beyond VF ≤ 0.9 V @ 10 mA.
Thermal performance is defined by two derating curves: 250 mW @ TA = 25 °C on minimal FR-4 pad (415 °C/W RJA), or 500 mW @ TA = 25 °C on 150 mm² copper (247 °C/W RJA). Non-repetitive peak reverse power is rated at 40 W for 100 µs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.09–4.52 V @ IZT = 5 mA - defines clamping threshold for 5 V rail protection |
| Power Dissipation (PD) | 250 mW (min. pad) / 500 mW (150 mm² Cu) - sets max continuous clamp energy without thermal runaway |
| Zener Impedance (ZZT) | 100 Ω @ IZT = 5 mA - determines regulation stiffness under load transients |
| Leakage Current (IR) | 5 µA @ VR = 1 V - ensures minimal quiescent current in standby circuits |
| Junction Temp Range | −65 °C to +150 °C - supports operation in under-hood automotive environments |
| Capacitance (C) | 210 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering capability |
| Package | X2DFNW2 (0402, 1.00 × 0.60 × 0.37 mm) - enables automated optical inspection and ultra-dense PCB layouts |
Pinout & Package
The SZNZ8F4V3MX2WT5G uses the X2DFNW2 surface-mount package (Case 711BG), measuring 1.00 mm × 0.60 mm × 0.37 mm with wettable flank side walls for reliable solder joint inspection. It features a 2-terminal configuration: Pin 1 (cathode) marked with polarity indicator on top surface; Pin 2 (anode) unmarked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; polarity must be observed to enable reverse-bias conduction |
| 2 (Anode) | Reference/ground terminal | Tied to system ground or lower-potential rail; completes Zener conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Wettable flank leads | Enables 100% automated optical inspection (AOI) of solder fillets on 0402 footprint |
| Pb-free, RoHS compliant | Meets global environmental regulations without compromising thermal or electrical performance |
| Low body height (0.40 mm) | Reduces board profile for slim handheld devices and stacked PCB assemblies |
| Stable tempco (+9 mV/°C) | Minimizes voltage drift across −40 °C to +125 °C operating range in automotive cabins |
Applications
| Automotive Engine Control Unit (ECU) | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Protecting 5 V microcontroller I/O lines from load dump transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Zener clamping element placed between MCU pin and ground to shunt excess voltage above 4.3 V. Use Value: Prevents latch-up or permanent damage during ISO 7637-2 Pulse 5a events with <5 µA standby leakage. | Use Scenario: Stabilizing VBUS line against overshoot during USB-C hot-plug transitions. IC Role / Device Role / Timing Role: Low-capacitance (210 pF) shunt regulator absorbing fast-rising transients before they reach PD controller IC. Use Value: Maintains signal integrity on CC lines while limiting VBUS excursion to ≤4.52 V without degrading 10 Gbps data rates. |
| Industrial Sensor Signal Conditioning | Medical Wearable Battery Monitor |
Use Scenario: Providing reference voltage for analog front-end ADC in pressure sensor module. IC Role / Device Role / Timing Role: Precision Zener source delivering stable 4.3 V bias to op-amp feedback network. Use Value: Enables ±1% measurement accuracy over −40 °C to +85 °C with <100 Ω dynamic impedance limiting error under varying load. | Use Scenario: Clamping battery voltage monitor input during Li-ion cell charging surges. IC Role / Device Role / Timing Role: Reverse-biased protection diode limiting ADC input to safe range below 4.52 V. Use Value: Preserves 12-bit resolution of fuel gauge IC by eliminating saturation-induced offset errors during 0.5 C charge pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V3,115 | Same 4.3 V nominal Zener, but SOD-323 package (1.7 × 1.3 mm); higher RJA (500 °C/W); 100 nA leakage @ 1 V | Larger footprint; unsuitable for AOI-dependent automotive production; better for low-leakage industrial sensors | Select when ultra-low leakage dominates over space constraints and AOI requirements |
| MMSZ4V3ET1G | Same 4.3 V rating, SOD-123 package (3.7 × 1.6 mm); 500 mW PD; 10 µA leakage @ 1 V; no AEC-Q101 qualification | Higher power handling but incompatible with automotive PPAP; lacks wettable flanks for AOI | Select for cost-sensitive consumer power supplies where AEC-Q101 and AOI are not required |
Compared with BZX384-B4V3,115 and MMSZ4V3ET1G, the SZNZ8F4V3MX2WT5G uniquely combines AEC-Q101 qualification, 0402 wettable flank packaging, and 5 µA leakage - making it the only choice for space-constrained, AOI-governed automotive ECUs requiring validated reliability.
Availability
SZNZ8F4V3MX2WT5G is available at Aetrix Electronics and suitable for automotive engine control units, USB-C power delivery protection, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and high-volume production cycles.
Supply support for SZNZ8F4V3MX2WT5G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications - with core expertise in power management, analog, sensors, and connectivity.
The NZ8F Series is designed specifically for compact, high-reliability voltage regulation in space-constrained automotive and portable electronics - emphasizing AEC-Q101 compliance, wettable flank manufacturability, and tight parametric consistency across temperature.
FAQ
What is the Zener voltage tolerance of SZNZ8F4V3MX2WT5G?
The SZNZ8F4V3MX2WT5G has a Zener voltage range of 4.09 V to 4.52 V at IZT = 5 mA, corresponding to ±5% tolerance about the nominal 4.3 V rating. This tolerance is confirmed in the Electrical Characteristics table on page 2 of the onsemi datasheet (Rev. 4, Nov. 2025) and applies across the full operating temperature range of −65 °C to +150 °C.
Is SZNZ8F4V3MX2WT5G qualified for automotive use?
Yes, SZNZ8F4V3MX2WT5G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the datasheet's Specification Features section and reinforced by the "SZ" prefix denoting automotive-grade process controls and site-specific change management. Its −65 °C to +150 °C junction temperature range further validates suitability for under-hood and cabin applications.
What does the "MX2WT5G" suffix indicate in SZNZ8F4V3MX2WT5G?
The "MX2WT5G" suffix identifies the SZNZ8F4V3MX2WT5G as part of onsemi's standard-tolerance NZ8F series in X2DFNW2 package, supplied in 8,000-unit tape-and-reel format (T5G). The "M" denotes standard tolerance (±5%), "X2W" specifies the X2DFNW2 footprint, "T5" indicates 8 k reel, and "G" confirms Pb-free/RoHS compliance.
Can SZNZ8F4V3MX2WT5G be used for ESD protection?
SZNZ8F4V3MX2WT5G is not rated or characterized for ESD protection per IEC 61000-4-2; it is designed for steady-state voltage regulation and transient overvoltage clamping. While its 40 W non-repetitive peak reverse power (PZSM) supports short-duration transients, dedicated TVS diodes like NUP4105MR6T1G offer superior ESD robustness and faster response.
What is the thermal resistance (RJA) of SZNZ8F4V3MX2WT5G on a standard PCB?
The SZNZ8F4V3MX2WT5G has two specified RJA values: 415 °C/W on an FR-4 board with minimum pad (1 oz. Cu), and 247 °C/W on an FR-4 board with 150 mm² copper area (1 oz. Cu). These values directly determine allowable power dissipation at elevated ambient temperatures and must be applied based on actual PCB layout per Note 1 and Note 2 in the Maximum Ratings table.
SZNZ8F4V3MX2WT5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- NZ8F
- Package/Case:
- 2-XDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±5%
- 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)
SZNZ8F4V3MX2WT5G FAQ
1.How can I place an order for SZNZ8F4V3MX2WT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNZ8F4V3MX2WT5G 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 SZNZ8F4V3MX2WT5G reliable?
The price and inventory of SZNZ8F4V3MX2WT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNZ8F4V3MX2WT5G is usually 5 days.
3.What payment methods are accepted for SZNZ8F4V3MX2WT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNZ8F4V3MX2WT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNZ8F4V3MX2WT5G?
SZNZ8F4V3MX2WT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNZ8F4V3MX2WT5G 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 SZNZ8F4V3MX2WT5G?
For technical support, including SZNZ8F4V3MX2WT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNZ8F4V3MX2WT5G requirements.
6.How does Aetrix verify that SZNZ8F4V3MX2WT5G is sourced from the original manufacturer or authorized distributors?
All SZNZ8F4V3MX2WT5G 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 SZNZ8F4V3MX2WT5G meets industry standards.
7.What is the process for return or replacement of SZNZ8F4V3MX2WT5G?
All SZNZ8F4V3MX2WT5G units undergo pre-shipment inspection (PSI). If there is an issue with SZNZ8F4V3MX2WT5G, 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 SZNZ8F4V3MX2WT5G part is unused and in its original packaging.
Return procedure for SZNZ8F4V3MX2WT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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